What does it mean?
P1383 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Secondary Ignition Circuit Range Check Voltage Malfunction .
Symptoms
- MIL on, often together with misfire codes
- Rough idle and misfire under load or in wet weather
- Hesitation and reduced power when accelerating
- Higher fuel consumption
- Hard starting in damp conditions and an occasional exhaust pop
Likely causes
- Worn spark plugs with an excessive gap raising the required firing voltage
- Cracked or carbon tracked coil boots and damaged plug leads
- Ignition coil with weak secondary output
- Moisture or carbon tracking on the coil tower or distributor cap where fitted
- Poor coil ground or low supply voltage at the coil
- Very lean mixture or low compression raising firing voltage on one cylinder
- Faulty ignition module or measuring circuit
How to fix it
- Remove and read the spark plugs, check gap, electrode wear and colour
- Inspect coil boots and plug leads for cracks, carbon tracks and burn marks
- In the dark, mist a little water around the coils and look for arcing
- Measure plug lead resistance where leads are used
- Check coil supply voltage and ground quality with a multimeter
- Scope the secondary pattern and compare firing and burn voltages between cylinders
- Replace the worn secondary components, then run a compression test if firing voltage stays high