5.4 2000 service engine soon codes

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Jun 21, 2005 | 09:08 PM

goofy173

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From: Northern Indiana

5.4 2000 service engine soon codes

I had my codes read and reset at Autozone today. Unfortunately, tonight the 'service engine soon' light returned, so it wasn't the problem I thought it was.

The codes were P0175 and P0172 which are both right and left banks, system too rich. So how is this resolved? Doesn't the computer control this? I'm not having any problems with the engine. I've had it 5 weeks and this is the first times it's came on. It has 93 k miles on it.

Jun 22, 2005 | 11:09 PM

LxMan1

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From: Louisville,Ky.

You might check the fuel pressure regulator. Make sure that there is no fuel coming out into the vacuum line going to it.

Jun 23, 2005 | 08:52 AM

goofy173

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From: Northern Indiana

Thanks, I'll look into it. I just purchased a code reader off of Ebay so I'll see if it's the same codes.

Jun 23, 2005 | 10:35 AM

retired2001

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From: Canyon Lake, Tx. 78133

Another thing you might want to check is the oxyger sensors. If the truck has very many miles, one of them might be bad.

Jun 23, 2005 | 02:30 PM

goofy173

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From: Northern Indiana

OK. It's got 95k miles

Jun 24, 2005 | 01:04 PM

Hoosierdaddy

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From: Valpo, Indiana

my guess is O2 sensors are bad/dirty and causing lean/rich situation since both banks are bad. Replace O2 sensors. Could also be dirty EGR valve which can be removed and cleaned or replaced.

Jun 27, 2005 | 12:20 PM

goofy173

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From: Northern Indiana

I received my code reader Friday, which coincided with my weekly 1000 mile trip. While traveling down I-57 in IL, I plugged it in and this time the code was only Bank 2, too rich. I cleared the code and after 600 miles it has not come on. The only thing I did so far was put 2 cans of STP fuel treatment in it right after the code came on the 2nd time.

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Jun 28, 2005 | 10:36 AM

goofy173

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From: Northern Indiana

Thx. Definitely something for me to look at the first chance I have to take off the inside engine cover.

Jun 30, 2005 | 04:02 PM

#10

l-m tech

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From: duncan oklahoma

have seen the problems with the fuel press. reg,peice of trash causing the press. to stay high.screw on a fuel gauge and check it should be above 32 psi