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2012 MERCEDES-BENZ ML
3.5L V6•AWD•AUTOMATIC•gas•M272
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Repairs0Labor492Torque2165Fluid8DTC1852Battery2Maintenance0Recalls0
P1747high severityPowertrain

Electronic Gear Selector CAN Fault

on 2012 Mercedes-Benz ML 3.5L V6 · AWD

What this code means

The ECU detected a CAN bus communication fault with the electronic gear selector module. The gear selector position cannot be reliably communicated to the transmission control module.

Symptoms

  • Transmission may not shift
  • Gear selector position not displayed
  • Check Engine Light
  • Transmission warning light
  • Stuck in Park

Common causes

  • Faulty electronic gear selector module
  • CAN bus wiring fault
  • CAN bus termination issue
  • Transmission control module fault
  • Corroded CAN bus connector

Diagnostic steps

  1. Check CAN bus communication with diagnostic tool
  2. Test CAN High and CAN Low signals
  3. Inspect gear selector module connector
  4. Test CAN bus termination resistance
  5. Check for other CAN-related faults

Repair notes

Replace the electronic gear selector module or repair CAN bus wiring.

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