Tps sensor and mass air flow senspr low voltage. Help gurus.
10

Asked by jcolson10210 May 18, 2015 at 08:20 PM about the 2002 Pontiac Grand Prix SE

Question type: Maintenance & Repair

So I did a cat delete replaced all spark plugs
and wires now have a tps sensor low
voltage and mass air flow sensor low
voltage and random multiple misfires.
Could it be something simple or am I
tearing into the firewall to find the break? I
can unplug both sensors and the car stays
running plus two others idle sensor maybe
and another. 2002 grand prix 3100 series

3 Answers
1,565

Tooloose answered 9 years ago

Unplug Both o2 sensors upstream and down stream One at a time. While you monitor the mass air, and Tps signal voltage you will find that one of them, the heater circuit is shorted.

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