P20D1
Exhaust Aftertreatment Fuel Injector B Control Circuit/Open
P20D1 is an OBD-II diagnostic trouble code meaning: Exhaust Aftertreatment Fuel Injector B Control Circuit/Open. Common causes: open or short circuit in the injector control circuit, malfunction of the exhaust cleaning system injector. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Problems with the exhaust gas cleaning system
- Possible errors in other sensors of the exhaust cleaning system
Causes
- Open or short circuit in the injector control circuit
- Malfunction of the exhaust cleaning system injector
- Problems with the relay or circuit fuse
- Engine control unit malfunction
- Oxidation of contacts in connectors
How to Fix
- Check the integrity of the injector wiring and connectors
- Check injector resistance (must meet specification)
- Check the voltage at the injector connector
- If necessary, replace the exhaust cleaning system injector
- Check and, if necessary, reflash the engine control unit
Related codes
Error P20D1 by Vehicle Brand
FAQ
What does the P20D1 code mean?
P20D1 is an OBD-II diagnostic trouble code that indicates: Exhaust Aftertreatment Fuel Injector B Control Circuit/Open
What causes a P20D1 error code?
The most common causes of P20D1 include: Open or short circuit in the injector control circuit; Malfunction of the exhaust cleaning system injector; Problems with the relay or circuit fuse; Engine control unit malfunction.
How do I fix a P20D1 diagnostic trouble code?
To fix P20D1: Check the integrity of the injector wiring and connectors. Check injector resistance (must meet specification). Check the voltage at the injector connector. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20D1?
Yes, but get it checked soon
How much does it cost to fix P20D1?
The estimated repair cost for P20D1 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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