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How bad is it to drive while OBDII (not fiero) is showing lean? by linenoise
Started on: 12-11-2003 05:10 PM
Replies: 5
Last post by: linenoise on 12-12-2003 09:10 AM
linenoise
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Report this Post12-11-2003 05:10 PM Click Here to See the Profile for linenoiseClick Here to visit linenoise's HomePageSend a Private Message to linenoiseDirect Link to This Post
2000 Old Alero, Service Engine soon light came on while traveling far from home, nearest dealership plugged in scanner and it shows lean on bank2, They think it's just the o2 sensor and okayed me finishing my trip before serving. should I worry about anything?
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Steve Normington
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Report this Post12-11-2003 05:21 PM Click Here to See the Profile for Steve NormingtonClick Here to Email Steve NormingtonSend a Private Message to Steve NormingtonDirect Link to This Post
Is it still under warranty? If so, get it in writing that it is okay to drive. That way, if it fails, you can make them pay for it. Running lean can do all sorts of nasty things to an engine. If not under warranty, replacing an O2 sensor is relatively easy. Get that done and see if the problem goes away.
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linenoise
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Report this Post12-11-2003 05:23 PM Click Here to See the Profile for linenoiseClick Here to visit linenoise's HomePageSend a Private Message to linenoiseDirect Link to This Post
 
quote
Originally posted by Steve Normington:

Is it still under warranty? If so, get it in writing that it is okay to drive. That way, if it fails, you can make them pay for it. Running lean can do all sorts of nasty things to an engine. If not under warranty, replacing an O2 sensor is relatively easy. Get that done and see if the problem goes away.

under warranty for another 50K! and I got it in writing that they inspected and ok'd for my return trip home.

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Darth Fiero
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Report this Post12-11-2003 09:37 PM Click Here to See the Profile for Darth FieroClick Here to visit Darth Fiero's HomePageClick Here to Email Darth FieroSend a Private Message to Darth FieroDirect Link to This Post
Linenoise, part of the OBDII government mandate addresses the Service Engine Soon light and its operation. From what I understand of this mandate, this is what it says:

A steady-on SES light means the PCM has detected a fault, but the car can be operated safely and should be serviced in a reasonable amount of time.

A flashing SES light means the PCM has detected a fault (usually misfire) which can result in permanent damage to the emissions system.

As far as I know, this applies to ALL OBDII vehicles. In contrast, transmission slipping codes usually don't show up as "flashing" SES light codes (even though this is a sign of a damaged or malfunctioning component), just steady-on, but the modern computers can take action and make the appropriate adjustments to either the engine power output or shift pattern of the transmission to prevent further damage. Basically, the EPA mandated rules for OBDII don't care about anything other than the emissions output of your vehicle so you will probably never see the check engine light flash unless you have a detected misfire, or a fault that can cause additional emissions to come out of the tailpipe.. In which case, you will want to get it fixed right away unless you like replacing catalytic converters.

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[This message has been edited by Darth Fiero (edited 12-11-2003).]

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silver86se
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Report this Post12-11-2003 11:23 PM Click Here to See the Profile for silver86seSend a Private Message to silver86seDirect Link to This Post
hi if a lean condition in a fiero v6 makes the manifolds glow red red!!!. i would imagine what it can do to your newer car . i would not drive it, if dealer checked it and said it could be oxegen sensor, then you should have it changed right there, cheaper than more expensive damage down the road..good luck ...

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1986 Pontiac Fiero SE, 67k original miles, V6, Auto, AC, PB, PDrlks,Pwr windows, Sunroof, Silver body and black aero/gt trim, Factory Aero nose,Factory Wing and Alloy Wheels, 205-14-70, Optional Factory Guages. Mostly original stock. Remember those who serve our Country! currently under going minor repair/over winter project.

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linenoise
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Report this Post12-12-2003 09:10 AM Click Here to See the Profile for linenoiseClick Here to visit linenoise's HomePageSend a Private Message to linenoiseDirect Link to This Post
 
quote
Originally posted by silver86se:

hi if a lean condition in a fiero v6 makes the manifolds glow red red!!!. i would imagine what it can do to your newer car . i would not drive it, if dealer checked it and said it could be oxegen sensor, then you should have it changed right there, cheaper than more expensive damage down the road..good luck ...

Cost here is not the problem, Time is traveling for work (server lost hard drives) so I can't take the time to leave with a dealer for a day or two.

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