AutoCodes – Infiniti – P0078 2005 Infiniti G35

P0078 2005 Infiniti G35 Code - Exhaust Valve Timing Control Magnet Retarder Circuit Bank 1

Quick Answer

Exhaust valve timing control magnet retarder controls the shut/open timing of the exhaust valve by ON/OFF pulse duty signals sent from the Engine Control Module (ECM). Common causes include Faulty Exhaust Valve Timing Control Magnet Retarder, Exhaust Valve Timing Control Magnet Retarder harness is open or shorted, Exhaust Valve Timing Control Magnet Retarder circuit poor electrical circuit connector. 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: P0078 2005 Infiniti G35 indicates Exhaust Valve Timing Control Magnet Retarder Circuit Bank 1.
Common causes: Common causes include Faulty Exhaust Valve Timing Control Magnet Retarder, Exhaust Valve Timing Control Magnet Retarder harness is open or shorted, Exhaust Valve Timing Control Magnet Retarder circuit poor electrical circuit connector.
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 7,754

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 Oct 25, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0078 2005 Infiniti G35 Description

Exhaust valve timing control magnet retarder controls the shut/open timing of the exhaust valve by ON/OFF pulse duty signals sent from the Engine Control Module (ECM). The longer pulse width retards valve angle. The shorter pulse width advances valve angle.

OBDII Code P0078 2005 Infiniti G35 - Exhaust Valve Timing Control Magnet Retarder Circuit Bank 1 - AutoCodes.com — P0078 2005 Infiniti G35 Code - Exhaust Valve Timing Control Magnet Retarder Circuit Bank 1

What does this mean?

What are the Possible Causes of the DTC P0078 2005 Infiniti G35?

Faulty Exhaust Valve Timing Control Magnet Retarder
Exhaust Valve Timing Control Magnet Retarder harness is open or shorted
Exhaust Valve Timing Control Magnet Retarder circuit poor electrical circuit connector

How to Fix the DTC P0078 2005 Infiniti G35?

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 P0078 2005 Infiniti G35 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 P0078 2005 Infiniti G35 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 P0078 2005 Infiniti G35 Code

1. What are the common symptoms of OBDII code P0078 on a 2005 Infiniti G35?

- Common symptoms include rough idling, reduced engine performance, and the illumination of the Check Engine light.

2. What does the OBDII code P0078 on a 2005 Infiniti G35 indicate?

- The code P0078 indicates a problem with the Exhaust Valve Timing Control Magnet Retarder Circuit on Bank 1 of the engine.

3. What are the possible causes of OBDII code P0078 on a 2005 Infiniti G35?

- Possible causes include a faulty exhaust valve timing control magnet, damaged wiring or connectors, low engine oil levels, or issues with the engine control module.

4. How can I diagnose the issue causing OBDII code P0078 on my 2005 Infiniti G35?

- Diagnosing the issue typically involves inspecting the wiring and connectors, testing the exhaust valve timing control magnet, and checking the engine oil levels.

5. Can I continue driving my 2005 Infiniti G35 with OBDII code P0078?

- It is not recommended to drive the vehicle with this code present, as it can lead to further engine damage and potential safety hazards.

6. How can I repair OBDII code P0078 on my 2005 Infiniti G35?

- Repairing the issue may involve replacing the exhaust valve timing control magnet, repairing damaged wiring or connectors, or addressing any underlying engine problems.

7. Is it possible to reset the Check Engine light after fixing OBDII code P0078 on a 2005 Infiniti G35?

- Yes, the Check Engine light can be reset using an OBDII scanner tool after the issue causing the code has been repaired.

8. Are there any preventive maintenance tips to avoid OBDII code P0078 on a 2005 Infiniti G35?

- Regularly checking and maintaining engine oil levels, addressing any engine performance issues promptly, and following the manufacturer's recommended service schedule can help prevent this code.

9. Can a DIY enthusiast tackle the repair for OBDII code P0078 on a 2005 Infiniti G35?

- While some DIY enthusiasts may be able to address simpler causes like checking connectors or wiring, complex repairs involving component replacement may be best left to professional mechanics.

10. How much can I expect to pay for the repair of OBDII code P0078 on a 2005 Infiniti G35?

- The cost of repair can vary depending on the underlying issue, parts needed, and labor rates, but it is advisable to get estimates from local repair shops for an accurate cost assessment.