OBD-II code · Powertrain (generic, extended)
P2626 O2 Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 1
The ECU detects an open in the pumping current trim circuit of the wide-band oxygen sensor on bank 1 sensor 1. Without trim correction, the lambda value reported by the sensor is not accurate.
Is it safe to drive with P2626?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyTrim wire open
- PossibleInternal sensor fault
- Less likelyPin pushed back out of connector body
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
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Oxygen Sensor Wideband, Oxygen Sensor Trim Wiring
Related codes
- P2C62O2 Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 3
- P2623Injector Control Pressure Regulator Circuit / Open
- P2624Injector Control Pressure Regulator Circuit Low
- P2625Injector Control Pressure Regulator Circuit High
- P2627O2 Sensor Pumping Current Trim Circuit Low Bank 1 Sensor 1
- P2628O2 Sensor Pumping Current Trim Circuit High Bank 1 Sensor 1
- P2629O2 Sensor Pumping Current Trim Circuit / Open Bank 2 Sensor 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.