Dodge p0138

The P0138 DTC is a generic trouble code that says the oxygen sensor circuit (Bank 1, Sensor 2) is exhibiting higher voltage than normal. The Powertrain Control Module (PCM) detects that the voltage coming from the sensor is higher than what the manufacturer specs illustrate.

P0138 is a common OBDII code that occurs in many vehicles, including the Dodge Journey. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself. There are also some less likely problems that can cause P0138.How to Fix P0138 Engine Code in 3 Minutes [2 DIY Methods / Only $8.99] - YouTube. nonda. 91.3K subscribers. Subscribed. 673. 179K views 3 years ago UNITED …24 Aug 2012 ... ... p0138 is the high voltage code and the p0141 is the heater circuit so ... Chrysler Dodge Jeep P0157 P0158 P0137 and/or P0138. The Car Doctor ... P0138 code Dodge Ram 1500 P/U I'm new here. After reading various forums about trouble codes, this group seems to be on top of this stuff. I'm no expert mechanic so bear with me a little. The vehicle is a 99 Dodge P/U, 3.9 V-6, 126,000 miles that I purchased new in 99. I do most of the maintenance myself. Recent work perfor... For both errors, possible causes: Bad O2 sensor. Bad O2 sensor heater circuit (bad sensor). Fuel pressure too high. Engine coolant temperature sensor bad. Bad O2 sensor wiring. Bad engine controller. For both sensors to "fail" concurrently suggests the problem is not with the sensors but is something common to both.Answered in 4 minutes by: Dodge Mechanic: TIM. TIM. Category: Dodge. Satisfied Customers: 6,503. Experience: DODGE SERVICE MANAGER- 20 + YEARS. Verified. TIM : hello, code p0138 is for the left side downstream and the code p0158 is for the right upstream o2 sensor.22 Jan 2023 ... How To Fix Toyota P0138 Code O2 Sensor Circuit High Voltage (Bank 1 Sensor 2) O2 Sensor removal tool on Amazon: https://amzn.to/3w6vqdA ...3 May 2015 ... Home mechanic diagnosing a 2000 Maxima with what appears to be a simple issue but turns out to take some unexpected twists complicated by ...

Ram Year. 2013. Engine. Hemi 5.7. Yes you would be looking at the driver's side O2 sensor after the cat. Since the code reads P0138 1/2 O2S Shorted To Voltage, #1 - meaning driver's side, #2 meaning after the cat. Same O2 sensor that went out on my '03 when I had it.Here are a few of the top reported P0138 code symptoms. Check engine Light; Reduced fuel economy; Misfiring engine; Rough idle; Trouble accelerating; Stalling …trouble code p0158 2006 dodge stratus 2006 dodge stratus 2.7 140k obd 2 code po158 have replaced and catalytibank 2 pos. 1 and pos. 2 sensors and catalytic ... 2002 nissan sentra P1217 P0507 P0138 P0158 P0117 P0139 P1146 Hello I have a 2002 nissan sentra 1.8l it turns over but no start and the OBD2 reader sats its 8 codes P1217 P0507 P0138 ...3.0 EcoBurner. I'd start by cleaning the MAF as that may be throwing things out of whack and causing the problem. Also, a clogged catalytic converter might do this. P0172 is too much fuel in the exhaust gases and P0183 is downstream sensor lack of O2, but I suppose too much fuel in the exhaust could cause P0183.The benefits of saying yes to a new project are pretty obvious. It’s what a team player would say and it’s a way to demonstrate that you’re ready for new and exciting responsibilit...trouble code p0158 2006 dodge stratus 2006 dodge stratus 2.7 140k obd 2 code po158 have replaced and catalytibank 2 pos. 1 and pos. 2 sensors and catalytic ... 2002 nissan sentra P1217 P0507 P0138 P0158 P0117 P0139 P1146 Hello I have a 2002 nissan sentra 1.8l it turns over but no start and the OBD2 reader sats its 8 codes P1217 P0507 P0138 ...Feb 8, 2019 · P0138 is a common OBDII code that occurs in many vehicles, including the Dodge Journey. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself. There are also some less likely problems that can cause P0138. El Engine Control module (ECM) interpreta rica cuando el voltaje del oxygen sensor es por encima de los 0.45 voltios. El código P0138 es común en: Chery, Chevrolet Aveo, Chrysler Town & Country, Dodge Dakota, Dodge Neon, Dodge Ram 1500, Dodge Stratus, Ford Explorer, Ford Focus, Ford Fusion, Honda, Jeep Grand Cherokee, Jeep Liberty, Nissan ...

