Hello, I have 1996 Buick regal 3.8L (live in CA). The car has 181K miles on it. I cleaned the MAF and EGR units allready. I keep getting the following ODB2 faults. P0102, P0401 and P0441.I know what the books says, but I need additional information on the root cause. The car idles a little ruff and when I get on the freeway or driving on a grade at freeway speeds. The car will stutter/ hesitate for a moment. The Check engine light also comes and goes. I can not accept that I have multiple sensors that are bad, but which is the bad one. thank you Juan I'm new to this site and still learning about how to use it |
I have a lesabre with the same engine. I had the same issue. Turned out to bet the TPS. I also cleaned the throttle body. Seemed to help.
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What is a TPS? and where is it located on the engine thanks |
Is the TPS a Throttle Position Sensor. Can I remove it and clean it or do I have to purchase a new one. thanks |
Yes that is correct. On mine located no the Trottle body near the MAP Sensor. You cannot clean it. Sensor is not too expensive. |
How does the TPS sensor cause all of the above faults. Why does not the computer catch the fault at TPS itself. I will purchase a new one, I just like to know? Something else my car does, with the car in PARK, I rev the engine to 4000 RPM and the engine starts to stutter. Thanks Juan |
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