AutoCodes – GMC – P245A 2016 GMC Sierra

P245A 2016 GMC Sierra Code - Exhaust Gas Recirculation Cooler Bypass Control Circuit

Quick Answer

The Engine Control Module (ECM) uses the Exhaust Gas Recirculation (EGR) bypass valve position sensor to determine the position of the bypass valve. Common causes include Faulty Exhaust Gas Recirculation (EGR) Cooler Bypass Valve, Exhaust Gas Recirculation Cooler Bypass Valve harness is open or shorted, Exhaust Gas Recirculation Cooler Bypass Valve circuit poor electrical connection. 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: P245A 2016 GMC Sierra indicates Exhaust Gas Recirculation Cooler Bypass Control Circuit.
Common causes: Common causes include Faulty Exhaust Gas Recirculation (EGR) Cooler Bypass Valve, Exhaust Gas Recirculation Cooler Bypass Valve harness is open or shorted, Exhaust Gas Recirculation Cooler Bypass Valve circuit poor electrical connection.
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 165

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 Sep 30, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P245A 2016 GMC Sierra Description

The Engine Control Module (ECM) uses the Exhaust Gas Recirculation (EGR) bypass valve position sensor to determine the position of the bypass valve. The ECM sends a reference voltage through the 5-volt reference circuit to the position sensor. The ECM provides a voltage return path for the sensor through the low reference circuit. A variable voltage signal, based on the valve position, is sent from the sensor to the ECM through the position sensor signal circuit. The ECM compares the actual bypass valve position with the desired bypass valve position when the valve is commanded open or closed. The EGR cooler bypass valve is controlled by the ECM through the bypass valve motor high control and the low control circuits. The ECM will pulse width modulate the low control circuit to ground when EGR cooler bypass is desired.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects an open circuit condition of the EGR cooler bypass valve control circuit for greater than 3 s.

OBDII Code P245A 2016 GMC Sierra - Exhaust Gas Recirculation Cooler Bypass Control Circuit - AutoCodes.com — P245A 2016 GMC Sierra Code - Exhaust Gas Recirculation Cooler Bypass Control Circuit

What does this mean?

What are the Possible Causes of the DTC P245A 2016 GMC Sierra?

Faulty Exhaust Gas Recirculation (EGR) Cooler Bypass Valve
Exhaust Gas Recirculation Cooler Bypass Valve harness is open or shorted
Exhaust Gas Recirculation Cooler Bypass Valve circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P245A 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P245A 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 P245A 2016 GMC Sierra code?

Need more information on how to fix the P245A 2016 GMC Sierra code? Get Access to Factory Service Manuals

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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 P245A 2016 GMC Sierra Code

1. What does the OBDII code P245A mean on a 2016 GMC Sierra?

P245A indicates a problem with the Exhaust Gas Recirculation (EGR) Cooler Bypass Control Circuit, which manages the bypass valve for the EGR cooler.

2. What are the common symptoms of code P245A on a 2016 GMC Sierra?

Symptoms may include a check engine light, reduced fuel efficiency, increased emissions, or loss of engine performance.

3. What causes the P245A code to appear on a 2016 GMC Sierra?

Common causes include a faulty EGR cooler bypass valve, wiring issues, a malfunctioning control module, or carbon buildup in the EGR system.

4. Can I drive my 2016 GMC Sierra with a P245A code?

While the vehicle may still be drivable, ignoring the issue can lead to reduced engine performance and potential damage to the EGR system over time.

5. How can I diagnose the P245A code on my 2016 GMC Sierra?

Start by using an OBDII scanner to confirm the code, then inspect the EGR bypass valve, wiring, and connectors for damage or carbon buildup.

6. How do I fix the P245A code on my 2016 GMC Sierra?

Repairs may include cleaning or replacing the EGR bypass valve, repairing damaged wiring, or updating/reprogramming the engine control module if necessary.

7. How much does it cost to repair a P245A code on a 2016 GMC Sierra?

Repair costs vary but typically range from $150 to $600, depending on whether parts like the EGR bypass valve need replacement.

8. Can a dirty EGR system cause the P245A code?

Yes, carbon buildup in the EGR system can cause the bypass valve to stick, triggering the code.

9. What tools are needed to repair the P245A code on a 2016 GMC Sierra?

You may need an OBDII scanner, basic hand tools, and possibly specialized equipment to clean or replace the EGR bypass valve.

10. Will clearing the P245A code with a scanner fix the issue?

Clearing the code may temporarily turn off the check engine light, but the underlying problem must be addressed to prevent the code from returning.

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