P1348high severityPowertrain
Misfire Cylinder 4 With Fuel Cut-Off
on 1996 BMW 318i 1.9L I4 M44 · RWD
What this code means
The DME detected a severe misfire on Cylinder 4 triggering fuel cut-off to protect the catalytic converter. This is a catalyst protection strategy that disables fuel delivery to the misfiring cylinder.
Symptoms
- Check Engine Light flashing
- Rough running
- Reduced power
- Engine vibration at idle
Common causes
- Faulty ignition coil Cylinder 4
- Worn or fouled spark plug Cylinder 4
- Injector failure Cylinder 4
- Low compression Cylinder 4
- Intake manifold leak
Diagnostic steps
- Check misfire counters
- Swap ignition coil from Cylinder 4
- Replace spark plug Cylinder 4
- Test injector Cylinder 4
- Compression test
Repair notes
Replace the faulty ignition component on Cylinder 4.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1