AutoCodes – Pontiac – P1406 Pontiac

P1406 Pontiac Code - EGR Valve Pintle Position Circuit

Quick Answer

The Powertrain Control Module (PCM) determines that the EGR valve is stuck open if the actual Exhaust Gas Recirculation (EGR) position and the learned closed EGR position vary by more than a predetermined value. Common causes include Faulty Exhaust Gas Recirculation (EGR) valve, Carbon blockage of the pintle. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P1406 Pontiac indicates EGR Valve Pintle Position Circuit.
Common causes: Common causes include Faulty Exhaust Gas Recirculation (EGR) valve, Carbon blockage of the pintle.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 10,667

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 19, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1406 Pontiac Description

The Powertrain Control Module (PCM) determines that the EGR valve is stuck open if the actual Exhaust Gas Recirculation (EGR) position and the learned closed EGR position vary by more than a predetermined value. The PCM tests for a stuck valve when the desired EGR position is at 0%. The PCM commands the EGR valve to 100% during certain driving conditions in order to clear a possible restriction from the EGR valve if the PCM determines that the valve is stuck open.

OBDII Code P1406 Pontiac - EGR Valve Pintle Position Circuit - AutoCodes.com — P1406 Pontiac Code - EGR Valve Pintle Position Circuit

What does this mean?

What are the Possible Causes of the DTC P1406 Pontiac?

Faulty Exhaust Gas Recirculation (EGR) valve
Carbon blockage of the pintle

How to Fix the DTC P1406 Pontiac?

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

The P1406 code means that the EGR valve is 10% of the expected position by the Powertrain Control Module (PCM), usually caused by carbon built up n the EGR valve. Start by cleaning the EGR valve.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1406 Pontiac 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.

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Need Help with the 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 P1406 Pontiac Code

1. What does the OBDII code P1406 mean for a Pontiac?

P1406 indicates a problem with the EGR (Exhaust Gas Recirculation) Valve Pintle Position Circuit, meaning the ECM is detecting an incorrect position of the EGR valve pintle.

2. What are the common symptoms of code P1406 on a Pontiac?

Common symptoms include poor engine performance, rough idling, stalling, decreased fuel efficiency, and the Check Engine Light turning on.

3. What causes the P1406 code to appear on a Pontiac?

Possible causes include carbon buildup in the EGR valve, a faulty EGR valve, a damaged or corroded EGR position sensor, or wiring issues in the EGR circuit.

4. Can I drive my Pontiac with a P1406 code?

While the vehicle may still run, driving with this code can lead to reduced performance, increased emissions, and potential engine damage over time. It's best to address the issue promptly.

5. How do I diagnose the P1406 code on my Pontiac?

Start by inspecting the EGR valve and related wiring for damage or buildup. Use a scan tool to monitor the EGR pintle position sensor readings and compare them to the manufacturerâ€™s specifications.

6. How do I fix a P1406 code on a Pontiac?

Potential fixes include cleaning or replacing the EGR valve, repairing damaged wiring or connections, and replacing the EGR position sensor if faulty.

7. How much does it cost to repair a P1406 code on a Pontiac?

The cost varies depending on the repair. EGR valve cleaning might cost $50-$100, while replacing the valve or sensor can range from $150 to $400, including parts and labor.

8. Can cleaning the EGR valve fix the P1406 code?

Yes, if carbon buildup is causing the issue, cleaning the EGR valve may resolve the code. However, if the valve or sensor is faulty, replacement may be necessary.

9. What tools are needed to fix a P1406 code on a Pontiac?

A scan tool for diagnosis, basic hand tools for removing the EGR valve, and possibly a carbon-cleaning solution if buildup is suspected.

10. Does a faulty EGR valve affect emissions in a Pontiac?

Yes, a malfunctioning EGR valve can lead to higher emissions by disrupting the recirculation of exhaust gases, potentially causing the vehicle to fail an emissions test.