A local auto parts store will usually pull the code from your check engine light for free, but the ani-lock light can only done by the dealership.
Throttle body
How to install tps
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should be right underneath the throttle body to the right of the intake.
To adjust the throttle position sensor (TPS) on a 1987 Buick Century with a 3.8-liter engine, first, locate the TPS mounted on the throttle body. Use a multimeter to check the voltage output of the sensor, which should be between 0.5 to 0.6 volts at closed throttle. Loosen the screws securing the TPS, and rotate it slightly until the voltage reading is within the specified range. Once adjusted, tighten the screws securely and recheck the voltage to ensure it remains within the desired range.
It is located just under the throttle body on the intake manifold. Follow the wiring harness and you will see where it sets underneath the throttle pulley assemply on the front right side of the motor.
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The throttle position sensor (TPS) on a 2000 Buick Century is an electronic device that monitors the position of the throttle valve in the engine's intake system. It sends this information to the engine control unit (ECU), which uses the data to adjust fuel injection and ignition timing for optimal engine performance. Proper functioning of the TPS is crucial for maintaining smooth acceleration and overall engine efficiency. A faulty TPS can lead to issues such as poor fuel economy, erratic idling, or stalling.
The low tire pressure light on a 2002 Buick Century is reset by pressing the red button in the passenger fuse box. The light will return if the pressure problem is not fixed or if the leak comes back.
It is quite likely it is the anti-lock brakes activating. When any wheel loses traction while braking the brakes will be pulsed so that the car will not go into a slide. When driving on slippery roads, you are suppose to pulse your brakes to stop. The antilock system does this for you.
I'd suspect a loose, damaged or unhooked vacuum hose/line around the upper/lower intake. Or a faulty throttle position sensor.