P21AE
Reductant Level Sensor C Circuit Range/Performance
P21AE is an OBD-II diagnostic trouble code meaning: Reductant Level Sensor C Circuit Range/Performance. Common causes: reductant level sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $28–89.
Symptoms
- Check Engine light comes on
- Reduced engine power
- A message appears indicating that the reductant level is low
- Increased fuel consumption
- Problems starting the engine
Causes
- Reductant level sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Control unit software error
- Sensor contamination
How to Fix
- Check the level of the reductant in the tank
- Inspect the sensor circuit for damage
- Check the contacts in the sensor connector
- Test the sensor using diagnostic equipment
- Replace the reductant level sensor if necessary
Related codes
Error P21AE by Vehicle Brand
FAQ
What does the P21AE code mean?
P21AE is an OBD-II diagnostic trouble code that indicates: Reductant Level Sensor C Circuit Range/Performance
What causes a P21AE error code?
The most common causes of P21AE include: Reductant level sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Control unit software error.
How do I fix a P21AE diagnostic trouble code?
To fix P21AE: Check the level of the reductant in the tank. Inspect the sensor circuit for damage. Check the contacts in the sensor connector. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21AE?
Yes, but get it checked soon
How much does it cost to fix P21AE?
The estimated repair cost for P21AE is $28–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat