EV Diagnostics
Source-backed diagnostic reference

P1644 EV diagnostic code

TP Output Circuit

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

  • BUICK: TP Output Circuit Source
  • CADILLAC: TP Output Circuit Source
  • CHEVY: TP Output Circuit Source
  • FORD: Fuel Pump Speed Control Circuit Malfunction Source
  • GM: TP Output Circuit Source
  • GMC: TP Output Circuit Source
  • LINCOLN: Fuel Pump Speed Control Circuit Malfunction Source
  • MERCURY: Fuel Pump Speed Control Circuit Malfunction Source
  • OLDSMOBILE: TP Output Circuit Source
  • OTHER: Fuel Pump Speed Control Circuit Malfunction Source
  • SATURN: TP Output Circuit Source
  • VOLKSWAGEN: Check DTC Memory Of Clutch ECU Source

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