OBD Guide
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P1607

Powertrain Control Module Internal Circuit Malfunction

P1607 is an OBD-II diagnostic trouble code meaning: Powertrain Control Module Internal Circuit Malfunction. Common causes: malfunction of pcm internal circuits, problems with module power or grounding. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–556 (est.)

Symptoms

  • Check Engine Light Is On
  • Problems starting the engine
  • Loss of engine power
  • Unstable engine operation
  • The engine goes into emergency mode

Causes

  • Malfunction of PCM internal circuits
  • Problems with module power or grounding
  • Short circuit in wiring harness
  • Voltage surges in the on-board network
  • Physical damage to the PCM

How to Fix

  1. Check PCM power and ground
  2. Inspect the wiring harness for damage
  3. Check the voltage in the on-board network
  4. Flash or replace PCM
  5. Diagnosis by a specialist

Related codes

P1605P1606P1608

Error P1607 by Vehicle Brand

AcuraBMWBuickCadillacChevroletGMGMCHondaInfinitiJaguarOldsmobileSaturnVolkswagen

FAQ

What does the P1607 code mean?

P1607 is an OBD-II diagnostic trouble code that indicates: Powertrain Control Module Internal Circuit Malfunction

What causes a P1607 error code?

The most common causes of P1607 include: Malfunction of PCM internal circuits; Problems with module power or grounding; Short circuit in wiring harness; Voltage surges in the on-board network.

How do I fix a P1607 diagnostic trouble code?

To fix P1607: Check PCM power and ground. Inspect the wiring harness for damage. Check the voltage in the on-board network. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1607?

Do not drive — repair immediately

How much does it cost to fix P1607?

The estimated repair cost for P1607 is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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