EV Diagnostics
Source-backed diagnostic reference

P1656 EV diagnostic code

Automatic Transmission System Malfunction

Reference status: This page preserves source-backed code definitions for discovery. Manufacturer/model applicability, repair steps and safety conclusions are not treated as verified unless a manufacturer-specific verified report is available.

Reference definitions

  • ACURA: Automatic Transmission System Malfunction Source
  • BUICK: Driver 2 Line 6 Source
  • CADILLAC: Driver 2 Line 6 Source
  • CHEVY: Driver 2 Line 6 Source
  • FORD: CAN Link PCM PCM Circuit Network Source
  • GEO: Intake CMP Actuator Solenoid Control Circuit Source
  • GM: Driver 2 Line 6 Source
  • GMC: Driver 2 Line 6 Source
  • HONDA: Automatic Transmission System Malfunction Source
  • INFINITI: Automatic Transmission System Malfunction Source
  • LEXUS: OCV Circuit Malfunction Bank 1 Source
  • LINCOLN: CAN Link PCM PCM Circuit Network Source
  • MERCURY: CAN Link PCM PCM Circuit Network Source
  • OLDSMOBILE: Driver 2 Line 6 Source
  • SATURN: Driver 2 Line 6 Source
  • TOYOTA: OCV Circuit Source
  • VOLKSWAGEN: A/C Clutch Relays Circuit Short To Ground Source

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