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P26A7 Code - Engine Coolant Bypass Valve Position Sensor Circuit High

- Code Popularity: 8,299 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P26A7?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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
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How to Fix the DTC P26A7?

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

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P26A7 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P26A7 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 P26A7 - Engine Coolant Bypass Valve Position Sensor Circuit High - AutoCodes.com
P26A7 Code - Engine Coolant Bypass Valve Position Sensor Circuit High

Need More Information on the Code?

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Information for Specific Makes

  • P26A7 Buick Engine Coolant Bypass Valve Position Sensor Circuit High
  • P26A7 Cadillac Engine Coolant Bypass Valve Position Sensor Circuit High
  • P26A7 Chevrolet Engine Coolant Bypass Valve Position Sensor Circuit High
  • P26A7 Dodge Engine Coolant Bypass Valve Position Sensor Circuit High
  • P26A7 GMC Engine Coolant Bypass Valve Position Sensor Circuit High

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Code P26A7 comments

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