AutoCodes – Chevrolet – P040D Chevrolet

P040D Chevrolet Code - Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage

Quick Answer

The Exhaust Gas Recirculation (EGR) temperature sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the EGR cooler. Common causes include Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2, Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 2 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: P040D Chevrolet indicates Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage.
Common causes: Common causes include Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2, Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 2 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 2,605

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 Jun 20, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P040D Chevrolet Description

The Exhaust Gas Recirculation (EGR) temperature sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the EGR cooler. The Engine Control Module (ECM) supplies 5 volts to the EGR temperature sensor signal circuit and a ground for the low reference circuit. When the EGR temperature sensor is cold, the sensor resistance is high. When the EGR temperature increases, the sensor resistance decreases. The ECM detects a higher voltage on the EGR temperature signal circuit with high sensor resistance. With lower sensor resistance, the ECM detects a lower voltage on the EGR temperature signal circuit. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the EGR temperature sensor resistance is greater than 885 Ω for greater than 5 s

OBDII Code P040D Chevrolet - Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage - AutoCodes.com — P040D Chevrolet Code - Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P040D Chevrolet?

Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 2
Exhaust Gas Recirculation Temperature Sensor 2 harness is open or shorted
Exhaust Gas Recirculation Temperature Sensor 2 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P040D 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 P040D 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 P040D Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Chevrolet Models

P040D 2014 Chevrolet Silverado — Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage
P040D 2015 Chevrolet Silverado — Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage
P040D 2016 Chevrolet Silverado — Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage
P040D 2017 Chevrolet Silverado — Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage
P040D 2018 Chevrolet Silverado — Exhaust Gas Recirculation Temperature Sensor 2 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 P040D Chevrolet Code

1. What are common symptoms of OBDII code P040D in a Chevrolet related to the Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage?

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

2. What causes the OBDII code P040D in a Chevrolet related to the Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage?

- The code is typically triggered by a malfunction in the exhaust gas recirculation temperature sensor, which may be caused by sensor failure, wiring issues, or a faulty EGR valve.

3. How can I diagnose the OBDII code P040D in a Chevrolet related to the Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage?

- Diagnosis involves using an OBDII scanner to retrieve the fault code, testing the EGR temperature sensor and its wiring for continuity and proper voltage, and inspecting the EGR valve for any signs of malfunction.

4. Can I still drive my Chevrolet with the OBDII code P040D related to the Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage?

- It is not recommended to drive the vehicle with this code present, as it can lead to further engine damage and decreased fuel efficiency. It is best to address the issue as soon as possible.

5. How can I repair the OBDII code P040D in a Chevrolet related to the Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage?

- Repair options may include replacing the exhaust gas recirculation temperature sensor, repairing any damaged wiring, cleaning or replacing the EGR valve, and clearing the fault code with an OBDII scanner.

6. Are there any DIY tips for addressing the OBDII code P040D in a Chevrolet related to the Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage?

- While some basic diagnostics can be done at home, it is recommended to seek professional help for accurate diagnosis and repair of this code to ensure the issue is properly resolved.

7. How much does it typically cost to repair the OBDII code P040D in a Chevrolet related to the Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage?

- Repair costs can vary depending on the extent of the issue and the specific repairs needed, but they may range from $100 to $400 or more, including parts and labor.

8. What happens if the OBDII code P040D in a Chevrolet related to the Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage is ignored?

- Ignoring this code can lead to poor engine performance, increased emissions, potential damage to the catalytic converter, and ultimately, more costly repairs in the future.

9. How long does it typically take to repair the OBDII code P040D in a Chevrolet related to the Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage?

- The repair time can vary based on the specific issue and the expertise of the mechanic, but it may take anywhere from 1 to 3 hours to address this code.

10. Can resetting the Check Engine Light resolve the OBDII code P040D in a Chevrolet related to the Exhaust Gas Recirculation Temperature Sensor 2 Circuit High Voltage?

- Simply clearing the fault code may temporarily turn off the Check Engine Light, but if the underlying issue is not fixed, the code is likely to reappear. It's important to address the root cause of the problem.