Fault Code P2203
Code meaning, symptoms, possible causes, part number, and estimated cost.
P2203
NOx Sensor Circuit High Input Bank 1
This code indicates a higher-than-expected input in the NOx sensor circuit for Bank 1. This could point to an electrical issue with the sensor or its wiring.
Part Details
Part Name
NOx Sensor
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪800 - ₪3000
Engine Location
Exhaust system
Symptoms
- Check Engine Light on
- Emissions test failure
- Less than optimal engine performance
- Increased fuel consumption
Possible Causes
- 1Short to voltage in NOx sensor circuit
- 2Faulty NOx sensor
- 3Damaged wiring or connectors
- 4Faulty ECM/PCM (rare)
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