P0203
Cylinder 3 Injector A Circuit
P0203 is an OBD-II diagnostic trouble code meaning: Cylinder 3 Injector A Circuit. Common causes: open or short circuit in the injector wiring harness, cylinder 3 injector malfunction. Estimated repair cost: $56–167.
Symptoms
- Misfire in cylinder 3
- Unstable engine operation
- Power reduction
- Increased fuel consumption
- Check Engine Light Is On
Causes
- Open or short circuit in the injector wiring harness
- Cylinder 3 injector malfunction
- Problems with the ECU
- Poor contact in the injector connector
- Corroded or damaged wires
How to Fix
- Check the injector wiring harness for opens and shorts
- Check the resistance of the injector of cylinder 3
- Inspect the injector and ECU connectors for damage.
- Replace the injector if necessary
- Clean or replace damaged wires
Related codes
Error P0203 by Vehicle Brand
FAQ
What does the P0203 code mean?
P0203 is an OBD-II diagnostic trouble code that indicates: Cylinder 3 Injector A Circuit
What causes a P0203 error code?
The most common causes of P0203 include: Open or short circuit in the injector wiring harness; Cylinder 3 injector malfunction; Problems with the ECU; Poor contact in the injector connector.
How do I fix a P0203 diagnostic trouble code?
To fix P0203: Check the injector wiring harness for opens and shorts. Check the resistance of the injector of cylinder 3. Inspect the injector and ECU connectors for damage.. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0203?
Limited driving only, diagnose soon
How much does it cost to fix P0203?
The estimated repair cost for P0203 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat