AutoCodes – Buick – P00E9 Buick

P00E9 Buick 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 Buick 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,325

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P00E9 Buick 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 Buick - Intake Air Temperature Sensor 3 Circuit Performance - AutoCodes.com — P00E9 Buick Code - Intake Air Temperature Sensor 3 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P00E9 Buick?

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 Buick?

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 Buick 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 Buick code?

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

Need Help with the Code?

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

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 Buick Code

1. What does the OBDII code P00E9 mean on a Buick?

P00E9 indicates an issue with the Intake Air Temperature (IAT) Sensor 3, specifically related to its circuit performance.

2. What are the common symptoms of code P00E9 in a Buick?

Symptoms can include poor engine performance, reduced fuel efficiency, rough idling, or an illuminated check engine light.

3. What causes the P00E9 code to trigger?

Common causes include a faulty IAT sensor, damaged wiring or connectors, a malfunctioning PCM (Powertrain Control Module), or intake air leaks.

4. Can I drive my Buick with a P00E9 code?

While the vehicle may still be drivable, ignoring the issue can lead to reduced performance and potential long-term engine damage.

5. How do I troubleshoot the P00E9 code on my Buick?

Inspect the IAT sensor and its wiring for damage or loose connections. Use a multimeter to test the sensor's resistance and ensure it matches the manufacturer's specifications.

6. Does the P00E9 code always mean the IAT sensor is bad?

Not necessarily. The issue could also stem from damaged wiring, a poor connection, or a problem with the PCM.

7. How much does it cost to repair a P00E9 code on a Buick?

Repair costs vary but typically range from $50 to $200, depending on whether the sensor, wiring, or other components need replacement.

8. Can a dirty air filter cause the P00E9 code?

A clogged air filter can affect air intake but is unlikely to directly cause the P00E9 code. However, itâ€™s good practice to check and replace it if dirty.

9. Where is the IAT Sensor 3 located on a Buick?

The IAT Sensor 3 is typically located in the intake manifold or air intake duct. Refer to your vehicleâ€™s service manual for the exact location.

10. Will clearing the P00E9 code fix the problem permanently?

Clearing the code may turn off the check engine light temporarily, but the underlying issue must be diagnosed and repaired to prevent the code from returning.