AutoCodes – GMC – P02E1 GMC

P02E1 GMC Code - Intake Air Flow Valve Control Performance

Quick Answer

The intake airflow valve is a throttle plate actuator and is used to achieve high exhaust gas recirculation rates. 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: P02E1 GMC indicates Intake Air Flow Valve Control Performance.
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 533

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 09, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P02E1 GMC Description

The intake airflow valve is a throttle plate actuator and is used to achieve high exhaust gas recirculation rates. It increases the pressure difference between exhaust and intake so that the appropriate exhaust quantity can be mixed with the intake air. The intake airflow valve contains a contactless inductive throttle position sensing element that is managed by a customized integrated circuit. The throttle position sensor is mounted within the valve assembly and is not serviceable. The Engine Control Module (ECM) supplies the valve assembly with a 5 V reference circuit, a low reference circuit, an H-bridge motor directional control circuit, and an asynchronous signal/serial data circuit. The asynchronous signal means communication is only going from the valve assembly to the ECM. The valve assembly cannot receive data from the ECM over the signal/serial data circuit. The throttle position sensor provides a signal that changes relative to the throttle blade angle. The throttle position sensor information is transmitted between the valve assembly and the ECM on the signal/serial data circuit. The ECM decodes the serial data signal into separate voltages which are displayed on a scan tool as the voltage inputs from TP sensors 1 and 2. The Diagnostic Trouble Code (DTC) will be set when the desired Throttle Position and the actual Throttle Position is greater than 10%.

OBDII Code P02E1 GMC - Intake Air Flow Valve Control Performance - AutoCodes.com — P02E1 GMC Code - Intake Air Flow Valve Control Performance

What does this mean?

What are the Possible Causes of the DTC P02E1 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 P02E1 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

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P02E1 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 P02E1 GMC code?

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Information for Specific GMC Models

P02E1 2014 GMC Sierra — Intake Air Flow Valve Control Performance
P02E1 2015 GMC Sierra — Intake Air Flow Valve Control Performance
P02E1 2016 GMC Sierra — Intake Air Flow Valve Control Performance
P02E1 2017 GMC Sierra — Intake Air Flow Valve Control Performance
P02E1 2018 GMC Sierra — Intake Air Flow Valve Control 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 P02E1 GMC Code

1. What does the OBDII code P02E1 mean on a GMC vehicle?

P02E1 indicates an issue with the Intake Air Flow Valve Control Performance, meaning the valve is not functioning as expected to regulate airflow into the engine.

2. What are the common symptoms of code P02E1 on a GMC?

Symptoms may include reduced engine performance, poor fuel efficiency, rough idling, hesitation during acceleration, or the Check Engine Light being illuminated.

3. What causes the P02E1 code to appear on a GMC?

Possible causes include a malfunctioning intake air flow valve, wiring issues, a faulty valve control actuator, a clogged air intake system, or problems with the engine control module (ECM).

4. Can I drive my GMC with a P02E1 code?

Driving with this code is not recommended as it can lead to reduced performance, increased emissions, and potential damage to the engine if left unresolved.

5. How is the P02E1 code diagnosed on a GMC?

A mechanic will use a diagnostic scanner to confirm the code, inspect the intake air flow valve and related wiring, and check for any blockages or malfunctions in the air intake system.

6. How can I fix the P02E1 code on my GMC?

Repairs typically involve cleaning or replacing the intake air flow valve, repairing or replacing damaged wiring, or recalibrating the ECM if necessary.

7. Does the intake air flow valve need to be replaced to resolve the P02E1 code?

Not always. The valve may just need cleaning, and other components like wiring or the actuator could be the root cause.

8. What tools are needed to fix a P02E1 code on a GMC?

Common tools include a diagnostic scanner, basic hand tools, and possibly a multimeter to test electrical connections.

9. How much does it cost to repair the P02E1 code on a GMC?

Costs vary depending on the issue, but repairs can range from $100 to $400 for cleaning or replacing the valve, plus labor.

10. Can a clogged air filter cause the P02E1 code on a GMC?

Yes, a clogged air filter can restrict airflow and potentially contribute to this code, so itâ€™s important to inspect and replace the air filter if necessary.