Question about Cars & Trucks
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: 2001 cavalier codes
P0621 - indicates a failure in the alternator lamp curcuit.
P0304 - indicates a miss fire was detected in the #4 cylinder
U1040 - indicates a loss of communication with the ABS system
U1000 - Indicates a class 2 communication loss
None of those codes are relating to a transmission failure (P0700-P0702)
I would have a visual look at the transmission and verify that all electrical wires are connected and tight. Then I would have the transmission serviced if it hasn't been within the last 35,000 miles.
Have the trouble codes cleared and address the ones that return.
After that you may be looking at an internal transmission adjustment and/or repair.
Posted on Nov 24, 2008
It is a sign that you either have a bad wheel bearing or 1 off your speed censors on 1 of the tires is bad, I just had this problem with my olds alero, but it was a wheel bearing that needed replaced.
Posted on Jan 24, 2010
SOURCE: 2001 Olds Intrigue 3.5L engine.
Code P0171 - mixture too lean. Basically this means that the oxygen sensor detected a lean condition (too much oxygen in the exhaust).
One or more of the following has happened:
1 - the MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
2 - there could be a vacuum leak downstream of the MAF sensor - a pipe might be broken or leaking at the joint.
3 - the fuel lines, filter or/and injectors might be dirty.
These are the solutions:
1 - in the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for its location but it's usually easy to find - it's situated between the air filter and the intake manifold right next to the accelerator flap. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
2 - inspect all vacuum and PCV hoses, replace if necessary.
3 - check for a dirty fuel filter and proper fuel pressure, use a cleaner additive or even have the injectors professionally cleaned, if necessary.
Posted on Jan 21, 2011
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