pratik
Member
Hi all,
Since February I have been getting the DTC P2629, which used to come on monthly basis, but then every few days, and lately within a matter of days/hours/minutes. 2 weeks ago I tried replacing HO2S on pre-catalytic converter on driver side (Bank 2, Sensor 1), but that did not help, and neither did the CRC 05103 QD electronic cleaner.
Today (5/13/22) I got these 5 PENDING codes:
P2629 - O2 Sensor Positive Current Trim Circuit/Open Bank 2 Sensor 1
P0151 - O2 Circuit Low Voltage (Bank 2, Sensor 1) (possible causes - short to ground from any of the 4 wires)
P064E - Internal Control Module O2 Sensor Processor Performance - Bank 2 (it can be wiring or PCM.. if addressing other DTCs doesn't solve the prob, maybe it needs a new PCM!)
P1647 - Linear O2 Sensor Control Chip (Bank 2) (damaged wiring or damaged PCM)
P2197 - O2 Sensor Signal Biased/Stuck Lean - Bank 2, Sensor 1 (This DTC sets when the fuel control system no longer detects switching for a calibrated amount of time.)
I checked all the connections based on Pinpoint Test DZ (for P2629, and also P0151) and came to conclusion that there is no wiring issues / short circuit, and it is a PCM problem (per DZ15, the UO2SGREF circuit voltage came out to be 2.23 V, rather than 2.4-2.6 V, pointing to DZ28 - same for P2629 diagnosis, where DZ27 pointed to DZ28).
DZ28 asks to carry-out PCM self-check - how to do it? What are the next steps?
Thank you,
Pratik
Since February I have been getting the DTC P2629, which used to come on monthly basis, but then every few days, and lately within a matter of days/hours/minutes. 2 weeks ago I tried replacing HO2S on pre-catalytic converter on driver side (Bank 2, Sensor 1), but that did not help, and neither did the CRC 05103 QD electronic cleaner.
Today (5/13/22) I got these 5 PENDING codes:
P2629 - O2 Sensor Positive Current Trim Circuit/Open Bank 2 Sensor 1
P0151 - O2 Circuit Low Voltage (Bank 2, Sensor 1) (possible causes - short to ground from any of the 4 wires)
P064E - Internal Control Module O2 Sensor Processor Performance - Bank 2 (it can be wiring or PCM.. if addressing other DTCs doesn't solve the prob, maybe it needs a new PCM!)
P1647 - Linear O2 Sensor Control Chip (Bank 2) (damaged wiring or damaged PCM)
P2197 - O2 Sensor Signal Biased/Stuck Lean - Bank 2, Sensor 1 (This DTC sets when the fuel control system no longer detects switching for a calibrated amount of time.)
I checked all the connections based on Pinpoint Test DZ (for P2629, and also P0151) and came to conclusion that there is no wiring issues / short circuit, and it is a PCM problem (per DZ15, the UO2SGREF circuit voltage came out to be 2.23 V, rather than 2.4-2.6 V, pointing to DZ28 - same for P2629 diagnosis, where DZ27 pointed to DZ28).
DZ28 asks to carry-out PCM self-check - how to do it? What are the next steps?
Thank you,
Pratik
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