Check Engine Code P0138. Jump to Latest Follow. 3K views 2 replies 3 participants last post by FSTDANGO3 Jan 16, 2012. GolsonMolson Discussion starter. 447 posts · Joined 2009. #1 · Jan 15, 2012. P0138 = 1/2 O2s shorted to voltage.31 Mar 2023 ... P0138 O2 Sensor Circuit High Voltage (Bank 1, Sensor 2 | symptoms | Causes | location | solutions #P0138 #o2sensor #malfunction #circuit ...Dec 15, 2010 · A code P0138 may mean that one or more of the following has happened: -Faulty O2 sensor. -Short to battery voltage in O2 sensor signal circuit. -High fuel pressure (not as likely) New: 2005 Dodge Ram 1500 QCSB 4x4 Hemi Laramie Bright Silver. Flowmaster SI/DO 40 Series. Dodge Neon P0138 Causes. Here are the most common issues that cause the P0138 code in the Dodge Neon. They are presented in order (somewhat) of most to least likely to cause the problem. Bad Oxygen Sensor– The O2 sensor itself is one of the most likely reasons that P0138 is triggering your service engine soon light. Although it is …Sep 14, 2008 · P0138 engine code came on my 2005 grand caravan 3.8l. Changed out the rear o2 sensor with bosch direct fit on the cat - Answered by a verified Dodge Mechanic We use cookies to give you the best possible experience on our website.

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P0138 is a common OBDII code that occurs in many vehicles, including theDodge Stratus. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more; Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself; There are also some less likely problems that can cause P0138.Diagnostic test P0132,P0138,P0152,P0158, O2 Sensor Circuit High. Step 1. Check for an active DTC. If an O2 sensor signal circuit is shorted to voltage, all O2 sensor voltage readings displayed on the scan tool will be approximately 5.0 volts. Diagnose the sensor that set the most current DTC.P0138 is a common OBDII code that occurs in many vehicles, including the Dodge Journey. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself. There are also some less likely problems that can cause …I have P0132 and P0138 codes coming up. I was plague with P0700 codes just recently but FINALLY Trouble shooted that, but now im cursed with P0132 and P0138. I am having Rough Low idling, idles between 700-500 then will dip to 300 to almost dead. It idles rough when in park, neutral , and When stopped in Drive.

