Question about 1992 Buick Park Avenue
Say techs..of older iron...1992 Buick Park ave. Ultra 3800 supercharged. got a code 21..replaced tps..set up closed throttle reading @ .38 of a volt. cant get the ck.engine light to go out..or realize overdrive. driving me crazy..,! any suggestions...thanks in advance for any ideas...theroad
The code indicates the TPS is still bad and the code is usually right, but it could be a wiring issue at the TPS connector or less likely a computer issue.
To test the TPS circuit, you need to check voltage and ground from the ECM - 5v is the normal reading between the ECM reference circuit and the ECM ground circuit at the TPS connector. Checking the TPS signal circuit to the ECM requires monitoring the TPS signal on a scan tool while jumping the 5v reference and the signal circuits. The TPS reading should go from high when the circuit is jumpered to low when the jumper is removed.
Posted on Feb 10, 2018
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Posted on Jan 02, 2017
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