Engine-Codes - Isuzu - P0126 ISUZU

P0126 ISUZU - Insufficient Coolant Temperature for Stable Operation

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P0126 ISUZU Possible 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

How is the P0126 ISUZU code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P0126 ISUZU code

Labor: 1.0

The cost to diagnose the P0126 ISUZU code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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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.

Possible Symptoms

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

P0126 ISUZU Meaning

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.

More Information

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