OBD Guide
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U1501

Implausible Message Data Length Received From ECM/PCM

U1501 is an OBD-II diagnostic trouble code meaning: Implausible Message Data Length Received From ECM/PCM. Common causes: ecm or pcm malfunction, damage to wiring or connectors in the can network. Estimated repair cost: ~$278.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
~$278 (est.)

Symptoms

  • Check Engine light comes on
  • Unstable engine operation
  • Shifting problems (if equipped with PCM)
  • Engine power limitation
  • Errors in other vehicle systems

Causes

  • ECM or PCM malfunction
  • Damage to wiring or connectors in the CAN network
  • Software error in control module
  • Problems with module power supply
  • Short circuit in the CAN network

How to Fix

  1. Check error codes in other modules
  2. Diagnose the CAN bus for breaks and short circuits
  3. Check ECM/PCM power supply and grounding
  4. Update ECM/PCM software
  5. Replace ECM/PCM if necessary

Related codes

U1500U1502U0100

FAQ

What does the U1501 code mean?

U1501 is an OBD-II diagnostic trouble code that indicates: Implausible Message Data Length Received From ECM/PCM

What causes a U1501 error code?

The most common causes of U1501 include: ECM or PCM malfunction; Damage to wiring or connectors in the CAN network; Software error in control module; Problems with module power supply.

How do I fix a U1501 diagnostic trouble code?

To fix U1501: Check error codes in other modules. Diagnose the CAN bus for breaks and short circuits. Check ECM/PCM power supply and grounding. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1501?

Limited driving only, diagnose soon

How much does it cost to fix U1501?

The estimated repair cost for U1501 is ~$278. Actual cost depends on your vehicle, location, and labor rates.

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