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P0596

Overview

Code

P0596

Code Type

P

Code Class

P0

System

Engine

Severity Level

High

Emissions Related

true

Drivability Impact

Major

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0596 indicates a thermostat stuck closed

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

Thermostat system

Possible Causes

Sticking thermostat

Diagnostic Steps

1 Inspect thermostat for proper function 2 Test coolant flow

Drive Safety Notes

Increased risk of overheating

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