Error code
OBD2 P2238
OBD2P2238
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
O2 Sensor Positive Current Control Circuit Low.
Severity
moderateCan drive but may experience increased fuel consumption.
Summary
P2238 indicates an issue with the positive current control circuit of the heated oxygen sensor (HO2S) on bank 1, which is located before the catalytic converter.
Symptoms
- Illuminated warning light
- Increased fuel consumption
- One or more readiness monitors may not initiate or complete
Common Causes
- Burnt, damaged, shorted, disconnected, or corroded wiring and/or connectors
- Defective upstream oxygen sensor
- Use of unsuitable aftermarket sensors
- Failed PCM (rare)
Diagnosis
- Inspect wiring and connectors for damage or corrosion
- Check the upstream oxygen sensor for defects
Fixes
- Replace damaged wiring, connectors, or faulty oxygen sensor
FAQ
Can I drive with P2238?
Yes, but you may experience increased fuel consumption.
What causes P2238?
Common causes include damaged wiring/connectors and a faulty oxygen sensor.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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