Error code
OBD2 P2236
OBD2P2236
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
O2 Sensor Signal Circuit Shorted to Heater Circuit.
Severity
moderateCan be driven but may cause further damage or reduced performance.
Summary
P2236 indicates that there is an issue with the heated oxygen sensor (H028) on bank 2, specifically that its signal circuit has shorted to the heater circuit.
Common Causes
- Wiring issues in the H025 system
Fixes
- Repair or replace faulty wiring in the H025 system.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
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- P2205NOx Sensor Heater Control Circuit/Open
- P2206NOx Sensor Heater Control Circuit Low
- P2207NOx Sensor Heater Control Circuit High
- P2208NOx Sensor Heater Sense Circuit
- P2209NOx Sensor Heater Sense Circuit Range/Performance
- P2210NOx Sensor Heater Sense Circuit Low Input
- P2211NOx Sensor Heater Sense Circuit High Input