EV Diagnostics
Source-backed diagnostic reference

P1638 EV diagnostic code

Throttle Valve Position Control Throttle Stuck Temporarily

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

  • BMW: Throttle Valve Position Control Throttle Stuck Temporarily Source
  • BUICK: Generator F-Terminal Circuit Source
  • CADILLAC: Generator F-Terminal Circuit Source
  • CHEVY: Generator F-Terminal Circuit Source
  • GM: Generator F-Terminal Circuit Source
  • GMC: Generator F-Terminal Circuit Source
  • JAGUAR: CAN Link ECM INSTM Circuit Network Source
  • OLDSMOBILE: Generator F-Terminal Circuit Source
  • OTHER: Can Link ECM/INSTM Circuit / Network Malfunction Source
  • SATURN: Generator F-Terminal Circuit Source
  • VOLKSWAGEN: Data Bus Powertrain Missing Message From Clutch Control Source

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