Can't clear codes with scan tool?
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Can't clear codes with scan tool?
Hello everybody,
I have a 2004 T&C with the 3.3L V6 and 120k miles. The MIL came on, I did the key dance and got P0038, Bank 1, Position 2 02 Sensor Heater voltage out of range high. O2 sensors have never been replaced.
I googled, and despite wading through a sea of poor and disjointed information (sometimes I wonder if bots are doing some of those write-ups) I decided to replace the downstream O2 sensor. Pulled it out (it's an NTK) and did not see any obvious trauma. Replaced it with a Bosch as the dealership was closed today and it was all the local parts stores have on hand. Put it all back together today and started drive cycles. MIL would not go off. I thought disconnecting the battery and draining anything residual would wipe the DTC and turn off the MIL - it did not. I used a scan tool to clear the codes and turn off the MIL, but it came back on within seconds. The second time I cleared the code, the MIL never turned off. The codes are P0038 and P0038 (pending).
My thought is that even if it is a sensor fault, it would take the PCM one trip to logic that out, issue a DTC, and set the MIL, so I'm confused as to why the code can't even be cleared.
My next step is to try an OEM O2 sensor, but other than that I'd like to hear from some of you all. I read the service manual. At some point today on the internet I saw a flow chart for going at this issue systematically, but for the life of me I can't find it.
Thank you!
I have a 2004 T&C with the 3.3L V6 and 120k miles. The MIL came on, I did the key dance and got P0038, Bank 1, Position 2 02 Sensor Heater voltage out of range high. O2 sensors have never been replaced.
I googled, and despite wading through a sea of poor and disjointed information (sometimes I wonder if bots are doing some of those write-ups) I decided to replace the downstream O2 sensor. Pulled it out (it's an NTK) and did not see any obvious trauma. Replaced it with a Bosch as the dealership was closed today and it was all the local parts stores have on hand. Put it all back together today and started drive cycles. MIL would not go off. I thought disconnecting the battery and draining anything residual would wipe the DTC and turn off the MIL - it did not. I used a scan tool to clear the codes and turn off the MIL, but it came back on within seconds. The second time I cleared the code, the MIL never turned off. The codes are P0038 and P0038 (pending).
My thought is that even if it is a sensor fault, it would take the PCM one trip to logic that out, issue a DTC, and set the MIL, so I'm confused as to why the code can't even be cleared.
My next step is to try an OEM O2 sensor, but other than that I'd like to hear from some of you all. I read the service manual. At some point today on the internet I saw a flow chart for going at this issue systematically, but for the life of me I can't find it.
Thank you!
