AutoCodes – Generic – P00E9

P00E9 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 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 2,498

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 17, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P00E9 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 - Intake Air Temperature Sensor 3 Circuit Performance - AutoCodes.com — P00E9 Code - Intake Air Temperature Sensor 3 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P00E9?

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?

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 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 code?

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

Need Help with the Code?

Get the P00E9 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P00E9 Buick — Intake Air Temperature Sensor 3 Circuit Performance
P00E9 Cadillac — Intake Air Temperature Sensor 3 Circuit Performance
P00E9 Chevrolet — Intake Air Temperature Sensor 3 Circuit Performance
P00E9 GMC — Intake Air Temperature Sensor 3 Circuit Performance

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 Code

1. What are common symptoms of OBDII code P00E9 (Intake Air Temperature Sensor 3 Circuit Performance)?

- Common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and potential stalling.

2. What causes OBDII code P00E9 to be triggered?

- The code is typically triggered by a faulty intake air temperature sensor 3, damaged wiring or connectors, or issues with the sensor circuit.

3. How can I diagnose the cause of OBDII code P00E9?

- You can diagnose the issue by checking the intake air temperature sensor 3 for proper operation, inspecting the sensor's wiring and connectors for damage, and using a scan tool to monitor sensor data.

4. Can a dirty air filter trigger OBDII code P00E9?

- While a dirty air filter can affect engine performance, it is not a direct cause of OBDII code P00E9 related to the intake air temperature sensor.

5. Is it safe to continue driving with OBDII code P00E9 present?

- It is not recommended to continue driving with the code present as it can lead to further engine issues and potential damage over time.

6. How can I repair OBDII code P00E9 myself?

- You can attempt to repair the code by replacing the intake air temperature sensor 3, repairing any damaged wiring or connectors, and clearing the code with a scan tool.

7. Can resetting the ECU clear OBDII code P00E9 permanently?

- Resetting the ECU may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear.

8. Will OBDII code P00E9 cause my vehicle to fail an emissions test?

- Yes, OBDII code P00E9 can cause a vehicle to fail an emissions test due to the impact on engine performance and emissions control systems.

9. Does OBDII code P00E9 affect the overall safety of the vehicle?

- While OBDII code P00E9 is not directly related to safety systems, it can affect engine performance and drivability, potentially impacting overall vehicle safety.

10. How much does it typically cost to repair OBDII code P00E9 at a professional mechanic?

- The cost of repairing OBDII code P00E9 can vary depending on the specific cause, but it may range from $100 to $300 for parts and labor at a professional mechanic.