OBD Guide
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P1694

No Messages Received From The Powertrain Control Module

P1694 is an OBD-II diagnostic trouble code meaning: No Messages Received From The Powertrain Control Module. Common causes: control module (pcm) malfunction, broken or damaged can bus wires. Estimated repair cost: $33–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Check Engine Light Is On
  • The car goes into emergency mode
  • Deterioration in dynamics and response to the gas pedal
  • Unstable engine operation
  • Failure of some electronic systems

Causes

  • Control module (PCM) malfunction
  • Broken or damaged CAN bus wires
  • Poor contact in wiring connectors
  • PCM power problems
  • Short circuit in communication circuits

How to Fix

  1. Check the integrity of the CAN bus wiring and connectors
  2. Check PCM power and ground
  3. Scan all modules for communication errors
  4. If necessary, replace the control module
  5. Update module software

Related codes

P1693P1695P1696

Error P1694 by Vehicle Brand

BuickCadillacChevroletChryslerDodgeGMGMCJeepMazdaOldsmobilePlymouthPontiacSaturnVolkswagen

FAQ

What does the P1694 code mean?

P1694 is an OBD-II diagnostic trouble code that indicates: No Messages Received From The Powertrain Control Module

What causes a P1694 error code?

The most common causes of P1694 include: Control module (PCM) malfunction; Broken or damaged CAN bus wires; Poor contact in wiring connectors; PCM power problems.

How do I fix a P1694 diagnostic trouble code?

To fix P1694: Check the integrity of the CAN bus wiring and connectors. Check PCM power and ground. Scan all modules for communication errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1694?

Limited driving only, diagnose soon

How much does it cost to fix P1694?

The estimated repair cost for P1694 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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