P116A
O2 Signal Circuit (NOx Sensor 1)
P116A is an OBD-II diagnostic trouble code meaning: O2 Signal Circuit (NOx Sensor 1). Common causes: open or short circuit in the nox sensor circuit, malfunction of the nox sensor itself. Estimated repair cost: $89–278.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Unstable idling
- Dips during acceleration
Causes
- Open or short circuit in the NOx sensor circuit
- Malfunction of the NOx sensor itself
- Poor contact in the sensor connector
- Corroded contacts or damaged wiring
- Problems with the engine control unit
How to Fix
- Visual inspection of NOx sensor wiring and connectors
- Checking the continuity of the sensor circuit with a multimeter
- Diagnostics of resistance and sensor signals
- Replacing the NOx sensor if necessary
- Cleaning contacts and restoring damaged wiring
Related codes
FAQ
What does the P116A code mean?
P116A is an OBD-II diagnostic trouble code that indicates: O2 Signal Circuit (NOx Sensor 1)
What causes a P116A error code?
The most common causes of P116A include: Open or short circuit in the NOx sensor circuit; Malfunction of the NOx sensor itself; Poor contact in the sensor connector; Corroded contacts or damaged wiring.
How do I fix a P116A diagnostic trouble code?
To fix P116A: Visual inspection of NOx sensor wiring and connectors. Checking the continuity of the sensor circuit with a multimeter. Diagnostics of resistance and sensor signals. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P116A?
Limited driving only, diagnose soon
How much does it cost to fix P116A?
The estimated repair cost for P116A is $89–278. Actual cost depends on your vehicle, location, and labor rates.
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