Still having P0004 code

JEEPLIFE808

MEMBER
2006 JEEP LIBERTY
3.7L
V6
4WD
AUTOMATIC
180,000 MILES

I recently changed all my o2 sensors both upstream and downstream sensors, did a spark plug change, oil change and still having p0004 code.I have spent a lot of money trying to fix this problem and my vehicle doesn't want to erase code. Getting frustrated. Any suggestions/recommendations? I love my vehicle a lot. Also have clicking noise when reversing it doesn't look like my ball joints.

6 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

There are no P0004. Can you verify the code for me?

I attached a wiring diagram of the system for you to view. The light will not clear until the correct repair is done.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Roy

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Sunday, April 4th, 2021 AT 1:35 PM

JEEPLIFE808

MEMBER
2 POSTS

Saying fuel volume regulator, control circuit range/performance.

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Sunday, April 4th, 2021 AT 1:59 PM

STEVE W.

MECHANIC
13,572 POSTS

I would say you have an ECM issue. There is no fuel volume regulator or even a pressure sensor on the fuel rail of that Jeep. It has a pressure regulator as part of the pump but doesn't monitor the actual pressure. It almost has to be an internal ECM issue. It's possible that re-flashing the ECM would clear it but that would be about the only way.

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Sunday, April 4th, 2021 AT 4:03 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

We need the actual code number to help. It will be in the form of P and some numbers.

Roy

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Sunday, April 4th, 2021 AT 4:09 PM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

P0004 is a generic OBD-II code indicating an issue with the engine control module (ECM) not reading signals from your fuel shut-off on your fuel injection rail mounted to your engine. The ECM uses the fuel shut-off valve to stop fuel from entering the engine when you turn it.