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2023 CHEVROLET BOLT EUV
65 kWh Single Motor FWD•FWD•AUTOMATIC•ev
🏆Sponsored by Simon-Olivier Ricci
Repairs269Labor314Torque3680Fluid5DTC849Battery1Maintenance0Recalls0
P1651high severityPowertrain

Fan 1 Relay Control Circuit

on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD

What this code means

The PCM detected a fault in the cooling fan 1 relay control circuit. The primary cooling fan may not operate, risking overheating.

Symptoms

  • Engine overheating
  • Cooling fan not running
  • Check engine light on

Common causes

  • Faulty fan relay
  • Wiring or connector fault
  • Short or open in control circuit
  • Faulty PCM

Diagnostic steps

  1. Check fan 1 relay operation
  2. Inspect relay control wiring
  3. Test PCM control signal
  4. Replace relay or repair circuit
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