Error code
OBD2 P2203
OBD2P2203
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
NOx Sensor Circuit High Input.
Severity
moderateCan be driven but may cause further damage or emissions issues.
Summary
P2203 indicates that the NOx sensor circuit on bank 1 of the engine is reading an abnormally high input voltage.
Common Causes
- Wiring short to positive, NOx sensor
Fixes
- Repair the wiring issue causing a short to positive on the NOx 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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