P21CE
Reductant Quality Module Performance
P21CE is an OBD-II diagnostic trouble code meaning: Reductant Quality Module Performance. Common causes: reductant quality module malfunction, problems with wiring to the module. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- SCR System Error Message
- Unpleasant exhaust smell
Causes
- Reductant quality module malfunction
- Problems with wiring to the module
- Low quality or contamination of the reductant
- Control module software error
- Mechanical damage to the module
How to Fix
- Check the quality and level of the reductant
- Diagnose the reductant quality module
- Check the integrity of wiring and connectors
- Replace the reductant quality module if necessary
- Update ECU software
Related codes
Error P21CE by Vehicle Brand
FAQ
What does the P21CE code mean?
P21CE is an OBD-II diagnostic trouble code that indicates: Reductant Quality Module Performance
What causes a P21CE error code?
The most common causes of P21CE include: Reductant quality module malfunction; Problems with wiring to the module; Low quality or contamination of the reductant; Control module software error.
How do I fix a P21CE diagnostic trouble code?
To fix P21CE: Check the quality and level of the reductant. Diagnose the reductant quality module. Check the integrity of wiring and connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P21CE?
Yes, but get it checked soon
How much does it cost to fix P21CE?
The estimated repair cost for P21CE is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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