P1203
Fuel System Failure Caused No. 3 Cylinder Misfire
P1203 is an OBD-II diagnostic trouble code meaning: Fuel System Failure Caused No. 3 Cylinder Misfire. Common causes: malfunction of fuel injector 3 cylinders, dirty or clogged nozzle. Estimated repair cost: $17–89.
Symptoms
- Misfire in cylinder 3
- Engine troubles
- Power reduction
- Increased fuel consumption
- Check Engine Light Is On
Causes
- Malfunction of fuel injector 3 cylinders
- Dirty or clogged nozzle
- Problems with the fuel pump
- Malfunction of the fuel pressure regulator
- Damage to the wiring to the injector
How to Fix
- Check the condition of the fuel injector of cylinder 3
- Clean or replace the nozzle if necessary
- Check the fuel pressure in the system
- Check the integrity of the wiring to the injector
- Check the operation of the fuel pump and pressure regulator
Related codes
Error P1203 by Vehicle Brand
FAQ
What does the P1203 code mean?
P1203 is an OBD-II diagnostic trouble code that indicates: Fuel System Failure Caused No. 3 Cylinder Misfire
What causes a P1203 error code?
The most common causes of P1203 include: Malfunction of fuel injector 3 cylinders; Dirty or clogged nozzle; Problems with the fuel pump; Malfunction of the fuel pressure regulator.
How do I fix a P1203 diagnostic trouble code?
To fix P1203: Check the condition of the fuel injector of cylinder 3. Clean or replace the nozzle if necessary. Check the fuel pressure in the system. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1203?
Limited driving only, diagnose soon
How much does it cost to fix P1203?
The estimated repair cost for P1203 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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