Powertrain
generic / SAE
P2239
O2 Sensor Pumping Current Circuit High (Bank 1 Sensor 1)
Pumping current at the bank 1 sensor 1 wide-band lambda probe is above the upper limit — short to supply or open return path.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / 39
Possible causes
- Pump line shorted to supply high
- Return path to ECU open medium
- Connector pins corroded - high contact resistance 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: 120–600 €
- Estimated time: 0.5–2 h
- Component: oxygen sensor wideband
- Component: oxygen sensor wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012