OBD-II code · Powertrain (generic, extended)
P2629 O2 Sensor Pumping Current Trim Circuit / Open Bank 2 Sensor 1
The wide-band trim resistor circuit on bank 2 sensor 1 is open. Air-fuel feedback for bank 2 cannot be calibrated, fuel control runs degraded.
Is it safe to drive with P2629?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen calibration trim resistor
- PossibleOpen sensor connector pin
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Oxygen Sensor Wideband B2s1, Sensor Calibration Resistor, Wiring Harness
Related codes
- P2626O2 Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1
- P2627O2 Sensor Pumping Current Trim Circuit Low Bank 1 Sensor 1
- P2628O2 Sensor Pumping Current Trim Circuit High Bank 1 Sensor 1
- P262AFuel Injector - Pilot Injection Not Learned
- P262BControl Module Power Off Timer Performance
- P262CSensor Reference Voltage G Circuit / Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.