AutoCodes – GMC – P245A GMC

P245A GMC 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 GMC 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 854

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

What does this mean?

What are the Possible Causes of the DTC P245A GMC?

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 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P245A 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 P245A GMC code?

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

Need Help with the Code?

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Information for Specific GMC Models

P245A 2014 GMC Sierra — Exhaust Gas Recirculation Cooler Bypass Control Circuit
P245A 2015 GMC Sierra — Exhaust Gas Recirculation Cooler Bypass Control Circuit
P245A 2016 GMC Sierra — Exhaust Gas Recirculation Cooler Bypass Control Circuit
P245A 2017 GMC Sierra — Exhaust Gas Recirculation Cooler Bypass Control Circuit
P245A 2018 GMC Sierra — Exhaust Gas Recirculation Cooler Bypass Control Circuit

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 GMC Code

1. What are common symptoms of OBDII code P245A GMC?

- Common symptoms include reduced engine performance, rough idling, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What causes OBDII code P245A GMC to trigger?

- This code is typically triggered by a malfunction in the exhaust gas recirculation cooler bypass control circuit, which can be caused by wiring issues, a faulty EGR cooler bypass control valve, or a defective EGR cooler bypass control solenoid.

3. How serious is OBDII code P245A GMC?

- While the severity can vary, it is advisable to address this code promptly to avoid potential damage to the EGR system and engine components.

4. Can I continue driving with OBDII code P245A GMC?

- It is not recommended to continue driving with this code active, as it can lead to reduced engine performance and potential long-term damage if left unresolved.

5. How do I diagnose OBDII code P245A GMC?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, conducting a visual inspection of the EGR system components, and testing the EGR cooler bypass control valve and solenoid for proper function.

6. What are some repair tips for OBDII code P245A GMC?

- Repair tips include checking and repairing any damaged wiring, replacing the faulty EGR cooler bypass control valve or solenoid, and ensuring proper installation to prevent future issues.

7. Can a DIY enthusiast fix OBDII code P245A GMC?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code by following repair guides and instructions carefully.

8. How much does it cost to repair OBDII code P245A GMC?

- Repair costs can vary depending on the extent of the issue, but it may involve expenses for parts such as the EGR cooler bypass control valve or solenoid, as well as labor costs if taken to a professional mechanic.

9. What happens if I ignore OBDII code P245A GMC?

- Ignoring this code can lead to ongoing engine performance issues, potential damage to the EGR system, and increased fuel consumption over time.

10. Is OBDII code P245A GMC a common issue in GMC vehicles?

- While not as common as some other OBDII codes, P245A related to the exhaust gas recirculation cooler bypass control circuit can occur in GMC vehicles with EGR systems, especially in older models or those with high mileage.