AutoCodes – Chevrolet – P245B Chevrolet

P245B Chevrolet Code - Exhaust Gas Recirculation Cooler Bypass Valve Performance

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 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 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: P245B Chevrolet indicates Exhaust Gas Recirculation Cooler Bypass Valve Performance.
Common causes: Common causes include Faulty Exhaust Gas Recirculation 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: 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.

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Code Popularity 991

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 29, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P245B Chevrolet 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 that the EGR cooler bypass valve is mechanically stuck.

OBDII Code P245B Chevrolet - Exhaust Gas Recirculation Cooler Bypass Valve Performance - AutoCodes.com — P245B Chevrolet Code - Exhaust Gas Recirculation Cooler Bypass Valve Performance

What does this mean?

What are the Possible Causes of the DTC P245B Chevrolet?

Faulty Exhaust Gas Recirculation 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 P245B Chevrolet?

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 P245B Chevrolet 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 more information on how to fix the P245B Chevrolet 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 P245B Chevrolet Code

1. What are common symptoms of OBDII code P245B in a Chevrolet related to the Exhaust Gas Recirculation (EGR) Cooler Bypass Valve Performance?

The common symptoms include reduced engine performance, increased fuel consumption, rough idling, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P245B in a Chevrolet indicating an issue with the EGR Cooler Bypass Valve Performance?

Possible causes include a faulty EGR cooler bypass valve, wiring issues, a malfunctioning EGR system, or a problem with the engine control module (ECM).

3. How can I diagnose OBDII code P245B in my Chevrolet related to the EGR Cooler Bypass Valve Performance issue?

Diagnosis involves using an OBDII scanner to retrieve the trouble code, inspecting the EGR system components for any visible damage or leaks, and conducting electrical tests on the bypass valve and associated wiring.

4. What are the recommended repair options for addressing OBDII code P245B in a Chevrolet due to the EGR Cooler Bypass Valve Performance problem?

Repair options include replacing the faulty EGR cooler bypass valve, repairing any damaged wiring, cleaning or replacing the EGR system components, and resetting the ECM after the repairs are completed.

5. Are there any tips for preventing OBDII code P245B related to the EGR Cooler Bypass Valve Performance issue in a Chevrolet?

Regular maintenance of the EGR system, including cleaning and inspection, can help prevent issues with the EGR cooler bypass valve. Additionally, using high-quality fuel and following the manufacturer's recommended service schedule can also aid in preventing this problem.

6. Can driving with OBDII code P245B in a Chevrolet indicating EGR Cooler Bypass Valve Performance affect the vehicle's overall performance and efficiency?

Driving with this code may lead to reduced engine performance, poor fuel economy, and potential damage to other engine components over time. It is recommended to address the issue promptly to avoid further complications.

7. Is it safe to continue driving my Chevrolet with OBDII code P245B related to the EGR Cooler Bypass Valve Performance issue?

While the vehicle may still be operable with this code present, it is advisable to have the issue diagnosed and repaired as soon as possible to prevent potential engine damage and ensure optimal performance.

8. How much does it typically cost to repair OBDII code P245B associated with the EGR Cooler Bypass Valve Performance in a Chevrolet?

The cost of repairs can vary depending on the specific cause of the issue, the labor rates in your area, and whether any parts need to be replaced. It is recommended to consult a mechanic for an accurate estimate.

9. Can a DIY enthusiast repair OBDII code P245B related to the EGR Cooler Bypass Valve Performance in their Chevrolet?

While some basic troubleshooting and repairs can be done by DIY enthusiasts, diagnosing and repairing issues related to the EGR system may require specialized tools and expertise. It is advisable to seek professional help if you are not confident in your abilities.

10. How long does it typically take to repair OBDII code P245B caused by the EGR Cooler Bypass Valve Performance issue in a Chevrolet?

The repair time can vary depending on the extent of the problem, the availability of parts, and the mechanic's workload. In general, it may take a few hours to a full day to diagnose and repair the issue.