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AutoCodes - Generic - P0126

P0126 Code - Insufficient Coolant Temperature for Stable Operation

- Code Popularity: 45,985 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0126?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Low engine coolant level
  • Leaking or stuck open thermostat
  • Faulty Engine Coolant Temperature (ECT) sensor
  • Engine Coolant Temperature (ECT) sensor harness is open or shorted
  • Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
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How to Fix the DTC P0126?

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 P0126 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.

When is the Code Detected?

The voltage sent to Engine Control Module (ECM) from the sensor is not practical, even when some time has passed after starting the engine.

What are Code Possible Symptoms?

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

Code P0126 Description

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

OBDII Code P0126 - Insufficient Coolant Temperature for Stable Operation - AutoCodes.com
P0126 Code - Insufficient Coolant Temperature for Stable Operation

Need More Information on the Code?

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Information for Specific Makes

  • P0126 Isuzu Insufficient Coolant Temperature for Stable Operation
  • P0126 Mazda Coolant Thermostat Condition Low Operating Temperature
  • P0126 Mercedes-Benz Insufficient Coolant Temperature for Stable Operation
  • P0126 Subaru Insufficient Coolant Temperature for Stable Operation

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Code P0126 comments

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