Powertrain
generic / SAE
P2233
O2 Sensor Signal Circuit Shorted to Heater Circuit (Bank 1 Sensor 3)
The O2 sensor signal wire on bank 1 sensor 3 has shorted to the heater wire. This pulls the signal away from a measurement of exhaust composition and produces erratic fuel-trim behaviour.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / 33
Possible causes
- Short between signal and heater wires high
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–500 €
- Estimated time: 0.5–2.5 h
- Component: oxygen sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012