AutoCodes – Chevrolet – P2600 Chevrolet

P2600 Chevrolet Code - Auxiliary Coolant Pump Circuit/Open

Quick Answer

The auxiliary coolant pump and cooling fan system provides a measure of prevention against fuel vaporization due to excessive engine temperatures. Common causes include Faulty Auxiliary Coolant Pump Relay, Blocked pump control passage, Faulty Auxiliary Coolant Pump. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P2600 Chevrolet indicates Auxiliary Coolant Pump Circuit/Open.
Common causes: Common causes include Faulty Auxiliary Coolant Pump Relay, Blocked pump control passage, Faulty Auxiliary Coolant Pump.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,691

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2600 Chevrolet 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 P2600 Chevrolet - Auxiliary Coolant Pump Circuit/Open - AutoCodes.com — P2600 Chevrolet Code - Auxiliary Coolant Pump Circuit/Open

What does this mean?

What are the Possible Causes of the DTC P2600 Chevrolet?

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

How to Fix the DTC P2600 Chevrolet?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2600 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need more information on how to fix the P2600 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2600 Chevrolet code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2600 Chevrolet Code

1. What are the common symptoms of OBDII code P2600 in a Chevrolet related to the Auxiliary Coolant Pump Circuit/Open?

- Common symptoms include the check engine light coming on, engine overheating, and potential loss of cabin heat in colder weather.

2. What can cause the OBDII code P2600 to trigger in a Chevrolet?

- The code can be triggered by issues such as a faulty auxiliary coolant pump, a damaged wiring harness, a blown fuse, or a malfunctioning coolant pump relay.

3. How can I diagnose the cause of OBDII code P2600 in my Chevrolet?

- Diagnosing the issue involves checking the auxiliary coolant pump and related components for proper operation, inspecting the wiring for any damage, and testing the coolant pump relay and fuse.

4. Can I continue to drive my Chevrolet with OBDII code P2600 present?

- It is not recommended to drive the vehicle with the code active, as it can lead to engine overheating and potential damage. It's best to address the issue promptly.

5. How can I repair OBDII code P2600 in a Chevrolet with an Auxiliary Coolant Pump Circuit/Open?

- Repair options include replacing the faulty auxiliary coolant pump, repairing or replacing damaged wiring, checking and replacing the fuse if necessary, and testing or replacing the coolant pump relay.

6. Is it possible to reset the OBDII code P2600 in a Chevrolet without fixing the issue?

- While clearing the code without addressing the underlying problem may temporarily turn off the check engine light, the issue causing the code will persist and likely trigger the code again.

7. Are there any preventive measures to avoid OBDII code P2600 in a Chevrolet?

- Regular maintenance and inspection of the cooling system, including the auxiliary coolant pump and related components, can help prevent issues that may lead to the code being triggered.

8. Can a malfunctioning coolant temperature sensor cause OBDII code P2600 in a Chevrolet?

- While a faulty coolant temperature sensor can cause related issues, OBDII code P2600 specifically relates to problems with the auxiliary coolant pump circuit and is not directly caused by the temperature sensor.

9. How long does it typically take to repair OBDII code P2600 in a Chevrolet?

- The repair time can vary based on the exact cause of the issue and the availability of parts. In general, repairs for this code can range from a quick fix to a more involved process, taking anywhere from an hour to several hours.

10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P2600 in a Chevrolet?

- Depending on the specific cause of the code, some DIY enthusiasts with basic automotive knowledge may be able to address the issue by following repair guides or tutorials. However, if unsure, it's always best to consult a professional mechanic.