How to Fix Code 84 Fault in Buick Excelle?
3 Answers
It might be an issue with the throttle body or accelerator pedal. A computer scan is needed to determine the exact cause. It's recommended to visit a repair shop to read the fault codes with a diagnostic tool. The throttle body is a valve that controls the air intake into the engine, playing a crucial role in vehicle operation. It's advisable to replace it with a new one. Applying lubrication to the accelerator pedal or replacing it with a new one should resolve the issue.
A few days ago, my Buick Excelle also displayed the code 84 fault, with noticeably reduced power and jerking during acceleration. I first checked the electronic throttle pedal, using a multimeter to test if the resistance values were normal. Then, I focused on the throttle position sensor and found the connector was a bit loose. Actually, this fault is mostly due to sensor signal issues. After disassembling the throttle body myself to clean the carbon deposits and using an OBD tool to clear the code, the problem was resolved. If the error persists after cleaning, it's recommended to directly replace the throttle position sensor part. You can get an original part online for just over 300 yuan. Remember to test drive on the highway after the repair to observe if the fault light reappears.
Don't panic when encountering code 84, as this typically indicates an electronic throttle control system malfunction. My troubleshooting approach involves three steps: First, inspect the throttle pedal sensor wiring for wear, especially the wiring harness under the driver's seat which is prone to aging. Then, test whether the throttle motor resistance falls within the normal range of 4-6 ohms. Finally, use a diagnostic tool to check real-time data streams. A crucial reminder is to inspect the 10A ETC fuse in the fuse box - I once found a blown fuse causing false alerts. If you lack the equipment, promptly visit a repair shop to read the trouble codes rather than forcing operation to avoid engine damage.
