P0119 GMC Code - Engine Coolant Temperature Circuit Intermittent
Quick Answer
The Engine Coolant Temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. Common causes include Low engine coolant level, Leaking or stuck open thermostat, Faulty Engine Coolant Temperature (ECT) sensor. 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
- P0119 GMC indicates Engine Coolant Temperature Circuit Intermittent.
- Common causes
- Common causes include Low engine coolant level, Leaking or stuck open thermostat, Faulty Engine Coolant Temperature (ECT) sensor.
- 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 P0119 GMC Description
The ECM uses this high side coolant rationality diagnostic to determine if the input from the ECT sensor is skewed warmer than normal. The internal clock of the ECM will record the amount of time the ignition is OFF. If the calibrated ignition OFF time is met at start-up, the ECM will compare the temperature difference between the ECT and the intake air temperature (IAT) to determine if the temperatures are within an acceptable operating range of each other. The Diagnostic Trouble Code (DTC) will be set when the ECM detects a the ECT is Intermittent for greater than 3 s.
What are the Possible Causes of the DTC P0119 GMC?
- Low engine coolant level
- Leaking or stuck open thermostat
- Faulty Engine Coolant Temperature (ECT) sensor
- Engine Coolant Temperature sensor harness is open or shorted
- Engine Coolant Temperature sensor electrical circuit poor connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0119 GMC?
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 P0119 GMC 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 P0119 GMC code?
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Need Help with the Code?
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Information for Specific GMC Models
- P0119 2014 GMC Sierra — Engine Coolant Temperature Circuit Intermittent
- P0119 2015 GMC Sierra — Engine Coolant Temperature Circuit Intermittent
- P0119 2016 GMC Sierra — Engine Coolant Temperature Circuit Intermittent
- P0119 2017 GMC Sierra — Engine Coolant Temperature Circuit Intermittent
- P0119 2018 GMC Sierra — Engine Coolant Temperature Circuit Intermittent
Frequently Asked Questions about P0119 GMC Code
1. What are the common symptoms of OBDII code P0119 GMC?
- Common symptoms include fluctuating engine temperature readings, engine overheating, poor fuel economy, and potential stalling or rough idling.
2. What are the possible causes of an intermittent Engine Coolant Temperature Circuit issue (P0119) in a GMC vehicle?
- Possible causes include a faulty engine coolant temperature sensor, damaged wiring or connectors in the circuit, low coolant levels, or a malfunctioning cooling system.
3. How can I diagnose the cause of OBDII code P0119 in my GMC vehicle?
- You can start by checking the coolant level, inspecting the wiring and connectors for damage, testing the engine coolant temperature sensor, and using a scan tool to monitor temperature readings.
4. What are some repair tips for addressing an intermittent Engine Coolant Temperature Circuit issue in a GMC vehicle?
- Repair tips include replacing a faulty coolant temperature sensor, repairing damaged wiring or connectors, ensuring proper coolant levels, and flushing the cooling system if necessary.
5. Can driving with OBDII code P0119 in a GMC vehicle cause further damage?
- Continuing to drive with this code may lead to engine overheating, potential damage to engine components, reduced fuel efficiency, and increased emissions.
6. How long does it typically take to repair an Engine Coolant Temperature Circuit issue causing OBDII code P0119?
- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 1 to 3 hours for diagnosis and repair.
7. Is it safe to drive my GMC vehicle with OBDII code P0119 if the engine temperature appears normal?
- It is not recommended to drive with this code present, as it can lead to potential issues such as inaccurate temperature readings and engine performance problems.
8. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P0119 in a GMC vehicle?
- Depending on the cause, a DIY enthusiast may be able to address this code by replacing the coolant temperature sensor or checking and repairing wiring issues.
9. Are there any preventive measures to avoid OBDII code P0119 in a GMC vehicle?
- Regularly checking coolant levels, performing cooling system maintenance, and addressing any temperature-related issues promptly can help prevent this code from occurring.
10. Will resetting the OBDII system clear the P0119 code in a GMC vehicle?
- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not fixed, the code is likely to reappear.
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