P20AF
Reductant Metering Unit Temperature Sensor Circuit High
P20AF is an OBD-II diagnostic trouble code meaning: Reductant Metering Unit Temperature Sensor Circuit High. Common causes: malfunction of the injection unit temperature sensor, open or short circuit in the sensor circuit. Estimated repair cost: $33–89.
Symptoms
- Check Engine light comes on
- Possible reduction in engine power
- Increased fuel consumption
- Increased NOx emissions
- SCR error message on instrument panel
Causes
- Malfunction of the injection unit temperature sensor
- Open or short circuit in the sensor circuit
- Poor contact in wiring connectors
- Sensor contact corrosion
- Engine ECU malfunction
How to Fix
- Check the condition of the temperature sensor and its connection
- Check the integrity of the wiring and contacts in the circuit
- Measure the sensor resistance and compare with standards
- If necessary, replace the temperature sensor
- Check and update ECU software if necessary
Related codes
Error P20AF by Vehicle Brand
FAQ
What does the P20AF code mean?
P20AF is an OBD-II diagnostic trouble code that indicates: Reductant Metering Unit Temperature Sensor Circuit High
What causes a P20AF error code?
The most common causes of P20AF include: Malfunction of the injection unit temperature sensor; Open or short circuit in the sensor circuit; Poor contact in wiring connectors; Sensor contact corrosion.
How do I fix a P20AF diagnostic trouble code?
To fix P20AF: Check the condition of the temperature sensor and its connection. Check the integrity of the wiring and contacts in the circuit. Measure the sensor resistance and compare with standards. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20AF?
Yes, but get it checked soon
How much does it cost to fix P20AF?
The estimated repair cost for P20AF is $33–89. Actual cost depends on your vehicle, location, and labor rates.
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