P0118 Chrysler Code - Engine Coolant Temperature Sensor Circuit High
Quick Answer
The P0118 code for Chrysler vehicles indicates that there is a problem with the engine coolant temperature sensor circuit registering a high voltage. Common causes include Faulty engine coolant temperature sensor: The sensor itself may be malfunctioning, causing it to send incorrect voltage signals to the ECM, Wiring issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the signal and trigger the P0118 code, Coolant level: Low coolant levels can affect the sensor's ability to accurately measure the temperature of the coolant. 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 Chrysler indicates Engine Coolant Temperature Sensor Circuit High.
- Common causes
- Common causes include Faulty engine coolant temperature sensor: The sensor itself may be malfunctioning, causing it to send incorrect voltage signals to the ECM, Wiring issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the signal and trigger the P0118 code, Coolant level: Low coolant levels can affect the sensor's ability to accurately measure the temperature of the coolant.
- 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.
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Code P0118 Chrysler Description
The P0118 code for Chrysler vehicles indicates that there is a problem with the engine coolant temperature sensor circuit registering a high voltage. The engine coolant temperature sensor is responsible for monitoring the temperature of the engine coolant and sending this information to the engine control module (ECM). This data is crucial for the ECM to adjust fuel delivery and ignition timing to ensure optimal engine performance and efficiency. When the sensor circuit reads a high voltage, it can lead to inaccurate temperature readings, which may result in poor engine performance, reduced fuel economy, and potential damage to the engine if not addressed promptly.
Common Causes of P0118 Chrysler
- Faulty engine coolant temperature sensor: The sensor itself may be malfunctioning, causing it to send incorrect voltage signals to the ECM.
- Wiring issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the signal and trigger the P0118 code.
- Coolant level: Low coolant levels can affect the sensor's ability to accurately measure the temperature of the coolant.
- Cooling system problems: Issues with the cooling system, such as a stuck thermostat or a malfunctioning water pump, can impact the sensor readings.
Symptoms of P0118 Chrysler
- Engine overheating: A malfunctioning engine coolant temperature sensor can cause the engine to overheat due to incorrect temperature readings.
- Poor fuel economy: Inaccurate temperature readings can lead to improper fuel delivery, resulting in decreased fuel efficiency.
- Rough idling or stalling: The ECM relies on accurate temperature data to adjust engine parameters, so a faulty sensor can cause rough idling or stalling.
- Check Engine Light: The P0118 code will trigger the Check Engine Light on the dashboard to alert the driver of a potential issue.
How to Fix P0118 Chrysler
- Diagnostic scan: Use an OBD-II scanner to retrieve the specific code and determine the cause of the high voltage reading.
- Inspect sensor and wiring: Check the engine coolant temperature sensor for any signs of damage or corrosion, and inspect the wiring for any issues.
- Replace sensor: If the sensor is faulty, replace it with a new one following manufacturer recommendations.
- Check coolant level: Ensure the coolant level is at the appropriate level and top up if necessary.
- Clear codes: Clear the diagnostic trouble codes using the OBD-II scanner after completing the repair to reset the Check Engine Light.
Cost to Fix P0118 Chrysler
The cost of repairing a P0118 engine coolant temperature sensor circuit high code can vary depending on the specific cause of the issue and the labor rates in your area. Generally, replacing the coolant temperature sensor and addressing any related wiring issues can cost between $100 and $300 in parts and labor. Keep in mind that additional costs may apply if there are other underlying problems with the cooling system that need to be addressed. It's advisable to contact local auto repair shops for accurate estimates based on your vehicle make and model.
When is the Code Detected?
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Frequently Asked Questions about P0118 Chrysler Code
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Discuss the causes and fixes for P0118 Chrysler OBDII Code
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Several weeks prior to getting the code I notice engine temp fluctuating far too rapidly to be reality ... 210 - 140 - 210 over about 5 seconds ... the fault confirmed there was an issue. ...working to determine the cause now. ... I also have an issue with rough cold idle, not sure if that is related.
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What model and year is your Chrysler? You could have a faulty Engine Coolant Temperature (ECT) sensor, but you should check the coolant level and leaks first.
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