Powertrain
generic / SAE
P0038
HO2S Heater Control Circuit High (Bank 1 Sensor 2)
The heater control line for the upstream bank 1 oxygen sensor reads above the expected voltage, typical of a short to supply.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 38
Possible causes
- Heater wire shorted to supply high
- Connector pins corroded - high contact resistance low
- Supply wire pinched against B+ source low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 80–350 €
- Estimated time: 0.5–1.5 h
- Component: oxygen sensor heater
- Component: sensor wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012