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P0138 Diagnostic Trouble Code Discussion for May 2009

Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage


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Trouble Ticket Help Requests for DTC P0138
Help Request Posted
1998 Dodge Ram 1500 Truck 5.2L Cuts out, Misfire, MIL Lamp on VIN: 1B7HC13YXW
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. Customer states that occassionally on accelleration the vehicle will stumble and try to stall. We found that if we brake torque it ,it will sometime pop back through the intake on different cylinders ,you can watch it on the misfire counter, misted the wires a...
May 14, 2009
2001 Dodge Ram 1500 Truck 5.9L MIL Lamp on VIN: 3B7HF13Z41
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. ... Pulled the codes and found a P0138-1/2 O2 Sensor Shorted to Voltage. I followed the troubleshooting chart, I let the engine run for 5 minutes and the O2 voltage was above 1.2v, it would go up as high as 1.8v. I disconnected the harness connector from the s...
May 18, 2009
2005 Chrysler Town & Country (Van) LX 3.3L MIL Lamp on VIN: 2C4GP44R25
P0138: Bank 1 Sensor 2 voltage too high. This van came in with an EGR position sensor code (hard fault) and an intermittent PO138 O2 sensor code. We replaced the O2 sensor and the EGR assembly. The EGR problem is solved but it keeps resetting the PO138 code. We replaced the sensor a second time and i...
May 21, 2009
1999 Chevrolet K2500 5.7L Excessive Emissions, Cuts out VIN: 1GCGK23R0X
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. Hello I need some input. Customer brings his truck in after installing rebuilt engine he bought truck not running. Falls on its face under load I check cam retard per request at -13 , adjusted to 0 . no help customer has replaced all fuel system including spid...
May 23, 2009
2006 Chrysler Town & Country (Van) Touring 3.8L MIL Lamp on VIN: 2A8GP54L66
P0138: O2 Circuit High Voltage B1S2. Hi Techs! Code P0138 keeps returning after replacing with OEM O2 sensor B1S2. Heater circuit positive from PCM is 13.7 volts for B1S1. Volts for B1S2 Heater is only 9 volts. Ground is good. Both O2s disconnected reads 1.270 volts on signal wire and on PIDs. B1...
May 29, 2009
1999 Chevrolet K2500 5.7L Excessive Emissions, Cuts out VIN: 1GCGK23R0X
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. Hello I need some input. Customer brings his truck in after installing rebuilt engine he bought truck not running. Falls on its face under load I check cam retard per request at -13 , adjusted to 0 . no help customer has replaced all fuel system including spid...
May 30, 2009
1998 Dodge Ram 1500 Truck 5.2L Cuts out, Misfire, MIL Lamp on VIN: 1B7HC13YXW
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. Customer states that occassionally on accelleration the vehicle will stumble and try to stall. We found that if we brake torque it ,it will sometime pop back through the intake on different cylinders ,you can watch it on the misfire counter, misted the wires a...
May 14, 2009
2001 Dodge Ram 1500 Truck 5.9L MIL Lamp on VIN: 3B7HF13Z41
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. ... Pulled the codes and found a P0138-1/2 O2 Sensor Shorted to Voltage. I followed the troubleshooting chart, I let the engine run for 5 minutes and the O2 voltage was above 1.2v, it would go up as high as 1.8v. I disconnected the harness connector from the s...
May 18, 2009
2005 Chrysler Town & Country (Van) LX 3.3L MIL Lamp on VIN: 2C4GP44R25
P0138: Bank 1 Sensor 2 voltage too high. This van came in with an EGR position sensor code (hard fault) and an intermittent PO138 O2 sensor code. We replaced the O2 sensor and the EGR assembly. The EGR problem is solved but it keeps resetting the PO138 code. We replaced the sensor a second time and i...
May 21, 2009
1999 Chevrolet K2500 5.7L Excessive Emissions, Cuts out VIN: 1GCGK23R0X
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. Hello I need some input. Customer brings his truck in after installing rebuilt engine he bought truck not running. Falls on its face under load I check cam retard per request at -13 , adjusted to 0 . no help customer has replaced all fuel system including spid...
May 23, 2009
2006 Chrysler Town & Country (Van) Touring 3.8L MIL Lamp on VIN: 2A8GP54L66
P0138: O2 Circuit High Voltage B1S2. Hi Techs! Code P0138 keeps returning after replacing with OEM O2 sensor B1S2. Heater circuit positive from PCM is 13.7 volts for B1S1. Volts for B1S2 Heater is only 9 volts. Ground is good. Both O2s disconnected reads 1.270 volts on signal wire and on PIDs. B1...
May 29, 2009
1999 Chevrolet K2500 5.7L Excessive Emissions, Cuts out VIN: 1GCGK23R0X
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. Hello I need some input. Customer brings his truck in after installing rebuilt engine he bought truck not running. Falls on its face under load I check cam retard per request at -13 , adjusted to 0 . no help customer has replaced all fuel system including spid...
May 30, 2009