Lexussc400777 Posted January 25, 2013 Share Posted January 25, 2013 I have a Lexus sc400 with about 1000 miles.recently I notice problem with going over 40mph on the free way an riding a little roughly I recently replace the sparks an wires still notice the problem.next day I wasn't able to pick up little speed if any rough idle when I first start it an it also stalls an hesitate when I try to pic up speed got a diagnostic test cold 31 and 25 replaced mass flow air sensor steel notice hesitation lost power rough idling an motor stalling any suggestions about T PS sensor any feedback will be helpful Thanks Quote Link to comment Share on other sites More sharing options...
BangEmBoy Posted February 4, 2013 Share Posted February 4, 2013 Seems like you and I are in the same boat .. Just for the record, your two(2) code's (25 & 31) means that you have a lean condition (25), and 31 is the MAF sensor . Seeing that you have already changed the MAF sensor and are still getting the code, I would check and see if you have the proper signal from the ECU . If you check out my post, my mentor/friend SRK gives some excellent feedback on my issue's which have the same code's as yours . Our problem has been experienced by other's, and I am combing the post to find a solution . I will keep you posted on anything that I find . Quote Link to comment Share on other sites More sharing options...
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