Two DTcs -- While data logging TPS voltage is -3.4V ???
04-05-2008, 06:30 PM
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Two DTcs -- While data logging TPS voltage is -3.4V ??? My TPS is showing me that it ranges from -3.4V to 86.0V... I have always that that at startup, the PCM sets closed throotle with TPS = 0.0, and max is 5.0V. Do I have this wrong?
I am getting two DTCs --- P0101 and P0121. Could the negative volts from the TPS be causing both codes? There seems to be nothing wrong with the MAF. I even swapped in a known good MAF and still get both codes.
What do I do? I am thinking that the TPS is faulty. Is there a reset for the TPS so that it starts at 0.0V at closed throotle?
BTW: I just swapped in an LS2 402 stroker short block.
I am getting two DTCs --- P0101 and P0121. Could the negative volts from the TPS be causing both codes? There seems to be nothing wrong with the MAF. I even swapped in a known good MAF and still get both codes.
What do I do? I am thinking that the TPS is faulty. Is there a reset for the TPS so that it starts at 0.0V at closed throotle?
BTW: I just swapped in an LS2 402 stroker short block.
Last edited by Doc99SS; 04-05-2008 at 06:42 PM.
04-06-2008, 07:32 PM
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Well, I figured out the -3 to 86V TPS output business,,, the units are in degress not volts, even though the header says "TPS Voltage".
Concerning the MAF inconsistent readings: I read somewhere that EGR could be bad or I am getting unmetered air (maybe via the EGR).
Concerning the MAF inconsistent readings: I read somewhere that EGR could be bad or I am getting unmetered air (maybe via the EGR).
