P1343
Misfire Cylinder 1 With Fuel Cut-off
P1343 is an OBD-II diagnostic trouble code meaning: Misfire Cylinder 1 With Fuel Cut-off. Common causes: faulty spark plug in cylinder 1, problems with the ignition coil or high voltage wires. Estimated repair cost: $6–89.
Symptoms
- Engine vibration at idle and under load
- Reduced engine power
- Increased fuel consumption
- Check Engine Light Is On
- Unstable engine operation
Causes
- Faulty spark plug in cylinder 1
- Problems with the ignition coil or high voltage wires
- Dirty or faulty fuel injectors
- Low compression in cylinder 1
- Problems with sensors (DPKV, DPRV)
How to Fix
- Check and replace spark plug in cylinder 1
- Diagnose and, if necessary, replace the ignition coil
- Check the condition of the fuel injector and clean or replace it
- Measure the compression in the cylinder
- Check the condition of the crankshaft and camshaft position sensors
Related codes
Error P1343 by Vehicle Brand
FAQ
What does the P1343 code mean?
P1343 is an OBD-II diagnostic trouble code that indicates: Misfire Cylinder 1 With Fuel Cut-off
What causes a P1343 error code?
The most common causes of P1343 include: Faulty spark plug in cylinder 1; Problems with the ignition coil or high voltage wires; Dirty or faulty fuel injectors; Low compression in cylinder 1.
How do I fix a P1343 diagnostic trouble code?
To fix P1343: Check and replace spark plug in cylinder 1. Diagnose and, if necessary, replace the ignition coil. Check the condition of the fuel injector and clean or replace it. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1343?
Do not drive — repair immediately
How much does it cost to fix P1343?
The estimated repair cost for P1343 is $6–89. Actual cost depends on your vehicle, location, and labor rates.
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