P12B3
Cylinder 1 Injection Timing Related
P12B3 is an OBD-II diagnostic trouble code meaning: Cylinder 1 Injection Timing Related. Common causes: malfunction of the fuel injector of cylinder 1, problems with the injector electrical circuit. Estimated repair cost: $17–89.
Symptoms
- Uneven engine operation
- Increased fuel consumption
- Reduced engine power
- Dips during acceleration
- Check Engine light comes on
Causes
- Malfunction of the fuel injector of cylinder 1
- Problems with the injector electrical circuit
- Malfunction of the crankshaft position sensor
- Problems with the engine control unit (ECU)
- Dirty or clogged nozzle
How to Fix
- Check the condition of the fuel injector of cylinder 1
- Check the electrical circuit of the injector for opens and shorts
- Check the operation of the crankshaft position sensor
- Clean or replace fuel injector if necessary
- Check and update engine control unit software
Related codes
FAQ
What does the P12B3 code mean?
P12B3 is an OBD-II diagnostic trouble code that indicates: Cylinder 1 Injection Timing Related
What causes a P12B3 error code?
The most common causes of P12B3 include: Malfunction of the fuel injector of cylinder 1; Problems with the injector electrical circuit; Malfunction of the crankshaft position sensor; Problems with the engine control unit (ECU).
How do I fix a P12B3 diagnostic trouble code?
To fix P12B3: Check the condition of the fuel injector of cylinder 1. Check the electrical circuit of the injector for opens and shorts. Check the operation of the crankshaft position sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P12B3?
Yes, but get it checked soon
How much does it cost to fix P12B3?
The estimated repair cost for P12B3 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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