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Engine-Codes – GMC – P245A 2018 GMC Sierra

P245A 2018 GMC Sierra Code - Exhaust Gas Recirculation Cooler Bypass Control Circuit

Quick Answer

The P245A diagnostic trouble code (DTC) for a 2018 GMC Sierra refers to an issue with the Exhaust Gas Recirculation (EGR) Cooler Bypass Control Circuit. Common causes include Faulty EGR Cooler Bypass Control Valve: A malfunctioning valve can prevent the EGR system from operating properly, Wiring Issues: Damaged or corroded wiring connections can disrupt the circuit and trigger the P245A code, EGR Cooler Bypass Control Circuit Short: A short circuit in the circuit can cause the system to malfunction. 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 2018 GMC Sierra indicates Exhaust Gas Recirculation Cooler Bypass Control Circuit.
Common causes
Common causes include Faulty EGR Cooler Bypass Control Valve: A malfunctioning valve can prevent the EGR system from operating properly, Wiring Issues: Damaged or corroded wiring connections can disrupt the circuit and trigger the P245A code, EGR Cooler Bypass Control Circuit Short: A short circuit in the circuit can cause the system to malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 18, 2024
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Code P245A 2018 GMC Sierra Description

The P245A diagnostic trouble code (DTC) for a 2018 GMC Sierra refers to an issue with the Exhaust Gas Recirculation (EGR) Cooler Bypass Control Circuit. The EGR system is responsible for reducing emissions by recirculating a portion of the exhaust gases back into the engine's intake manifold. The EGR cooler helps to cool the recirculated exhaust gases before they are reintroduced into the engine to prevent overheating.

OBDII Code P245A 2018 GMC Sierra - Exhaust Gas Recirculation Cooler Bypass Control Circuit
P245A 2018 GMC Sierra Code - Exhaust Gas Recirculation Cooler Bypass Control Circuit

Common Causes of P245A 2018 GMC Sierra

  1. Faulty EGR Cooler Bypass Control Valve: A malfunctioning valve can prevent the EGR system from operating properly.
  2. Wiring Issues: Damaged or corroded wiring connections can disrupt the circuit and trigger the P245A code.
  3. EGR Cooler Bypass Control Circuit Short: A short circuit in the circuit can cause the system to malfunction.
  4. EGR Cooler Bypass Control Module Failure: A failure in the control module can prevent proper communication with the EGR system.

Symptoms of P245A 2018 GMC Sierra

  1. Check Engine Light: The most common symptom associated with the P245A code is the illumination of the Check Engine Light on the vehicle's dashboard.
  2. Reduced Engine Performance: The engine may experience a decrease in power and responsiveness due to the EGR system not functioning correctly.
  3. Increased Emissions: A faulty EGR Cooler Bypass Control Circuit can lead to higher emissions output from the vehicle.
  4. Poor Fuel Economy: The vehicle may exhibit decreased fuel efficiency as a result of the EGR system malfunctioning.

How to Fix P245A 2018 GMC Sierra

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble codes and pinpoint the specific cause of the problem.
  2. Inspect EGR Cooler Bypass Control Valve: Check the valve for proper operation and replace if necessary.
  3. Check Wiring Connections: Inspect the wiring connections for any damage or corrosion and repair as needed.
  4. Test EGR Cooler Bypass Control Module: Test the control module to ensure it is functioning correctly and replace if faulty.
  5. Clear Codes and Test Drive: Clear the trouble codes from the vehicle's computer, and test drive to ensure the issue has been resolved.

Cost to Fix P245A 2018 GMC Sierra

The cost of repairing a P245A code on a 2018 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair costs for this type of problem can range from $200 to $500, including parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to obtain quotes from multiple sources to get a more accurate estimate.

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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 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P245A in a 2018 GMC Sierra?

The common symptoms of code P245A include engine hesitation, rough idling, reduced fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P245A in a 2018 GMC Sierra indicate?

OBDII code P245A indicates a problem with the Exhaust Gas Recirculation (EGR) Cooler Bypass Control Circuit in the vehicle.

3. What are the possible causes of OBDII code P245A in a 2018 GMC Sierra?

Possible causes of code P245A include a faulty EGR cooler bypass control valve, wiring issues in the control circuit, or a malfunctioning EGR system.

4. How can I diagnose the OBDII code P245A in my 2018 GMC Sierra?

Diagnosing code P245A involves using an OBDII scanner to retrieve the fault codes, inspecting the EGR system components for any visible damage, and testing the EGR cooler bypass control valve for proper functionality.

5. Can I continue driving my 2018 GMC Sierra with OBDII code P245A?

It is not recommended to drive your vehicle with code P245A as it can lead to further damage to the EGR system and affect the performance of the engine.

6. How can I repair OBDII code P245A in a 2018 GMC Sierra?

Repairing code P245A involves replacing the faulty EGR cooler bypass control valve, repairing any damaged wiring in the control circuit, and ensuring proper functioning of the EGR system.

7. Are there any DIY tips for fixing OBDII code P245A in a 2018 GMC Sierra?

While some simple checks like inspecting for loose connections or damaged wires can be done DIY, it is recommended to consult a professional mechanic for a proper diagnosis and repair of code P245A.

8. Will resetting the check engine light clear OBDII code P245A in my 2018 GMC Sierra?

Resetting the check engine light may temporarily turn it off, but if the underlying issue causing code P245A is not addressed, the light will likely reappear after driving cycles.

9. How much does it cost to fix OBDII code P245A in a 2018 GMC Sierra?

The cost of fixing code P245A can vary depending on the specific issue causing the code, the labor rates in your area, and whether you choose to repair it yourself or seek professional help.

10. Can a clogged EGR cooler cause OBDII code P245A in a 2018 GMC Sierra?

Yes, a clogged EGR cooler can restrict the flow of exhaust gases, leading to issues with the EGR system and potentially triggering code P245A in a 2018 GMC Sierra.

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