23 years of experience. The code P0138 is on for two possible different situations. Either the oxygen sensor has shorted out on the exhaust system or the wiring from the battery to the sensor has a short or break in it. Check the oxygen sensor and see if the wiring is plugged in and if there is any broken wires at or near the sensor. If there ...P0158 is an OBDII code that occurs in many vehicles, including the Dodge Charger. The code is triggered when: The voltage at the O2 sensor remains above threshold for 20 seconds or more. Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself. There are also some less likely problems that can cause …Someone suggested buying the Mopar 02 sensor instead of an off-brand, so I got one and installed it. The P0138 code came back almost immediately. Same location, bank 1 sensor 2. So, bank 1 should be driver's side exhaust, however the down pipe connects to the right side down pipe and runs into one cat.Apr 8, 2022 · The O2 sensor circuit is responsible for examining the exhaust gas and detecting the air to fuel ratio difference. Some common symptoms that signify the engine code P0138 include: • Rough idle. • Poor fuel economy. • “On” check engine light. • Bad gas mileage. • Lagging / missing engine. • Emissions test is a fail. Ram Year. 2013. Engine. Hemi 5.7. Yes you would be looking at the driver's side O2 sensor after the cat. Since the code reads P0138 1/2 O2S Shorted To Voltage, #1 - meaning driver's side, #2 meaning after the cat. Same O2 sensor that went out on my '03 when I had it.The P0138 could be bad a bad O2 sensor, High fuel pressure or short to battery in O2 sensor circuit. P1491 is possibly your AC fan or fan relay . 2004 Dodge Ram 1500 QC Laramie Hemi!! :rck: Color - Black 7 Speaker Infinity Cd Stereo with 6 CD Stacker Tow package Iceburg Stainless Steel Nerf Bars Color matched Arrow Matrix Canopy …Dodge Ram P0137: O2 Sensor Low Voltage (Bank 1 -Sensor 2) P0137 is a fairly common OBDII code that occurs in the Dodge Ram, it’s a general code. This means that it has the same meaning for any vehicle. This code is supposed to let you know that there is an issue with the wiring or harness going to the sensor, or the sensor itself is bad ...Moody’s rating agency affirmed the Spanish government’s Baa3 credit rating today, maintaining its negative outlook. The lack of a downgrade means Spain’s rating is still “investmen...Open-source software gave birth to a slew of useful software in recent years. Many of the great technologies that we use today were born out of open-source development: Android, Fi...Dodge. Code: P0138. Definition: O2 SENSOR 1/2 CIRCUIT HIGH. Description: The 4-Wire Oxygen (O2) Sensor is equipped with a galvanic battery that typically generates a voltage signal between 0.0 volts and 1.0 volts. The 4-Wire O2 Sensor also includes a heating element that keeps the sensor at proper operating temperature during all operating modes.

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A code P0138 may mean that one or more of the following has happened: Faulty O2 sensor. Short to battery voltage in O2 sensor signal circuit. High fuel pressure (not as likely) …This car is perfect for drag racing with the kids on the way to Grandma's house. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and its partners. I ...Jun 4, 2015 · This video will show you how to troubleshoot and fix P0138 and P0139 DtcTHIS IS THE BEST AND VERY AFFORDABLE SCAN TOOL. I ONLY RECOMMEND THIS ONE. I USE IT I... The length of Dodge’s 2015 Ram Trucks range in length from 209 inches to more than 248 inches, depending on the model. The 2015 Ram 1500 is 209 inches long, while the 2015 Ram 2500... P0138 code Dodge Ram 1500 P/U I'm new here. After reading various forums about trouble codes, this group seems to be on top of this stuff. I'm no expert mechanic so bear with me a little. The vehicle is a 99 Dodge P/U, 3.9 V-6, 126,000 miles that I purchased new in 99. I do most of the maintenance myself. Recent work perfor... What Do P0138 and P2271 Codes Mean Together? The P0138 code stands for O2 Sensor Circuit High Voltage (Bank 1, Sensor 2). Both of these codes have to do with the same downstream oxygen sensor, which means that the sensor itself is probably faulty. There could also be a connection issue with the wiring or contamination. How Do You Clear Code P2271?Manufacturers constantly strive to build their vehicles to meet tougher emission standards each year. This can be a nightmare when trying to diagnose a check...

