Problem with my 2001 Pontiac Grand Am
3.4
check engine light
codes = lean
tip/donation yes
tech = jk
question = why does my grand am has a check engine light come on. I had the codes
pulled from a scanner at Autozone. They said it was p0171 and i need an oxygen
sensor. Do you think this right? How do i replace it. Where exactly is it. Thank you very
much.
JK:
Thank you for the tip/donation. It is possible that the oxygen sensor is bad. First you
should check for a vacuum leak. Some common areas of vacuum leaks on that engine
are the PCV hose, evaporative system purge solenoid valve, or upper intake manifold
gaskets. A loose air intake duct can also cause this. If there are no vacuum leaks
found, then yes, it does sound like a bad oxygen sensor.
Thanks again for tip/donation. I will send some pics of these areas to check for vacuum
leaks, and location of the oxygen sensor this code refers to.
3.4
check engine light
codes = lean
tip/donation yes
tech = jk
question = why does my grand am has a check engine light come on. I had the codes
pulled from a scanner at Autozone. They said it was p0171 and i need an oxygen
sensor. Do you think this right? How do i replace it. Where exactly is it. Thank you very
much.
JK:
Thank you for the tip/donation. It is possible that the oxygen sensor is bad. First you
should check for a vacuum leak. Some common areas of vacuum leaks on that engine
are the PCV hose, evaporative system purge solenoid valve, or upper intake manifold
gaskets. A loose air intake duct can also cause this. If there are no vacuum leaks
found, then yes, it does sound like a bad oxygen sensor.
Thanks again for tip/donation. I will send some pics of these areas to check for vacuum
leaks, and location of the oxygen sensor this code refers to.
Other related articles:
Check Engine / Service Engine Soon / SES light
Todays GM vehicles use many sensor, switches, solenoids, and other electrical components to control or
monitor every aspect of the engine.
From controlling the fuel and ignition systems, to monitoring the emissions.
A problem in any of these systems, or subsystems, can cause the check engine light to come on.
The first step in any diagnosis of the check engine light is to get the computer (PCM or ECM) scanned for
codes. Any time this warning comes on, a code is stored in the computer memory along with many data
parameters that were present at the time of the fault.
Todays GM vehicles use many sensor, switches, solenoids, and other electrical components to control or
monitor every aspect of the engine.
From controlling the fuel and ignition systems, to monitoring the emissions.
A problem in any of these systems, or subsystems, can cause the check engine light to come on.
The first step in any diagnosis of the check engine light is to get the computer (PCM or ECM) scanned for
codes. Any time this warning comes on, a code is stored in the computer memory along with many data
parameters that were present at the time of the fault.
Check Engine Light Lean Code
| 12-31-10 my car was fine until i got a tune up now car shakes and cuts off and also every light possible comes on two mechanics say i need an engine please help what should i do |
Comments
| Dont see how a tune up can cause all these problems. It is possible that they did an oil change and the filter is wrong or faulty and it plugged up an oil passage in the cylinder head, and now there is no oil pressure to the top of engine. This causes engine noise and running bad, but that is just a guess. We need to know what codes are stored in all those computers. |
| 2-17-11 will the o2 sensor make it bark down in rpms |
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