P2045
Reductant Temperature Sensor A Circuit High
P2045 is an OBD-II diagnostic trouble code meaning: Reductant Temperature Sensor A Circuit High. Common causes: reductant temperature sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $28–89.
Symptoms
- Check Engine light comes on
- Reduced efficiency of the SCR system
- Possible increase in NOx emissions
- In some cases - limiting engine power
- Unusual reducing agent temperature readings on the instrument panel (if any)
Causes
- Reductant temperature sensor malfunction
- Open or short circuit in the sensor circuit
- Poor connection or corrosion in connectors
- Wiring Harness Problems
- Engine ECU malfunction (rare)
How to Fix
- Check the continuity of the temperature sensor circuit
- Inspect connectors and connections for corrosion or damage
- Check temperature sensor resistance according to manufacturer specifications
- If necessary, replace the reducing agent temperature sensor
- Reset the error code and check if it returns
Related codes
Error P2045 by Vehicle Brand
FAQ
What does the P2045 code mean?
P2045 is an OBD-II diagnostic trouble code that indicates: Reductant Temperature Sensor A Circuit High
What causes a P2045 error code?
The most common causes of P2045 include: Reductant temperature sensor malfunction; Open or short circuit in the sensor circuit; Poor connection or corrosion in connectors; Wiring Harness Problems.
How do I fix a P2045 diagnostic trouble code?
To fix P2045: Check the continuity of the temperature sensor circuit. Inspect connectors and connections for corrosion or damage. Check temperature sensor resistance according to manufacturer specifications. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2045?
Yes, but get it checked soon
How much does it cost to fix P2045?
The estimated repair cost for P2045 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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