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Chevrolet Impala Starting/Stalling Problems
45 messages, Last post on Jan 30, 2013 at 6:14 PM
You are in the Chevrolet Impala Forum.What is this discussion about? Chevrolet Impala, Sedan
#44 of 45 Stalled start, slightly fluctuating rpms, pf420 inefficiency below thresh by ctp2001imp
Jan 30, 2013 (6:07 pm)
Every time I go to start my 2001 Chevrolet Impala, it takes at least three tries before it cranks. its giving me what I remembered being a pf420 code below threshold. I replaced my o2 censor before the cat converter but no cigar. I also believe my alternator is falling behind because the brightness of all of the interior and ext lights fluctuates as well.I was told it was probably a crank sensor but wanted a second opinion before I go spending that money.
- nick2006matrix (Jan 30, 2013 6:14 pm)
Replies to this message:
#45 of 45 Re: Stalled start, slightly fluctuating rpms, pf420 inefficiency below thresh [ctp2001imp] by nick2006matrix
Jan 30, 2013 (6:14 pm)
Replying to: ctp2001imp (Jan 30, 2013 6:07 pm)
I assume you meant P0420 in your post. I did not see any mention of the crank sensor in this information: http://www.obd-codes.com/p0420 They mention a faulty cat or a faulty O2 sensor. The sensor after the cat is reading the same as the sensor before the cat.
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