P00EC 2017 GMC Sierra Code - Intake Air Temperature Sensor 3 Circuit Erratic
Quick Answer
The Intake Air Temperature (IAT) Sensor 3 is a variable resistor that changes an Engine Control Module (ECM) supplied 5 V signal. Common causes include Faulty Intake Air Temperature (IAT) Sensor 3 (Integrated with the Intake Manifold Pressure and Air Temperature Sensor), Intake Air Temperature Sensor 3 harness is open or shorted, Intake Air Temperature Sensor 3 circuit poor electrical connection. 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
- P00EC 2017 GMC Sierra indicates Intake Air Temperature Sensor 3 Circuit Erratic.
- Common causes
- Common causes include Faulty Intake Air Temperature (IAT) Sensor 3 (Integrated with the Intake Manifold Pressure and Air Temperature Sensor), Intake Air Temperature Sensor 3 harness is open or shorted, Intake Air Temperature Sensor 3 circuit poor electrical connection.
- 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 P00EC 2017 GMC Sierra Description
What are the Possible Causes of the DTC P00EC 2017 GMC Sierra?
- Faulty Intake Air Temperature (IAT) Sensor 3 (Integrated with the Intake Manifold Pressure and Air Temperature Sensor)
- Intake Air Temperature Sensor 3 harness is open or shorted
- Intake Air Temperature Sensor 3 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P00EC 2017 GMC Sierra?
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 P00EC 2017 GMC Sierra 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.
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Frequently Asked Questions about P00EC 2017 GMC Sierra Code
1. What does the OBDII code P00EC mean on a 2017 GMC Sierra?
P00EC indicates an issue with the Intake Air Temperature (IAT) Sensor 3 Circuit, where the signal is erratic or outside the expected range.
2. What are the common symptoms of code P00EC?
Symptoms may include a check engine light, poor fuel economy, rough idling, reduced engine performance, or difficulty starting the vehicle.
3. What causes the P00EC code to appear?
Common causes include a faulty IAT Sensor 3, damaged wiring or connectors, a malfunctioning mass airflow (MAF) sensor, or issues with the engine control module (ECM).
4. Can I still drive my GMC Sierra with the P00EC code?
While the vehicle may still be drivable, prolonged use with this code can lead to reduced engine performance and potential damage to other components.
5. How do I diagnose the P00EC code?
Start by inspecting the IAT Sensor 3 and its wiring for damage. Use a scan tool to monitor live data from the sensor and compare it to expected temperature values.
6. How do I fix the P00EC code on my 2017 GMC Sierra?
Repairs may involve replacing the IAT Sensor 3, repairing damaged wiring or connectors, cleaning the MAF sensor, or reprogramming the ECM if necessary.
7. Where is the IAT Sensor 3 located on the 2017 GMC Sierra?
The IAT Sensor 3 is typically integrated into the intake manifold or air intake system. Consult the vehicle’s service manual for the exact location.
8. How much does it cost to repair the P00EC code?
Repair costs can range from $50 to $300 depending on the issue, such as replacing the sensor or addressing wiring problems.
9. Can a dirty air filter cause the P00EC code?
A clogged or dirty air filter can indirectly affect intake air temperature readings, but it’s not a direct cause of this code. Cleaning or replacing the filter is recommended during diagnosis.
10. Will resetting the code fix the P00EC issue?
Resetting the code may temporarily clear the check engine light, but the underlying issue must be addressed to prevent the code from returning.
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