P2600 OBD-II Trouble Code: Coolant Pump Control Circuit/Open

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2600 code

P2600 is a diagnostic trouble code (DTC) for "Coolant Pump Control Circuit/Open". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P2600 DIAGNOSTIC Get a fair and transparent estimate upfront

P2600 code definition

The P2600 trouble code detects an error with the auxiliary coolant pump control circuit.

What the P2600 code means

The P2600 code is a generic OBD-II trouble code that notes a circuit error with the auxiliary coolant pump. The coolant pump control circuit is closely monitored by the powertrain control module (PCM), and numerous other control modules, such as the transmission control module, fuel injection control module, and body control module. When the PCM or an accompanying control module detects a coolant pump control circuit malfunction, then the P2600 trouble code will be triggered.

What causes the P2600 code?

The P2600 trouble code is usually the result of a faulty coolant pump control relay. However, the code can also be caused by damaged electrical components (such as wires, connectors, fuses, and harnesses) in the controller area network (CAN) bus, a broken ground wire, or a loose control module ground strap. While rare, the code can also be caused by a malfunctioning PCM or CAN bus.

What are the symptoms of the P2600 code?

When the P2600 trouble code is detected, the check engine soon Warning Light will likely illuminate on the instrument panel. The vehicle may also experience a diminished heater efficiency, as well as an overheating engine.

How does a mechanic diagnose the P2600 code?

The P2600 code will be diagnosed with the help of a standard OBD-II trouble code scanner. A certified technician will look at the freeze frame data to assess the P2600 code, and to check for the presence of other trouble codes. If the mechanic notes that multiple trouble codes are present, then they will need to be addressed in the order in which they appear on the scanner. The trouble codes will then be reset, and the vehicle restarted, so the mechanic can see if the P2600 code remains detected. If not, then an intermittent error, or possibly an erroneous trigger is the likely cause of the code.

If the code remains detected, then the mechanic will visually inspect the electrical components in the CAN bus. If any fuses are blown, connectors are open or corroded, or wires are shorted, then they will need to be replaced. The ground wire and ground strap will then be tested, and finally the coolant pump control relay should be inspected.

If these inspections yield no results, then a specialized CAN scanner can be hooked up. This diagnostic scanner will help the mechanic inspect the control modules, and pinpoint where the issue is originating.

After any component is replaced, the mechanic will halt the inspection, reset the trouble codes, restart the vehicle, and check for the P2600 code. By doing this, the technician will be alerted as soon as the issue is resolved.

Common mistakes when diagnosing the P2600 code

The most commonly made errors when diagnosing the P2600 code come from a failure to properly comply with the OBD-II diagnosis protocol. Mechanics should follow the protocol step by step at all times, as this helps ensure thorough and efficient inspections, and avoid erroneous repairs.

It is very common for the P2600 code to be joined by numerous other trouble codes. These codes may be in response to a communication issue created by the P2600 code. If the codes are not addressed in the order in which they appear, unnecessary inspections and replacements may take place.

How serious is the P2600 code?

A vehicle with the P2600 trouble code will still be drivable, though the engine may overheat, which can cause damage. Because of this, the vehicle should be inspected and repaired as soon as the code is detected.

What repairs can fix the P2600 code?

Fixes for the P2600 trouble code are:

Additional comments for consideration regarding the P2600 code

It is very uncommon for the P2600 trouble code to signal a defective PCM or CAN bus, so all potential causes should be inspected before PCM or CAN bus failure is presumed. If either of these need to be replaced, they will also need to be reprogrammed.

Need help with a P2600 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

OBD-II
trouble codes
P2600

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2600 code.

SCHEDULE P2600 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


Related questions

Check Engine Light is on and I am getting codes P2600, P22aa, and P24aa
Hello. The codes you have provided are related to the engine and emissions systems. P2600 (https://www.yourmechanic.com/article/p2600-obd-ii-trouble-code-coolant-pump-control-circuit-open-by-brady-klopfer) appears to be related to an issue with the engine's coolant pump circuit. This model of vehicle uses an electric water pump. The computer...

More related articles

P0646 OBD-II Trouble Code: A/C Clutch Relay Control Circuit Low
P0646 Code means The PCM has registered a fault in the A/C clutch relay control circuit due to a defective control relay or driver, or faulty wiring.
B1954 OBD-II Trouble Code: Seat Front Up/Down Potentiometer Feedback Circuit Failure
B1954 means there is a circuit failure related to one of the front seat's potentiometers, likely due to faulty wiring.
B1978 OBD-II Trouble Code: Passenger’s Front Seat Down Switch Circuit Short to Battery
B1978 means there is a circuit error in the passenger front seat down switch, likely due to defective electrical components or a faulty switch.

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com