AutoCodes – Chevrolet – P26A6 Chevrolet

P26A6 Chevrolet Code - Engine Coolant Bypass Valve Position Sensor Circuit Low Voltage

Quick Answer

The passenger compartment heater coolant control valve regulates the engine coolant flow into the cabin heater loop depending on engine coolant temperature and ambient temperature conditions. Common causes include Faulty Engine Engine Coolant Bypass Valve Position Sensor, Engine Coolant Bypass Valve Position Sensor harness is open or shorted, Engine Coolant Bypass Valve Position Sensor circuit poor electrical connection. 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: P26A6 Chevrolet indicates Engine Coolant Bypass Valve Position Sensor Circuit Low Voltage.
Common causes: Common causes include Faulty Engine Engine Coolant Bypass Valve Position Sensor, Engine Coolant Bypass Valve Position Sensor harness is open or shorted, Engine Coolant Bypass Valve Position Sensor circuit poor electrical connection.
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 1,540

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jan 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P26A6 Chevrolet Description

The passenger compartment heater coolant control valve regulates the engine coolant flow into the cabin heater loop depending on engine coolant temperature and ambient temperature conditions. The passenger compartment heater coolant control valve has two positions: ByPass or Link. In the ByPass position, the coolant in the engine loop and heater loop are separated and in the link position the coolant circulates through both loops. The valve movement is controlled by a PWM signal. A 50% duty cycle is a normal duty cycle. A 75% duty cycle represents a valve commanded to the link position. A 25% duty cycle represents a valve commanded to the ByPass position. The passenger compartment heater coolant control valve uses an internal position sensor that sends a signal to the hybrid powertrain control module to determine the valve position.
When the engine coolant temperature heats up, a valve learn procedure takes place. The hybrid powertrain control module 2 commands the valve to the link position and records the voltage coming back from the position sensor. Then the hybrid powertrain control module 2 commands the valve back to the bypass position and records the voltage coming back from the position sensor. The voltage values in both the link and bypass positions must fall within calibrated ranges.

OBDII Code P26A6 Chevrolet - Engine Coolant Bypass Valve Position Sensor Circuit Low Voltage - AutoCodes.com — P26A6 Chevrolet Code - Engine Coolant Bypass Valve Position Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P26A6 Chevrolet?

Faulty Engine Engine Coolant Bypass Valve Position Sensor
Engine Coolant Bypass Valve Position Sensor harness is open or shorted
Engine Coolant Bypass Valve Position Sensor circuit poor electrical connection

How to Fix the DTC P26A6 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 P26A6 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 Help with the Code?

Get the P26A6 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 P26A6 Chevrolet Code

1. What are the common symptoms of OBDII code P26A6 in a Chevrolet related to the Engine Coolant Bypass Valve Position Sensor Circuit Low Voltage?

The common symptoms include engine overheating, poor engine performance, illuminated Check Engine light, and potential coolant leaks.

2. What are the possible causes of the P26A6 OBDII code in a Chevrolet?

Possible causes include a malfunctioning bypass valve position sensor, damaged wiring or connectors in the sensor circuit, low coolant levels, or a faulty engine control module (ECM).

3. How can I diagnose the P26A6 code in my Chevrolet?

Diagnosing the code involves using an OBDII scanner to retrieve the trouble codes, inspecting the bypass valve position sensor and its wiring for any visible damage, checking coolant levels, and testing the sensor for proper voltage output.

4. Can I drive my Chevrolet with the P26A6 code present?

It is not recommended to drive the vehicle with the P26A6 code as it can lead to engine overheating and potential damage. It is best to address the issue promptly.

5. How can I repair the Engine Coolant Bypass Valve Position Sensor Circuit Low Voltage issue in my Chevrolet?

Repairing the issue may involve replacing the faulty bypass valve position sensor, repairing damaged wiring or connectors, ensuring proper coolant levels, and clearing the trouble codes with an OBDII scanner.

6. Is it possible to reset the P26A6 OBDII code in a Chevrolet without fixing the underlying issue?

While you can clear the trouble codes with an OBDII scanner, it is crucial to address the root cause of the problem to prevent it from reoccurring and potentially causing further damage.

7. Will the P26A6 code in a Chevrolet cause permanent damage if left unaddressed?

Continuing to drive with the P26A6 code can lead to engine overheating and potential damage, so it is essential to address the issue as soon as possible to prevent permanent damage.

8. Can a DIY enthusiast fix the P26A6 code in a Chevrolet, or is professional assistance required?

Depending on your automotive repair skills and knowledge, you may be able to address the P26A6 code yourself by following repair guides and using the necessary tools. However, if unsure, seeking professional assistance is recommended.

9. Are there any preventive maintenance tips to avoid the P26A6 code in a Chevrolet?

Regularly checking coolant levels, inspecting the bypass valve position sensor and its wiring for any signs of wear, and addressing any cooling system issues promptly can help prevent the occurrence of the P26A6 code.

10. How long does it typically take to repair the P26A6 OBDII code issue in a Chevrolet?

The repair time can vary depending on the exact cause of the problem and the extent of the repair needed. In some cases, it can be resolved within a few hours, while more complex issues may take longer and require professional assistance.