First, let me advise you not to chase down problems by replacing parts. That is expensive and never works. Always test parts before replacing them.
Now for your issue, it's almost impossible for all of these sensors to fail at the same time. So your problem is in the wiring harness, the computer or bad grounds in the electrical system.
Your grounds are easiest to check, so start there. Check all cables for breaks/high resistance. Check all connections at frame, engine and body for looseness/corrosion.
If they all check out, move to wiring harness. You'll need to get a diagram that shows colors/connector views. Trace the wires/connectors with a volt/ohm meter looking for breaks and high resistance. (Don't forget a visual inspection for broken/bent pins in connectors and for burnt wires in harness)
If harness checks out, check computer by first making sure it's grounds are good as well as the connectors are all tight. If they're good, your computer is bad.
Wednesday, February 9th, 2011 AT 1:28 PM