OBD Guide
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P1587

CAN Communication Error MT/AT Recognition Error

P1587 is an OBD-II diagnostic trouble code meaning: CAN Communication Error MT/AT Recognition Error. Common causes: damage to can bus wiring, transmission control module malfunction. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • The Check Engine light comes on
  • Gear shifting problems
  • Reduced engine power
  • Incorrect operation of the gearbox
  • Possible transition to emergency mode

Causes

  • Damage to CAN bus wiring
  • Transmission control module malfunction
  • Problems with the engine ECU
  • Corrosion or poor contact in connectors
  • Software error in modules

How to Fix

  1. Check the integrity of the CAN bus wiring
  2. Diagnose the transmission control module
  3. Check connections and connectors
  4. Update ECU software
  5. Check the engine ECU for errors

Related codes

P1588P1589U0100

Error P1587 by Vehicle Brand

BuickCadillacChevroletChryslerFordGMGMCLincolnMercuryOldsmobileSaturnVolkswagen

FAQ

What does the P1587 code mean?

P1587 is an OBD-II diagnostic trouble code that indicates: CAN Communication Error MT/AT Recognition Error

What causes a P1587 error code?

The most common causes of P1587 include: Damage to CAN bus wiring; Transmission control module malfunction; Problems with the engine ECU; Corrosion or poor contact in connectors.

How do I fix a P1587 diagnostic trouble code?

To fix P1587: Check the integrity of the CAN bus wiring. Diagnose the transmission control module. Check connections and connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1587?

Limited driving only, diagnose soon

How much does it cost to fix P1587?

The estimated repair cost for P1587 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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