1999 Chevy Blazer Engine Service Soon light on

1999 CHEVROLET BLAZER

GINAMANFREDO

MEMBER
2 POSTS

Engine Mechanical problem
1999 Chevy Blazer 6 cyl Automatic
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I sent the car to the mechanic and they fix a problem with gas regulator. Now, the engine service soon light is on and when they scan the code P0171 and P0174 shows up. They already check the oxygen sensor and its ok. Also they clean the inyections. Could you help?

Jun 20, 2008 at 6:23 PM

OBXAUTOMEDIC

✓ASE Certified Mechanic
3,711 POSTS

[quote:803d6e3fb7="ginamanfredo"]Engine Mechanical problem
1999 Chevy Blazer 6 cyl Automatic
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I sent the car to the mechanic and they fix a problem with gas regulator. Now, the engine service soon light is on and when they scan the code P0171 and P0174 shows up. They already check the oxygen sensor and its ok. Also they clean the inyections. Could you help?[/quote:803d6e3fb7]

Ok, you say you had the fuel pressure regulator replaced. What was the problem with the vehicle for you to take it in to be checked?

Did they check the fuel pressure?

When did they check the O2 Sensors? There are I believe 2 maybe 3 O2 Sensors. 1 in each exhaust manifold and possibly 1 either before or after the Catalitic Converter.

Jun 26, 2008 at 5:48 PM

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