[mlipmd]

I also had the INFL REST indicator problem on my car (was on when I bought it), checked the codes, cleaned off both R and L sensor grounds, then the indicator light came on months later and I did it again (not hard but a PIA).The light persisted until I took apart and cleaned the yellow plug connector to the airbag under the driver side dash well under the carpet, as in Dynomite's post #2 above referencing #299 on the CF. One thing I have to add to that post - make sure you disconnect the battery before fussing with that connector as you don't want risking the airbag going off in your face. Also, as I keep saying on here, dialectric grease is an INSULATOR. If you want a good secure connection, use NO-OX-ID grease instead. I haven't had the light go on in maybe 3 years since I did that.
Those impact sensors have very rarely been known to fail and the problem is usually some grounding or electrical wiring problem instead.