EV Diagnostics
Source-backed diagnostic reference

P1637 EV diagnostic code

Throttle Valve Position Control Control Deviation

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 Control Deviation Source
  • BUICK: Generator L-Terminal Circuit Source
  • CADILLAC: Generator L-Terminal Circuit Source
  • CHEVY: Generator L-Terminal Circuit Source
  • GM: Generator L-Terminal Circuit Source
  • GMC: Generator L-Terminal Circuit Source
  • JAGUAR: CAN Link ECM ABS Control Module Circuit Network Source
  • OLDSMOBILE: Generator L-Terminal Circuit Source
  • OTHER: Can Link ECM/ABSCM Circuit / Network Malfunction Source
  • SATURN: Generator L-Terminal Circuit Source
  • VOLKSWAGEN: Data Bus Powertrain Missing Message From Central Electronic Control Source

Search and canonical URL

Capitalization, underscores, hyphens, colons and spaces are normalized to this canonical code identity so alternate scan-tool formats do not create duplicate pages.