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Remember how embarrassed Apple was when a Senate investigation revealed a disproportionate share of its profits accrued to an Irish subsidiary with no employees? Me neither. Rememb...To help you in finding the correct oxygen sensor, here are some more specifics: Vehicles with 2 upstream oxygen sensors, a P0132 DTC is identifying the one that's on Bank 1. Bank 1 is the bank of cylinders that have cylinders 1, 3, 5, and 7 (5.2L and 5.9L V-8 engines) and 1, 3, and 5 (3.9L V-6 engines). Vehicles with only 1 upstream oxygen ...The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the. engine or emission package, the vehicle may use a total of either 2 or 4 sensors. 1/2). With this emission package, the upstream sensor (1/1) is located just before the main catalytic convertor. The.Feb 13, 2005 · Trouble Code P0138 Jump to Latest Follow 9K views 2 replies 2 participants last post by k2epm Feb 14, 2005 These codes, po 138 bank 1 sensor 2 shorted to voltage and code po158 means bank 2 sensor two shorted to voltage. these are the two rear oxygen sensors in the exhaust system. there two up frt and two in the rear, check the wiring on the two rear sensors, make sure that the wiring is not cut or stuck between metal. if the wiring is good then ...7617 posts · Joined 2013. #2 · Nov 28, 2021. P0520-ENGINE OIL PRESSURE SENSOR CIRCUIT. Whenever you see the word circuit in a code description, you should check the wiring harness first before buying anything. Especially look for wire rub through on the harness that is on the top side of the engine.Feb 8, 2019 · P0138 is a common OBDII code that occurs in many vehicles, including the Dodge Avenger. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself. There are also some less likely problems that can cause P0138. Diagnostic trouble code P0139 indicates that the powertrain control module (PCM) has detected a potential issue with the signal from the rear oxygen sensor on bank 1. The rear sensor is located behind the catalytic converter, and bank 1 refers to the side of the engine that houses the #1 cylinder. In GM automotive terminology, “cross-counts ...Dodge Tuning; Dodge Tuning - Engine, Gas; Help clearing secondary O2 sensors; Page 1 of 2 1 2 Last. Jump to page: Results 1 to 20 of 23 ... P0138 - O2 Circuit High Voltage (Bank 1, Sensor 2)(Pending) P0158 - O2 Circuit High Voltage (Bank 2, Sensor 2)(Pending) P219B - (Permanent)2002 Dodge Ram 1500 5.9LHow to Fix a P0138 Code: O2 Sensor Circuit High Voltage Bank 1 Sensor 2Manufacturers constantly strive to build their vehicles to mee...The P0132 code indicates that there is a high voltage issue on your Oxygen sensor or Bank 1. This code occurs when the powertrain control module (PCM) detects that the oxygen sensor’s voltage reading is too high. In some cases, the code sets because the isn’t responding quickly enough to adjust for the air-fuel mixture in the combustion ... ….

If you have received the P0138 code, it means that your O2 sensor is experiencing high voltage. This can be caused by a variety of issues, including: Faulty O2 Sensor: The most common cause of high voltage in an O2 sensor is a faulty sensor.P0138 is a common OBDII code that occurs in many vehicles, including the Dodge Caravan. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself. There are also some less likely problems that can cause …Description. The conditions that caused this diagnostic to fail is when the upstream O2 Sensor biased from an exhaust leak, O2 sensor contamination, or some other extreme operating condition. The downstream O2 sensor is considered to be protected from extreme environments by the catalyst. The Powertrain Control Module monitors the downstream O2 ...Te suministramos todo lo que necesitas saber sobre el código DTC P0138 Descripción, causas, síntomas y posibles soluciones. LEER SOLUCIÓN DEL CÓDIGO O...A code P0138 may mean that one or more of the following has happened: Faulty O2 sensor. Short to battery voltage in O2 sensor signal circuit. High fuel pressure (not as likely) …If the code changes then you know it's the wire. If it doesn't change then you could have a clogged injector or something else. I would try changing wires first since thats the easiest thing to do. *DodgeTalk.com 318 Enthusiast Member # (79)*. 