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Check engine light need smog for renewal registration.

Check engine light need...

Check engine light need smog for renewal registration. Coming up lean bank 1 and 2

Mechanic's Assistant: Does the light stay on, or does it blink?

Come on and goes off randomly

Mechanic's Assistant: What is the model/year of your Pontiac?

2005 pontiac bonneville gxp

Mechanic's Assistant: Are you fixing your Bonneville yourself? What have you tried so far?

No I dont work on it myself. Mom of 6 only can so the regular maintenance. Havent tried anything thus far

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Answered in 14 minutes by:
3/14/2018
Gary
Gary, ASE Certified Technician
Category: Pontiac
Satisfied Customers: 1,922
Experience: Senior Technician
Verified

Hello! My name is Gary.
Welcome to JustAnswer.
I'm reviewing your question now, and will post back with a reply shortly.

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You say lean on both banks, what are the codes please?

Can you check your fuel cap is on securely, and same for the oil cap on the engine.

Gary

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Customer reply replied 4 months ago
Replaced fuel cap and still having issue
Customer reply replied 4 months ago
P0174 and P0171

Ok.

Yes P0171 and P0174 are lean both banks.

It possibly has an unmeasured air leak after the MAF, Mass AirFlow sensor.

Could be any of the inlet ducting, to a vacuum leak in the inlet manifold etc.

Could also have some dirty injectors, or high carbon buildup in the cylinder heads.

Gary

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Customer reply replied 4 months ago
Ok thanks

I would think you need to see a workshop now, but good on you for doing some easy checks first.

Gary

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Hello again,

Do you need any further help?

I hope my advice has been of assistance to you.

Kind regards

Gary

Gary
Gary, ASE Certified Technician
Category: Pontiac
Satisfied Customers: 1,922
Experience: Senior Technician
Verified
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