AutoCodesGMC – P00E9 GMC

P00E9 GMC Code - Intake Air Temperature Sensor 3 Circuit Performance

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
P00E9 GMC indicates Intake Air Temperature Sensor 3 Circuit Performance.
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.
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Code Popularity 467
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 17, 2022
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Code P00E9 GMC Description

The Intake Air Temperature (IAT) Sensor 3 is a variable resistor that changes an Engine Control Module (ECM) supplied 5 V signal. The signal varies with intake manifold air temperature and is displayed by the scan tool as °C (°F). The IAT sensor 3 is integrated with the Manifold Absolute Pressure Sensor in the intake manifold. The ECM provides a ground for the IAT sensor 3 low reference circuit. The Diagnostic Trouble Code (DTC) will be set when the ECM determines the absolute difference between IAT sensor 1 start-up temperature and the IAT sensor 2 start-up temperature that is not at factory specifications.
OBDII Code P00E9 GMC - Intake Air Temperature Sensor 3 Circuit Performance - AutoCodes.com
P00E9 GMC Code - Intake Air Temperature Sensor 3 Circuit Performance

What are the Possible Causes of the DTC P00E9 GMC?

  • 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 P00E9 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 P00E9 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 P00E9 GMC code?

Need more information on how to fix the P00E9 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific GMC Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P00E9 GMC Code

1. What are the common symptoms of OBDII code P00E9 GMC related to the Intake Air Temperature Sensor 3 Circuit Performance?

The common symptoms include poor engine performance, reduced fuel efficiency, and potentially stalling or rough idling.

2. What are the possible causes of OBDII code P00E9 GMC indicating Intake Air Temperature Sensor 3 Circuit Performance?

Possible causes include a faulty intake air temperature sensor, damaged wiring or connectors, or issues with the engine control module.

3. How can I diagnose OBDII code P00E9 GMC related to the Intake Air Temperature Sensor 3 Circuit Performance?

Diagnosis involves using a scan tool to read the code, checking the intake air temperature sensor and its wiring for damage, and testing the sensor's resistance.

4. Can a dirty air filter trigger OBDII code P00E9 GMC for Intake Air Temperature Sensor 3 Circuit Performance?

A dirty air filter may indirectly contribute to the code by affecting the intake air temperature readings, but it is not a direct cause of the sensor circuit performance issue.

5. Is it safe to drive with OBDII code P00E9 GMC linked to Intake Air Temperature Sensor 3 Circuit Performance?

It is generally not recommended to drive with this code present, as it can lead to further engine problems and potential safety issues due to poor performance.

6. How can I repair OBDII code P00E9 GMC for Intake Air Temperature Sensor 3 Circuit Performance?

Repair may involve replacing the intake air temperature sensor, repairing or replacing damaged wiring or connectors, or reprogramming the engine control module.

7. Will resetting the OBDII code P00E9 GMC related to Intake Air Temperature Sensor 3 Circuit Performance make it go away permanently?

Simply resetting the code may temporarily clear it, but if the underlying issue is not addressed, the code is likely to return after driving the vehicle again.

8. Can extreme weather conditions trigger OBDII code P00E9 GMC for Intake Air Temperature Sensor 3 Circuit Performance?

Extreme weather conditions can sometimes affect sensor readings, but if the code persists in normal conditions, there is likely an actual issue with the sensor circuit performance.

9. How long does it typically take to repair OBDII code P00E9 GMC associated with Intake Air Temperature Sensor 3 Circuit Performance?

The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 30 minutes to a few hours to diagnose and fix the problem.

10. Is it necessary to visit a mechanic for OBDII code P00E9 GMC related to Intake Air Temperature Sensor 3 Circuit Performance, or can I fix it myself?

While some DIY enthusiasts may be able to address this code themselves, it is recommended to consult a qualified mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

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