1999 Dodge Durango SLT 5.2L, Dynomax muffler, Cummins Turbo diesel tailpipe, JVC deck, JVC …DODGE CHALLENGER WHERE IS BANK 1 BANK 2 LOCATED, WHAT IS BANK 1 BANK 2 DODGE CHALLENGER Dodge Parts here: https://amzn.to/3y4oDBx More Specific Parts Bello...In most cases, replacing the faulty oxygen sensor will eliminate the problem responsible for the P0038 code. The exact fix, however, will likely differ based on the make and/or model of the vehicle. A P0038 Dodge case, for example, may entail a different repair than those that have worked for a P0038 in a Chrysler.The aged vessels are vulnerable to faults like engine failures and pose safety risks to crews and the environment, according to the Washington Post. Jump to Russia is using decades... Dodge p0138, Dec 28, 2007 · purplepistil Discussion starter. 69 posts · Joined 2007. #5 · Dec 29, 2007. yeah thats what i thought 2. i get the cel with sensor off, heater off. this morning i changed the tune to rear o2 heater ON and sensor OFF. still get the codes 0138 &0158. thanx for the help. Danko sealed shaker-Franks milled SS heads-SPARROW-JBA shorties-Flowmaster ... , If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V. P0138 Mazda Code - HO2S RR Circuit High Input., Feb 8, 2019 · P0138 is a common OBDII code that occurs in many vehicles, including the Dodge Avenger. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself. There are also some less likely problems that can cause P0138. , Check Engine Code P0138. Jump to Latest Follow. 3K views 2 replies 3 participants last post by FSTDANGO3 Jan 16, 2012. GolsonMolson Discussion starter. 447 posts · Joined 2009. #1 · Jan 15, 2012. P0138 = 1/2 O2s shorted to voltage., 1999 dodge ram 1500: v8..a engine code of p0138 o2 sensor bank 1 volts…. Hello Wayne, This code means your downstream oxygen sensor is shorted to voltage. 95% of the time this is just a sensor. There is a internal heater that shorts out and creates too much voltage on the signal circuit., I have a check engine light that shows the P0138 code, Could someone shed some light, it's supposed to mean the following: P0138 (M) 1/2 O2 Sensor Shorted To Voltage Oxygen sensor input voltage maintained above normal operating range. ... A forum community dedicated to all Dodge owners and enthusiasts. Come join the discussion …, Código P0138 Dodge Descripción del código de falla P0138 Dodge. Se describe con un voltaje alto en el circuito del sensor de oxigeno 2 ubicado en el banco 1. Un código muy común en la mayoría de los modelos de Dodge. Siendo un código genérico de tren motriz, cualquier modelo fabricado con sistema OBD2 puede presentar esta falla., P0138 is a common OBDII code that occurs in many vehicles, including the Chrysler 300. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself. There are also some less likely problems that can cause P0138., Jan 1, 2011 · The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the. engine or emission package, the vehicle may use a total of either 2 or 4 sensors. 1/2). With this emission package, the upstream sensor (1/1) is located just before the main catalytic convertor. The. , There are many differences between the 2015 Dodge Journey SE and Journey SXT, including the price and various optional features. The Journey SE has a recommended price of $23,395, ..., , Vehicle: 2005 Dodge Ram 1500 4.7l 4x4. 05 Ram 1500 Engine codes P0138, P0138PD, P0420. Post by Dodge05 » Sat Mar 31, 2018 7:35 pm. ... P0138-1/2 O2 SENSOR SHORTED TO VOLTAGE P0138PD - PD indicates the code is also pending - it has failed the test and will set again., P0138 is a common OBDII code that occurs in many vehicles, including the Chevy Silverado. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself. There are also some less likely problems that can cause …, 4 posts · Joined 2014. #1 · Feb 24, 2014. My 1998 Dodge Dakota V6 was giving these two codes: P0320 and P0138. It's symptoms are sometimes hard to start and sometimes runs rough after starting, may need to give it some gas. It doesn't usually start on the first key turn, usually the 2nd. If you turn it to on, let it prime the gas line, turn ..., RE: P0138 code on 2002 Dodge Intrepid. It must have been a one-time out of tolerance fault. After around 40 engine cycles, it the malfunction hasn't reoccured, the light will go out and the code will erase (that is unless you reset the code prior). Anyway, if it tripped once, it will probally trip again in the future., I