Error code
OBD2 P2220
OBD2P2220
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
NOx Sensor Heater Control Circuit High.
Severity
moderateCan drive but may experience reduced performance and increased emissions.
Summary
P2220 indicates an issue with the NOx sensor heater control circuit being too high on bank 2 of the engine.
Common Causes
- Wiring short to positive, NOx sensor
Fixes
- Repair or replace the faulty wiring in the NOx sensor heater control circuit.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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- P2210NOx Sensor Heater Sense Circuit Low Input
- P2211NOx Sensor Heater Sense Circuit High Input