P1115 GMC Code - Engine Coolant Temperature Sensor Circuit Intermittent High Voltage
Quick Answer
The Engine Coolant Temperature (ECT) sensor contains a semiconductor device which changes resistance based on temperature (a thermistor). Common causes include Faulty Engine Coolant Temperature (ECT) sensor, Low engine coolant level, Engine Coolant Temperature (ECT) sensor harness is open or shorted. 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
- P1115 GMC indicates Engine Coolant Temperature Sensor Circuit Intermittent High Voltage.
- Common causes
- Common causes include Faulty Engine Coolant Temperature (ECT) sensor, Low engine coolant level, Engine Coolant Temperature (ECT) sensor harness is open or shorted.
- 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 P1115 GMC Description
When the engine coolant is cold, the sensor (thermistor) resistance is high, and the PCMs signal voltage is only pulled down a small amount through the sensor to ground. The PCM senses a high signal voltage (low temperature). When the engine coolant is warm, the sensor resistance is low, and the signal voltage is pulled down a greater amount. This causes the PCM to sense a low signal voltage (high temperature).
What are the Possible Causes of the DTC P1115 GMC?
- Faulty Engine Coolant Temperature (ECT) sensor
- Low engine coolant level
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
- Faulty engine coolant thermostat
How to Fix the DTC P1115 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 P1115 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 P1115 GMC code?
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Frequently Asked Questions about P1115 GMC Code
1. What are the common symptoms of OBDII code P1115 in a GMC vehicle?
The common symptoms of P1115 include engine overheating, poor fuel economy, rough idling, and illumination of the Check Engine Light.
2. What usually causes the P1115 code to trigger in a GMC vehicle?
The P1115 code is typically triggered by a faulty engine coolant temperature sensor, corroded wiring or connectors, or issues with the sensor circuit's voltage.
3. How can I diagnose the cause of the P1115 code in my GMC vehicle?
To diagnose the P1115 code, you can use a scan tool to check the coolant temperature sensor's readings, inspect the sensor and its wiring for any damage, and test the circuit for proper voltage.
4. Can a faulty thermostat cause the P1115 code to appear in a GMC vehicle?
Yes, a faulty thermostat can cause temperature-related issues that may trigger the P1115 code. It's recommended to inspect and test the thermostat along with the coolant temperature sensor.
5. What are the repair options for resolving the P1115 code in a GMC vehicle?
Repair options for the P1115 code include replacing the engine coolant temperature sensor, repairing or replacing damaged wiring or connectors, and ensuring the proper functioning of the cooling system.
6. Will driving with the P1115 code present cause any further damage to my GMC vehicle?
Continuing to drive with the P1115 code present can potentially lead to engine overheating, reduced fuel efficiency, and other related issues. It's best to address the code promptly to prevent further damage.
7. How much does it typically cost to repair the P1115 code in a GMC vehicle?
The cost of repairing the P1115 code can vary depending on the specific cause of the issue, the labor rates in your area, and whether you choose to address the problem yourself or take it to a professional mechanic.
8. Can I reset the Check Engine Light after fixing the issue causing the P1115 code in my GMC vehicle?
Yes, once you have fixed the underlying problem triggering the P1115 code, you can reset the Check Engine Light using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.
9. How urgent is it to address the P1115 code in a GMC vehicle?
It is recommended to address the P1115 code promptly to avoid potential engine overheating and other related issues that can arise from a malfunctioning engine coolant temperature sensor.
10. Is the P1115 code specific to GMC vehicles, or can it occur in other makes and models?
While the P1115 code is associated with GMC vehicles, similar issues related to the engine coolant temperature sensor circuit can occur in other makes and models, triggering equivalent OBDII codes.
Discuss the causes and fixes for P1115 GMC OBDII Code
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