Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number6 / 26
Possible causes
- Trim wire open high
- Internal sensor fault medium
- Pin pushed back out of connector body low
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 150–600 €
- Estimated time: 0.5–2 h
- Component: oxygen sensor wideband
- Component: oxygen sensor trim wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012