What does it mean?
P1310 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Ignition coil 3 control -feedback circuitmalfunction .
Symptoms
- MIL (check engine lamp) on, sometimes flashing under acceleration
- Misfire on cylinder 3 with a shaking idle
- Hesitation, flat spots and reduced power when pulling away
- Hard starting, especially when the engine is cold or damp
- Fuel smell from the exhaust and higher consumption
Likely causes
- Ignition coil 3 with a failed primary winding or a failed built-in igniter
- Open, shorted or high-resistance control (trigger) wire between the module and coil 3
- Feedback wire from coil 3 broken, shorted to ground or shorted to battery
- Corroded, loose or oil-flooded coil connector
- Missing supply voltage to the coil, or a poor ignition ground
- Failed ignition control module output stage for that coil
- Engine control module driver fault, only after the wiring and coil are cleared
How to fix it
- Read the freeze frame and check the misfire counters to confirm cylinder 3
- Swap coil 3 with a known-good coil and see whether the code follows the part
- With the key on, check for battery voltage and a clean ground at the coil connector
- Test the control and feedback wires end to end for continuity and for shorts to ground or battery
- Inspect the plug well for oil and water and check the boot for carbon tracking
- Remove and read the spark plug, checking the gap and the electrode condition
- Replace the coil or repair the circuit; assess the ignition control module last and verify with a road test