Engine-Codes - Mercedes-Benz - P0117 Mercedes-Benz

P0117 Mercedes-Benz Code - Engine Coolant Temperature Circuit Low Input

- Code Popularity: 17,427 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0117 Mercedes-Benz?

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
  • Faulty Engine Coolant Thermostat
  • Faulty Engine Coolant Temperature (ECT) sensor
  • Engine Coolant Temperature sensor harness is open or shorted
  • Engine Coolant Temperature sensor circuit poor electrical connection
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How to Fix the DTC P0117 Mercedes-Benz?

Check 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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P0117 Mercedes-Benz code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the P0117 Mercedes-Benz Code Mean?

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 that is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases. The Diagnostic Trouble Code (DTC) will be set when an excessively low voltage from the sensor is sent to ECM.

P0117 Mercedes-Benz Code - Engine Coolant Temperature Circuit Low Input

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