P2602 Fault Code

Coolant Pump Control Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2602 fault code indicates an issue with the coolant pump control circuit, specifically a low voltage condition. This code is triggered when the engine control module (ECM) detects that the voltage in the coolant pump circuit is lower than expected, which can affect the performance of the cooling system and lead to engine overheating.

What are the symptoms of the P2602 code?

Symptoms associated with the P2602 code may include:

• Overheating engine
• Poor engine performance
• Illumination of the check engine light
• Reduced efficiency of the cooling system
• Erratic engine operation due to temperature irregularities

What causes the P2602 code?

Common causes for the P2602 code include:

• Faulty coolant pump
• Electrical issues such as damaged wiring or connectors
• Short circuits in the coolant pump circuit
• Faulty engine control module (ECM) or software issues
• Low coolant levels affecting pump operation

How to fix P2602?

To resolve code P2602, follow these steps:

• Inspect the coolant pump for any visible signs of damage or wear.
• Check the wiring and connectors leading to the coolant pump for any signs of fraying, corrosion, or disconnection.
• Test the voltage at the coolant pump connector to ensure it matches specifications.
• Replace the coolant pump if it is faulty or not functioning correctly.
• Clear the fault code from the ECM and perform a test drive to see if the code reappears.