P20ED
SCR NOx Pre-Catalyst - Over Temperature Bank 1
P20ED is an OBD-II diagnostic trouble code meaning: SCR NOx Pre-Catalyst - Over Temperature Bank 1. Common causes: scr temperature sensor malfunction, problems with the urea injection nozzle. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased urea consumption (AdBlue)
- Unusual odors from the exhaust system
- Increased level of NOx in exhaust gases
Causes
- SCR temperature sensor malfunction
- Problems with the urea injection nozzle
- SCR system clogged
- SCR control unit malfunction
- Damage to the SCR system wiring harness
How to Fix
- Check the readings of the SCR temperature sensors
- Inspect the urea injection nozzle for blockages
- Check the integrity of the SCR system wiring harness
- Test the SCR control unit
- Replace damaged components if necessary
Related codes
Error P20ED by Vehicle Brand
FAQ
What does the P20ED code mean?
P20ED is an OBD-II diagnostic trouble code that indicates: SCR NOx Pre-Catalyst - Over Temperature Bank 1
What causes a P20ED error code?
The most common causes of P20ED include: SCR temperature sensor malfunction; Problems with the urea injection nozzle; SCR system clogged; SCR control unit malfunction.
How do I fix a P20ED diagnostic trouble code?
To fix P20ED: Check the readings of the SCR temperature sensors. Inspect the urea injection nozzle for blockages. Check the integrity of the SCR system wiring harness. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20ED?
Limited driving only, diagnose soon
How much does it cost to fix P20ED?
The estimated repair cost for P20ED is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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