Error code
OBD2 P2237
OBD2P2237
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
O2 Sensor Positive Current Control Circuit/Open.
Severity
highCan drive but performance will be affected; should address the issue promptly.
Summary
P2237 indicates an open circuit in the positive current control circuit of the heated oxygen sensor (HO2S) on bank 1, sensor 1.
Symptoms
- Stored trouble code and illuminated MIL (CHECK ENGINE) light
- Increased fuel consumption leading to reduced power at all engine speeds and throttle settings
- Other codes related to fuel trims and misfires may be present
- Potential catalytic converter failure if unresolved
Common Causes
- Damaged, burnt, shorted, disconnected, or corroded wiring and connectors
- Defective oxygen sensor (HO2S)
- Failed or failing PCM (rare)
Diagnosis
- Inspect and test wiring and connectors for damage, corrosion, or disconnection.
- Check oxygen sensor (HO2S) for defects.
- Verify correct installation of oxygen sensor if recently replaced.
Fixes
- Repair damaged wiring and connectors; replace faulty oxygen sensor if necessary.
FAQ
What does P2237 mean?
P2237 indicates an open circuit in the positive current control circuit of the heated oxygen sensor (HO2S) on bank 1, sensor 1.
How do I fix P2237?
Repair damaged wiring and connectors or replace a faulty oxygen sensor if necessary.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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