had my check engine light come on yesterday, so I had the code checked at Autozone, came back as a P0138, oxygen sensor bank 1 sensor 2. I know that this sensor is located after the catalytic converter, but where exactly on the car is it located? I want to replace this myself, and help would be appreciated., A triggered P0138 code means the Engine Control Module (ECM) has detected a high voltage signal (over 999 mV) from the downstream sensor for more than 10 seconds. A …, Oct 25, 2020 · =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code P0138 Saving Repair Parts... , To diagnose the P0138 Toyota code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour., A code P0138 may mean that one or more of the following has happened: Faulty O2 sensor. Short to battery voltage in O2 sensor signal circuit. High fuel pressure (not as likely) …, P0138 engine code came on my 2005 grand caravan 3.8l. Changed out the rear o2 sensor with bosch direct fit on the cat - Answered by a verified Dodge Mechanic We use cookies to give you the best possible experience on our website., Jun 19, 2018 · 2005 Dodge Grand Caravan 3.8l. P0138, Using scantool live data, s. Using scan tool, sensor 1 is reading between .2-.74, - Answered by a verified Dodge Mechanic , Dodge Durango 1st Generation 1998-2003. Durango Discussions 1998-03 ... P0138. 2848 Views 6 Replies 4 Participants Last post by Siggi Gunda, Oct 25, 2009. Siggi Gunda, Jul 27, 2013 · P0137 p0138 o2 sensor issues. I recently purchased a 2007 dodge charger 3.5L off a small police dept in ontario and it runs great, decent shape except I got codes 0137 and 0138 on my first short Drive. I replaced the problems sensor reset codes and drove it once with no codes. Moved it off the street and codes came back. , For both errors, possible causes: Bad O2 sensor. Bad O2 sensor heater circuit (bad sensor). Fuel pressure too high. Engine coolant temperature sensor bad. Bad O2 sensor wiring. Bad engine controller. For both sensors to "fail" concurrently suggests the problem is not with the sensors but is something common to both., This video will show you how to troubleshoot and fix P0138 and P0139 DtcTHIS IS THE BEST AND VERY AFFORDABLE SCAN TOOL. I ONLY RECOMMEND THIS ONE. I USE IT I..., I have a check engine light that shows the P0138 code, Could someone shed some light, it's supposed to mean the following: P0138 (M) 1/2 O2 Sensor Shorted To Voltage Oxygen sensor input voltage maintained above normal operating range. ... A forum community dedicated to all Dodge owners and enthusiasts. Come join the discussion …, Oct 25, 2020 · =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code P0138 Saving Repair Parts... , Meaning. Your vehicle Engine Control Module ( ECM) stores a P0138 when it detects the O2 sensor for Bank 1, Sensor 2 fails a voltage test. The voltage must register below 1.2 volts for over 10 seconds and indicates there is insufficient oxygen in the exhaust stream. In short, your oxygen sensor is doing its job and your engine’s fuel/oxygen ... , Sep 2, 2009 · A few months later a CEL read P0138 - & I had the O2 sensor changed. The code returned & I ignored it. Meanwhile, the tranny started slamming into gear at 2nd & reverse. Finally during tuneup last weekend I had the CEL scanned again, and got P0138, P0037 & P1762. Changed all the sensors indicated & had the tranny fluid checked. , Dodge. Code: P0138. Definition: O2 SENSOR 1/2 CIRCUIT HIGH. Description: The 4-Wire Oxygen (O2) Sensor is equipped with a galvanic battery that typically generates a voltage signal between 0.0 volts and 1.0 volts. The 4-Wire O2 Sensor also includes a heating element that keeps the sensor at proper operating temperature during all operating modes., P0137 is the OBD-II generic code indicating the O2 sensor for bank 1 sensor 2 is failing to increase the voltage output above .21 volts indicating excessive oxygen in the exhaust. This code occurs when the engine control module (ECM) sees the voltage of the O2 sensor for bank 1 sensor 2 below .21 volts when the ECM has commanded the fuel to a ..., Code P0138 is triggered when the powertrain computer or PCM determines that the rear oxygen sensor voltage remained above 450 millivolts for more than twenty seconds (varies with vehicle make and model) or that the air fuel ratio sensor remained in a rich-biased mode for too long (varies with vehicle make and model).