AutoCodes – GMC – P02E9 GMC

P02E9 GMC Code - Diesel Intake Air Flow Position Sensor Circuit High

Quick Answer

The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly 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: P02E9 GMC indicates Diesel Intake Air Flow Position Sensor Circuit High.
Common causes: Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly 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 1,722

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 10, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P02E9 GMC Description

The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. The throttle position sensor is mounted within the throttle body assembly and is not serviceable. The Engine Control Module (ECM) supplies the throttle body with a 5 V reference circuit, a low reference circuit. The asynchronous signal means communication is only going from the throttle body to the ECM. The throttle body cannot receive data from the ECM over the signal/serial data circuit. The throttle position sensor provides a signal voltage that changes relative to the throttle blade angle. The throttle position sensor information is transmitted between the throttle body and the ECM on the signal/serial data circuit. The ECM decodes the serial data signal and is used as voltages for throttle position sensor 1 and 2. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the throttle valve position sensor SENT signal voltage is greater than a calibrated threshold for 0.5 s.

OBDII Code P02E9 GMC - Diesel Intake Air Flow Position Sensor Circuit High - AutoCodes.com — P02E9 GMC Code - Diesel Intake Air Flow Position Sensor Circuit High

What does this mean?

What are the Possible Causes of the DTC P02E9 GMC?

Faulty Throttle Body Assembly
Throttle Body Assembly harness is open or shorted
Throttle Body Assembly circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P02E9 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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P02E9 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 P02E9 GMC code?

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Information for Specific GMC Models

P02E9 2014 GMC Sierra — Diesel Intake Air Flow Position Sensor Circuit High
P02E9 2015 GMC Sierra — Diesel Intake Air Flow Position Sensor Circuit High
P02E9 2016 GMC Sierra — Diesel Intake Air Flow Position Sensor Circuit High
P02E9 2017 GMC Sierra — Diesel Intake Air Flow Position Sensor Circuit High
P02E9 2018 GMC Sierra — Diesel Intake Air Flow Position Sensor Circuit High

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 P02E9 GMC Code

1. What are the common symptoms of OBDII code P02E9 GMC?

- Common symptoms include reduced engine performance, rough idling, stalling, and increased fuel consumption.

2. What causes the OBDII code P02E9 GMC to trigger?

- This code is usually triggered by a fault in the diesel intake air flow position sensor circuit, indicating a high voltage condition.

3. How can I diagnose the issue related to the Diesel Intake Air Flow Position Sensor Circuit High?

- Diagnosis involves checking the sensor's wiring, connectors, and the sensor itself for any signs of damage or malfunction.

4. What are some possible repair tips for resolving the P02E9 GMC code?

- Repair tips may include cleaning or replacing the intake air flow sensor, repairing damaged wiring or connectors, or resetting the engine control module.

5. Can driving with the P02E9 code present cause further damage to the vehicle?

- Continuing to drive with this code present can potentially lead to reduced engine efficiency and performance issues, so it's best to address the problem promptly.

6. Is it safe to drive my vehicle with the Diesel Intake Air Flow Position Sensor Circuit High code?

- While it may be possible to drive the vehicle with this code present, it's recommended to have the issue diagnosed and repaired as soon as possible to prevent further damage.

7. How much does it typically cost to repair the Diesel Intake Air Flow Position Sensor Circuit High issue?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve sensor replacement, wiring repairs, or connector fixes, potentially ranging from $100 to $300 or more.

8. How long does it take to fix the OBDII code P02E9 GMC?

- The repair time can vary depending on the complexity of the issue and the availability of parts, but it may take anywhere from 1 to 3 hours or more to diagnose and fix the problem.

9. Can I reset the OBDII code P02E9 GMC myself after making the necessary repairs?

- Yes, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the engine control module's memory.

10. Will the check engine light turn off automatically after fixing the Diesel Intake Air Flow Position Sensor Circuit High issue?

- In most cases, once the underlying problem is resolved and the code is cleared, the check engine light should turn off on its own after a few successful driving cycles without any issues detected.