P1356
Loss Of Ignition Diagnostic Module Input To PCM
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Check engine' light on the dashboard
- Misfires
- Reduced engine power
- Increased fuel consumption
- Difficulty starting the engine
Causes
- Open or short circuit in signal circuit
- Malfunction of the ignition diagnostic module
- Module power problems
- Poor connection in connectors
- Engine control module (PCM) malfunction
How to Fix
- Check signal circuit integrity
- Check the power and ground of the diagnostic module
- Inspect connectors for corrosion or damage
- Test the ignition diagnostic module
- Replace the module if necessary