OBD Guide
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P1586

MT/AT Encoding Signal Malfunction

P1586 is an OBD-II diagnostic trouble code meaning: MT/AT Encoding Signal Malfunction. Common causes: transmission position sensor malfunction, transmission wiring harness damage. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Incorrect gear shifting
  • Transmission of the gearbox into emergency mode
  • Check Engine light comes on
  • Reduced engine power
  • Problems starting the engine

Causes

  • Transmission position sensor malfunction
  • Transmission wiring harness damage
  • Problems with the transmission control unit
  • Engine control unit (ECU) malfunction
  • Short circuit or open circuit in the encoding signal circuit

How to Fix

  1. Check the condition of the transmission wiring harness
  2. Check the gearbox position sensor
  3. Check transmission control unit
  4. Check engine control unit (ECU)
  5. Diagnose the encoding signal circuit

Related codes

P0700P0705P1700

Error P1586 by Vehicle Brand

BuickCadillacChevroletChryslerFordGMGMCKiaLincolnMercuryOldsmobileSaturnVolkswagen

FAQ

What does the P1586 code mean?

P1586 is an OBD-II diagnostic trouble code that indicates: MT/AT Encoding Signal Malfunction

What causes a P1586 error code?

The most common causes of P1586 include: Transmission position sensor malfunction; Transmission wiring harness damage; Problems with the transmission control unit; Engine control unit (ECU) malfunction.

How do I fix a P1586 diagnostic trouble code?

To fix P1586: Check the condition of the transmission wiring harness. Check the gearbox position sensor. Check transmission control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1586?

Yes, but get it checked soon

How much does it cost to fix P1586?

The estimated repair cost for P1586 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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