EV Diagnostics
Source-backed diagnostic reference

P1620 EV diagnostic code

MAP Cooling Control Circuit Signal High

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: MAP Cooling Control Circuit Signal High Source
  • BUICK: Low Coolant Circuit Source
  • CADILLAC: Low Coolant Circuit Source
  • CHEVY: Low Coolant Circuit Source
  • GM: Low Coolant Circuit Source
  • GMC: Low Coolant Circuit Source
  • OLDSMOBILE: Low Coolant Circuit Source
  • OTHER: SBDS Interactive Codes Source
  • SATURN: Low Coolant Circuit Source
  • VOLKSWAGEN: Engine Coolant Temperature Signal Open Short To B+ Source

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