OBD Guide
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P1356

Loss Of Ignition Diagnostic Module Input To PCM

P1356 is an OBD-II diagnostic trouble code meaning: Loss Of Ignition Diagnostic Module Input To PCM. Common causes: open or short circuit in signal circuit, malfunction of the ignition diagnostic module. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can 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

  1. Check signal circuit integrity
  2. Check the power and ground of the diagnostic module
  3. Inspect connectors for corrosion or damage
  4. Test the ignition diagnostic module
  5. Replace the module if necessary

Related codes

P1351P1355P1360

Error P1356 by Vehicle Brand

BMWBuickCadillacChevroletChryslerFordGMGMCLincolnMercuryOldsmobileSaturnVolkswagen

FAQ

What does the P1356 code mean?

P1356 is an OBD-II diagnostic trouble code that indicates: Loss Of Ignition Diagnostic Module Input To PCM

What causes a P1356 error code?

The most common causes of P1356 include: Open or short circuit in signal circuit; Malfunction of the ignition diagnostic module; Module power problems; Poor connection in connectors.

How do I fix a P1356 diagnostic trouble code?

To fix P1356: Check signal circuit integrity. Check the power and ground of the diagnostic module. Inspect connectors for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1356?

Yes, but get it checked soon

How much does it cost to fix P1356?

The estimated repair cost for P1356 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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