GM has issued a TSB # 00-06-04-037 to cover the vehicles listed below. The condition could be caused by an intermittent connection in the Input Speed Sensor circuit. The condition is most often found at the 20-pin connector to the wiring harness interface. The input speed sensor produces a signal to the powertrain control module (PCM). If the PCM detects a large change of the input speed signal in an extremely short period of time (less than 0.8 second), it will set a P0716 code and the PCM will direct maximum line pressure. This can result in firm shifts.
If the vehicle is moving at speeds greater than 5MPH and the input speed signal is low or at zero, the PCM will set P0717 and command maximum line pressure.
Do not automatically assume that the input speed sensor is faulty. Instead, thoroughly inspect the wiring harness between the transmission and the PCM. Pay particular attention to the 20-pin connector to make sure it is not stretched tightly. Also make sure that other components are not pressing on the connector body or forcing it open. Check for proper clearance between the connector and other components. Make sure the terminals are fully seated in the connector. Check for bent male terminals or loose female terminals. Also check the crimp on the terminals.
2000-02 Buick Century, LeSabre, Park Avenue, Regal
2002 Buick Rendezvous
2000-02 Chevrolet Cavalier, Impala, Malibu, Monte Carlo, Venture
2000-01 Chevrolet Lumina
2000-02 Oldsmobile Alero, Aurora, Intrigue, Silhouette
2000-02 Pontiac Bonneville, Grand Am, Grand Prix, Montana, Sunfire
2001-02 Pontiac Aztek
For more information on this repair or any others for your vehicle, buy an online subscription to either Alldatadiy.com or eautorepair.net. Click on this link to compare the two services: Compare Alldata and Eautorepair.
If you just need information for a single repair and want to save money,eautorepair offers a lower price 1-week subscription for only $11.99. Or, if you’ll be working on this vehicle in the future, you can buy a 1-year subscription (Alldatadiy.com for $26.99, or eautorepair.net $29.99)
© 2012 Rick MuscoplatPosted on by Rick Muscoplat