P0406 2015 Chevrolet Silverado Code - Exhaust Gas Recirculation Position Sensor Circuit High Voltage
Quick Answer
The Engine Control Module (ECM) uses the Exhaust Gas Recirculation (EGR) position sensor to determine the position of the EGR valve. Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation Valve harness is open or shorted, Exhaust Gas Recirculation Valve 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
- P0406 2015 Chevrolet Silverado indicates Exhaust Gas Recirculation Position Sensor Circuit High Voltage.
- Common causes
- Common causes include Faulty Exhaust Gas Recirculation (EGR) Valve, Exhaust Gas Recirculation Valve harness is open or shorted, Exhaust Gas Recirculation Valve 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.
Code P0406 2015 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0406 2015 Chevrolet Silverado?
- Faulty Exhaust Gas Recirculation (EGR) Valve
- Exhaust Gas Recirculation Valve harness is open or shorted
- Exhaust Gas Recirculation Valve circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0406 2015 Chevrolet Silverado?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0406 2015 Chevrolet Silverado 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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Frequently Asked Questions about P0406 2015 Chevrolet Silverado Code
1. What does the P0406 code mean on a 2015 Chevrolet Silverado?
The P0406 code indicates a high voltage issue in the Exhaust Gas Recirculation (EGR) Position Sensor Circuit, meaning the sensor is sending a signal outside its expected range.
2. What are the common symptoms of a P0406 code in a Chevy Silverado?
Symptoms may include the check engine light turning on, rough idling, reduced fuel efficiency, poor engine performance, or increased emissions.
3. What causes the P0406 code on a 2015 Chevrolet Silverado?
Common causes include a faulty EGR position sensor, wiring issues like damaged or corroded connectors, or a malfunctioning EGR valve.
4. Can I drive my 2015 Chevrolet Silverado with a P0406 code?
While the vehicle may be drivable, it’s not recommended as it can lead to poor performance, higher emissions, and potential long-term engine damage.
5. How can I fix the P0406 code on my Chevy Silverado?
Repairs may involve replacing the EGR position sensor, repairing damaged wiring or connectors, cleaning or replacing the EGR valve, or updating the vehicle’s software.
6. How much does it cost to fix the P0406 code on a 2015 Silverado?
Repairs can cost between $150 and $400, depending on whether the issue is with the sensor, the EGR valve, or the wiring.
7. How can I test the EGR position sensor on my Silverado?
You can use a multimeter to check the voltage output of the sensor at different positions or monitor sensor readings with an OBDII scanner.
8. Will clearing the P0406 code fix the problem?
Clearing the code might temporarily turn off the check engine light, but the underlying issue must be addressed to prevent the code from returning.
9. Can a clogged EGR valve cause the P0406 code?
Yes, a clogged or stuck EGR valve can lead to incorrect sensor readings, contributing to the P0406 code.
10. Is the P0406 code related to emissions testing?
Yes, the P0406 code can cause your Silverado to fail an emissions test due to improper EGR system operation and increased pollutants.
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