AutoCodes – GMC – P02E8 GMC

P02E8 GMC Code - Diesel Intake Air Flow Position Sensor Circuit Low

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: P02E8 GMC indicates Diesel Intake Air Flow Position Sensor Circuit Low.
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.

Save to My Repairs My Repairs

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

Code Popularity 2,824

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 Jun 10, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
Add Comment

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

Code P02E8 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 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 less than a calibrated threshold for 0.5 s.

OBDII Code P02E8 GMC - Diesel Intake Air Flow Position Sensor Circuit Low - AutoCodes.com — P02E8 GMC Code - Diesel Intake Air Flow Position Sensor Circuit Low

What does this mean?

What are the Possible Causes of the DTC P02E8 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 P02E8 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 P02E8 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 P02E8 GMC code?

Need more information on how to fix the P02E8 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P02E8 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P02E8 2014 GMC Sierra — Diesel Intake Air Flow Position Sensor Circuit Low
P02E8 2015 GMC Sierra — Diesel Intake Air Flow Position Sensor Circuit Low
P02E8 2016 GMC Sierra — Diesel Intake Air Flow Position Sensor Circuit Low
P02E8 2017 GMC Sierra — Diesel Intake Air Flow Position Sensor Circuit Low
P02E8 2018 GMC Sierra — Diesel Intake Air Flow Position Sensor Circuit Low

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 P02E8 GMC Code

1. What are the common symptoms of OBDII code P02E8 in a GMC diesel vehicle?

The common symptoms include poor engine performance, reduced power, rough idling, and potential stalling.

2. What are the possible causes of the Diesel Intake Air Flow Position Sensor Circuit Low code P02E8 in a GMC vehicle?

Possible causes may include a faulty intake air flow position sensor, damaged wiring or connectors, a clogged air filter, or issues with the intake system.

3. How can I diagnose the cause of OBDII code P02E8 in my GMC diesel vehicle?

You can diagnose the issue by performing a visual inspection of the intake system components, checking the sensor wiring and connectors, testing the sensor with a multimeter, and using a scan tool to monitor sensor data.

4. Can a dirty air filter trigger the P02E8 code in a GMC diesel vehicle?

Yes, a clogged or dirty air filter can disrupt the air flow to the sensor, causing incorrect readings and potentially triggering the P02E8 code.

5. What are some repair tips for addressing the Diesel Intake Air Flow Position Sensor Circuit Low code in a GMC vehicle?

Repair tips may include cleaning or replacing the air filter, inspecting and repairing damaged wiring or connectors, testing and replacing the intake air flow sensor if necessary, and clearing the code with a scan tool.

6. Is it safe to continue driving my GMC diesel vehicle with the P02E8 trouble code?

It is not recommended to drive your vehicle with the P02E8 code present, as it can lead to further engine damage and unsafe driving conditions due to potential power loss or stalling.

7. How much does it typically cost to repair the Diesel Intake Air Flow Position Sensor Circuit Low issue in a GMC vehicle?

The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can I reset the P02E8 trouble code in my GMC diesel vehicle without fixing the underlying issue?

While you can clear the code with a scan tool, it is important to address the root cause of the problem to prevent the code from reoccurring and potentially causing further damage.

9. Will a P02E8 trouble code affect the emissions output of my GMC diesel vehicle?

Yes, the P02E8 code can affect the emissions output of your vehicle due to improper air flow readings, potentially leading to increased emissions and failing emissions tests.

10. How can regular maintenance help prevent the occurrence of the P02E8 code in a GMC diesel vehicle?

Regular maintenance, such as replacing air filters at recommended intervals, inspecting intake system components, and keeping sensors clean, can help prevent issues that may trigger the P02E8 trouble code.