AutoCodes – GMC – P02E8 2016 GMC Sierra

P02E8 2016 GMC Sierra 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 2016 GMC Sierra 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.

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Code Popularity 183

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 P02E8 2016 GMC Sierra 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 2016 GMC Sierra - Diesel Intake Air Flow Position Sensor Circuit Low - AutoCodes.com — P02E8 2016 GMC Sierra Code - Diesel Intake Air Flow Position Sensor Circuit Low

What does this mean?

What are the Possible Causes of the DTC P02E8 2016 GMC Sierra?

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 2016 GMC Sierra?

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 2016 GMC Sierra 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 2016 GMC Sierra code?

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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 2016 GMC Sierra Code

What does the OBDII code P02E8 mean on a 2016 GMC Sierra?

The P02E8 code indicates a problem with the Diesel Intake Air Flow Position Sensor Circuit, specifically that the circuit is reading a low voltage signal.

What are the symptoms of code P02E8 on a 2016 GMC Sierra?

Common symptoms include reduced engine performance, rough idling, poor fuel efficiency, or the illumination of the check engine light.

What causes the P02E8 code to appear?

Potential causes include a faulty intake air flow position sensor, damaged wiring or connectors, a failing PCM (Powertrain Control Module), or excessive dirt and debris in the intake system.

How can I diagnose the P02E8 code on my truck?

Start by inspecting the intake air flow position sensor, checking for damaged wiring or loose connections, and using a multimeter to test the sensor's voltage output.

Can a dirty air filter trigger the P02E8 code?

While unlikely, a severely clogged air filter could cause airflow issues that might indirectly contribute to this code by affecting sensor readings.

Is it safe to drive with a P02E8 code active?

Driving with this code is not recommended, as it may lead to reduced engine performance and potential long-term damage to the intake system or engine.

How do I fix the P02E8 code on my 2016 GMC Sierra?

Repairs may involve cleaning or replacing the diesel intake air flow position sensor, fixing damaged wiring or connectors, or clearing the intake system of debris.

Does the P02E8 code require reprogramming the PCM?

Reprogramming the PCM is typically unnecessary unless the PCM itself is faulty and has been verified as the root cause.

Can extreme weather conditions cause the P02E8 code to appear?

Yes, extreme cold or heat can affect electrical connections or sensor performance, potentially triggering this code.

What tools do I need to fix the P02E8 code?

Youâ€™ll need an OBDII scanner, a multimeter for testing electrical circuits, and basic tools to access and inspect the intake air flow position sensor and wiring.