AutoCodes – GMC – P04E2 GMC

P04E2 GMC Code - Crankcase Ventilation Hose Connection Pressure Sensor Circuit Low Voltage

Quick Answer

This diagnostic monitors the performance of the Positive Crankcase Ventilation (PCV) System. Common causes include Faulty Crankcase Pressure Sensor, Crankcase Pressure Sensor harness is open or shorted, Crankcase Pressure Sensor 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: P04E2 GMC indicates Crankcase Ventilation Hose Connection Pressure Sensor Circuit Low Voltage.
Common causes: Common causes include Faulty Crankcase Pressure Sensor, Crankcase Pressure Sensor harness is open or shorted, Crankcase Pressure Sensor 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 692

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 Aug 18, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P04E2 GMC Description

This diagnostic monitors the performance of the Positive Crankcase Ventilation (PCV) System. The pressure sensor is a pressure transducer that outputs a voltage proportional to the gauge pressure between the crankcase ventilation hose and the atmosphere. The sensor measures the pressure change that varies in conjunction with the engine air flow and pressure pulses as the cylinders go up and down in the crankcase. The Diagnostic Trouble Code (DTC) will be set when the Crankcase Ventilation Hose Connection Pressure Sensor signal is less than 0.22 V for greater than 3 s.

OBDII Code P04E2 GMC - Crankcase Ventilation Hose Connection Pressure Sensor Circuit Low Voltage - AutoCodes.com — P04E2 GMC Code - Crankcase Ventilation Hose Connection Pressure Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P04E2 GMC?

Faulty Crankcase Pressure Sensor
Crankcase Pressure Sensor harness is open or shorted
Crankcase Pressure Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P04E2 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 P04E2 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 P04E2 GMC code?

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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 P04E2 GMC Code

1. What are the common symptoms of OBDII code P04E2 GMC?

- Common symptoms include rough idling, loss of power, engine misfires, and an illuminated Check Engine Light.

2. What can cause the OBDII code P04E2 GMC to trigger?

- The code is typically triggered by a faulty crankcase ventilation hose connection pressure sensor or issues with the sensor circuit's voltage levels.

3. How serious is the OBDII code P04E2 GMC?

- While the code may not cause immediate harm to the vehicle, it can lead to poor engine performance and increased emissions if left unresolved.

4. How can I diagnose the OBDII code P04E2 GMC?

- Diagnosis typically involves using a scan tool to read the code, inspecting the crankcase ventilation system, and testing the pressure sensor and its circuit for proper functioning.

5. What are the repair options for OBDII code P04E2 GMC?

- Repairs may involve replacing the crankcase ventilation hose connection pressure sensor, repairing any damaged wiring in the sensor circuit, or addressing any vacuum leaks in the system.

6. Can I drive my vehicle with the OBDII code P04E2 GMC?

- It is generally not recommended to drive the vehicle with this code active, as it can lead to decreased engine performance and potential long-term damage if ignored.

7. How much does it cost to fix OBDII code P04E2 GMC?

- The cost of repairs can vary depending on the extent of the issue, but it may range from $100 to $300 for parts and labor.

8. How often does the OBDII code P04E2 GMC occur in GMC vehicles?

- The code is relatively uncommon but can occur in GMC vehicles with faulty crankcase ventilation systems or sensor issues.

9. Can I reset the OBDII code P04E2 GMC on my own?

- While you can clear the code with an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

10. Are there any preventative maintenance steps to avoid OBDII code P04E2 GMC?

- Regularly inspecting and maintaining the crankcase ventilation system, including the pressure sensor and associated components, can help prevent the occurrence of this code.