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P0685

Overview

Code

P0685

Code Type

P

Code Class

P0

System

Engine

Severity Level

High

Emissions Related

false

Drivability Impact

Major

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0685 indicates a malfunction in the engine control module (ECM) cooling fan control circuit

Symptoms

Engine overheating Poor engine performance

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Cooling fan control system

Possible Causes

Faulty cooling fan relay Cooling fan malfunction

Diagnostic Steps

1 Inspect cooling fan relay 2 Test cooling fan control circuit

Drive Safety Notes

Cooling system issues can cause the engine to overheat

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