1997 BONNEVILLE - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-27-2006, 01:38 PM   #1
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Default 1997 BONNEVILLE

P0171 BANK 1 TOO LEAN

P1870 CIRCUIT SHORT TO BATTERY

P0300 MISFIRES

DOES IT NEED NEW SPARK PLUGE AND O2 SENSOR
1997 BONNEVILLE SE
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Old 11-27-2006, 01:40 PM   #2
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Please do not post in the wrong areas of the forum. Please post in 1992-1999 for mechanical problems.
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Old 11-27-2006, 01:40 PM   #3
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Default Re: 1997 BONNEVILLE

Quote:
Originally Posted by bls1338
P0171 BANK 1 TOO LEAN

P1870 CIRCUIT SHORT TO BATTERY

P0300 MISFIRES

DOES IT NEED NEW SPARK PLUGE AND O2 SENSOR
1997 BONNEVILLE SE
PLEASE DON'T YELL. TURN YOUR CAPS LOCK OFF.

It might need an O2 sensor. Or a fuel pump. Or a fuel pressure regulator, or a fuel filter.
I'd say plugs and wires are a good starting point, and possibly checking your fuel pressure also.
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Old 11-27-2006, 01:46 PM   #4
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>>> Code 1870 is Trans component slipping

And P0300 is random multiple missfire

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Old 11-27-2006, 01:48 PM   #5
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AND...

Do yourself a favor and carefully check your battery connections for corrosion or looseness. Check the connections at the battery and also on the ground ends of your cables. Include looking under the cable boots for corrosion.
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Old 11-27-2006, 01:49 PM   #6
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Hold on there everyone. (Darn..Lash partially beat me to it)

We haven't seen a Lean Bank One code fixed with an O2 sensor lately.

Cheapest suggestions first on this one. Pull your battery cables and clean both ends of all three cables. When you pull the cables off, remove the rubber boots at the battery terminals as well and ensure the crimps are not corroded.

When the engine is not maintaining good voltage, you can see a variety of codes and issues. P0171 is a dead giveaway of bad connection to me.

The diagnostic tips on P0171 in the FSM say to check and clean all battery cables and grounds.

Additionally.. I'll add.. Lean bank one is information the PCM is receiving from the working O2 sensor saying that the exhaust gasses are lean and the PCM is surpassing it'* normal thresholds to richen the exhaust. Then it throws the code to let you know there'* an issue.
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Old 11-27-2006, 02:10 PM   #7
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Quote:
Originally Posted by bls1338
thank you i will see if it work.
i donot one thing about car
You probably don't have a lot of practice using forums either, so hang in there and listen and learn. You need to pull up your existing thread and try posting a reply to it instead of starting a new thread for each reply.

Do you have an Owner'* Manual?

And where are you located?
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Old 11-27-2006, 02:16 PM   #8
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yes i have a owers manual.
ohio
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Old 11-27-2006, 02:23 PM   #9
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OK, well take a good look at those battery cables per the above recommendations and let us know what you find.
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Old 11-27-2006, 02:39 PM   #10
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battery is new but battery cables have black tape on all 3
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