OBDII Code List

P2602 CADILLAC - Auxiliary Coolant Pump Circuit Low

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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P2602 CADILLAC Possible Causes

  • Faulty Auxiliary Coolant Pump Relay
  • Blocked pump control passage
  • Faulty Auxiliary Coolant Pump
  • Auxiliary Coolant Pump harness is open or shorted
  • Auxiliary Coolant Pump circuit poor electrical connection

First diagnose P2602 CADILLAC code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

Cost of diagnosing the P2602 CADILLAC code

    Labor: 1.0

    The cost of diagnosing the P2602 CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

P2602 CADILLAC Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P2602 Cadillac Description

The auxiliary coolant pump and cooling fan system provides a measure of prevention against fuel vaporization due to excessive engine temperatures. The Engine Control Module (ECM) commands the auxiliary or after boil coolant pump ON when the engine coolant temperature exceeds a calibrated value after engine shut down. The ECM applies ground to the coil side of the auxiliary pump relay. This energizes the coil and applies voltage directly to the pump motor through the switch side of the relay. When the auxiliary coolant pump is activated, coolant is drawn from radiator and pumped into the engine through a tee in the engine coolant inlet pipe. As the colder temperature coolant is drawn into the engine warmer coolant is expelled from the engine and back to the radiator. Removing high temperature coolant from the engine after shut down helps prevent vaporization of the fuel that remains in the fuel injectors and fuel rail during a hot soak.
OBDII Code P2602 Cadillac - Auxiliary Coolant Pump Circuit Low -

P2602 CADILLAC More Information

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