P2609 OBD II Trouble Code Intake Air Heater System Performance

How to diagnose, repair, and info on symptoms and causes of a P2609 engine code which applies to diesel vehicles with an air intake heater. This DTC indicates a system performance problem. Also includes links to relevant forum discussions on the code.

Symptoms of P2609 OBD II Trouble Code

Common Causes of P2609 OBD II Trouble Code

Severity of P2609 OBD II Trouble Code

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