AutoCodes – Generic – P2495

P2495 Code - Exhaust Gas Recirculation Cooler Bypass Position Sensor Circuit High Voltage

Quick Answer

The Engine Control Module (ECM) uses the Exhaust Gas Recirculation (EGR) cooler 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 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: P2495 indicates Exhaust Gas Recirculation Cooler Bypass Position Sensor Circuit High Voltage.
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: 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 9,758

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 P2495 Description

The Engine Control Module (ECM) uses the Exhaust Gas Recirculation (EGR) cooler 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 bypass valve position, is sent from the sensor to the ECM through the position sensor signal circuit. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the EGR position sensor voltage is greater than a calibrated threshold.

OBDII Code P2495 - Exhaust Gas Recirculation Cooler Bypass Position Sensor Circuit High Voltage - AutoCodes.com — P2495 Code - Exhaust Gas Recirculation Cooler Bypass Position Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2495?

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 P2495?

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 P2495 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 P2495 code?

Need more information on how to fix the P2495 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2495 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2495 Buick — Exhaust Gas Recirculation Cooler Bypass Position Sensor Circuit High Voltage
P2495 Cadillac — Exhaust Gas Recirculation Cooler Bypass Position Sensor Circuit High Voltage
P2495 Chevrolet — Exhaust Gas Recirculation Cooler Bypass Position Sensor Circuit High Voltage
P2495 GMC — Exhaust Gas Recirculation Cooler Bypass Position Sensor Circuit High Voltage

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 P2495 Code

1. What are the common symptoms of OBDII code P2495?

The common symptoms of code P2495 include the Check Engine Light coming on, reduced engine performance, and potential hesitation during acceleration.

2. What can cause the Exhaust Gas Recirculation Cooler Bypass Position Sensor Circuit High Voltage code?

Code P2495 is commonly caused by a malfunctioning EGR cooler bypass position sensor, wiring issues, or a faulty ECU.

3. How serious is OBDII code P2495?

While the severity of this code can vary, it is important to address it promptly to prevent potential damage to the EGR system and ensure optimal engine performance.

4. How do I diagnose the cause of OBDII code P2495?

Diagnosing code P2495 involves using an OBDII scanner to retrieve the code, inspecting the EGR cooler bypass position sensor and its wiring, and potentially performing voltage tests.

5. Can I continue driving with OBDII code P2495?

It is generally not recommended to continue driving with code P2495 present, as it can lead to reduced engine efficiency and potential long-term damage if left unaddressed.

6. How can I repair OBDII code P2495?

Repairing code P2495 may involve replacing the EGR cooler bypass position sensor, repairing any damaged wiring, or resetting the ECU after addressing the underlying issue.

7. Will resetting the ECU clear OBDII code P2495?

Resetting the ECU may temporarily clear the code, but if the underlying issue causing P2495 is not addressed, the code is likely to reappear after driving cycles.

8. Can a DIY enthusiast fix OBDII code P2495?

Depending on the individual's skill level and access to tools, DIY enthusiasts may be able to diagnose and repair code P2495, especially if they have experience working on EGR systems.

9. Is it necessary to replace the EGR cooler bypass position sensor to fix OBDII code P2495?

In many cases, replacing the EGR cooler bypass position sensor is necessary to fix code P2495, especially if it is found to be faulty during diagnosis.

10. How can I prevent OBDII code P2495 from recurring?

Regular maintenance of the EGR system, such as cleaning components and ensuring proper wiring connections, can help prevent the recurrence of code P2495.