What to do if the throttle position sensor voltage of Buick GL8 is low?
2 Answers
Buick GL8 throttle position sensor low voltage is generally caused by dirt inside the throttle leading to circuit failure. Cleaning can solve the problem, or you can consult local dealers for inspection and repair. Automotive sensors are input devices for the vehicle's computer system, converting various operating condition information such as vehicle speed, temperature of various media, and engine operating conditions into electrical signals transmitted to the computer, ensuring the engine operates in an optimal state. The Buick GL8 is a business vehicle under the Buick brand, featuring a new-generation Buick wing-shaped chrome-plated front grille with an elegant and grand appearance. Its body dimensions are 5219mm in length, 1878mm in width, and 1776mm in height, with a wheelbase of 3088mm. In terms of power, the Buick GL8 is equipped with a 2.5L SIDI all-aluminum intelligent direct injection engine featuring dual VVT and in-cylinder direct injection technology, delivering a maximum power of 147kW and a maximum torque of 253Nm, paired with a 6-speed DSS intelligent automatic manual transmission.
Recently, my car had the same issue. Low throttle position sensor voltage is quite common in the Buick GL8. It's mostly due to sensor aging or wear, or loose wiring causing increased resistance. When the voltage is low, the engine warning light will come on, and you'll feel sluggish acceleration and increased fuel consumption. I suggest first asking a friend to help read the fault codes with a diagnostic tool to confirm if it's a sensor problem. If confirmed, you can try cleaning the sensor contacts or connectors—sometimes dust buildup can cause false readings. But don't mess with it yourself; replacing a new sensor isn't expensive, just a few hundred bucks, and you can go to a regular repair shop. They can also check the wiring and ECU matching to ensure a permanent fix. Remember, address it early to avoid more serious engine problems—safety first when driving.
