P0118 Mercedes-Benz Code - Engine Coolant Temperature Circuit High Input
Quick Answer
The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor, Faulty engine coolant thermostat. 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
- P0118 Mercedes-Benz indicates Engine Coolant Temperature Circuit High Input.
- Common causes
- Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor, Faulty engine coolant thermostat.
- 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.
Code P0118 Mercedes-Benz Description
What are the Possible Causes of the DTC P0118 Mercedes-Benz?
- Low engine coolant level
- Faulty Engine Coolant Temperature (ECT) sensor
- Faulty engine coolant thermostat
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
How to Fix the DTC P0118 Mercedes-Benz?
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 P0118 Mercedes-Benz 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.
Need more information about the P0118 Mercedes-Benz code?
Need more information on how to fix the P0118 Mercedes-Benz code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0118 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0118 Mercedes-Benz Code
1. What are common symptoms of OBDII code P0118 in a Mercedes-Benz?
- Common symptoms include the engine overheating, inaccurate temperature gauge readings, and potential issues with the vehicle's fuel mixture.
2. What are the possible causes of the P0118 code in a Mercedes-Benz?
- Possible causes include a faulty engine coolant temperature sensor, a malfunctioning thermostat, wiring issues, or a problem with the engine control module (ECM).
3. How can I diagnose the cause of the P0118 code in my Mercedes-Benz?
- To diagnose the issue, you can use a scan tool to check the actual coolant temperature readings, visually inspect the sensor and wiring for damage, and test the thermostat for proper operation.
4. Can driving with the P0118 code cause further damage to my Mercedes-Benz?
- Driving with the P0118 code can potentially cause overheating issues, damage to the engine, and reduced fuel efficiency, so it's best to address the issue promptly.
5. How can I reset the P0118 code in my Mercedes-Benz after making repairs?
- You can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes to clear the ECM's memory.
6. Is it safe to continue driving my Mercedes-Benz with the P0118 code present?
- It is not recommended to drive with the P0118 code present, as it can lead to engine overheating and potential damage if left unaddressed.
7. Will replacing the engine coolant temperature sensor fix the P0118 code in my Mercedes-Benz?
- In many cases, replacing the faulty engine coolant temperature sensor can resolve the P0118 code, but it's essential to diagnose the issue accurately to ensure a proper fix.
8. Can a DIY enthusiast repair the P0118 code in a Mercedes-Benz?
- Depending on your skill level and access to tools, DIY enthusiasts may be able to address the P0118 code by replacing the coolant temperature sensor or thermostat themselves.
9. How long does it typically take to repair the P0118 code in a Mercedes-Benz?
- The repair time can vary depending on the exact cause of the P0118 code, but it generally takes between 1 to 2 hours for a professional mechanic to diagnose and fix the issue.
10. Are there any preventive maintenance tips to avoid the P0118 code in a Mercedes-Benz?
- Regularly checking the coolant level, performing cooling system inspections, and replacing the thermostat as recommended can help prevent issues leading to the P0118 code.
Discuss the causes and fixes for P0118 Mercedes-Benz OBDII Code
-
Depends what the problem is. Could be just low coolant level. What model and year is your Mercedes-Benz?
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