Your Chevrolet Alero engine control system detects a problem, the computer stores the diagnostic trouble
code C3984 in its memory.
To figure out what is wrong with your vehicle you must first extract the C3984 DTC For Chevrolet Alero.
A good ground connection is also extremely important. C3984 Chevrolet Alero engine problem because the presence of voltage at the panel harness won't make the panel work if there is a bad ground connection. Since the instrument cluster is mounted in a plastic dash, a separate ground wire or ground circuit through the wiring harness is usually needed to complete the power circuit. Refer again to the wiring diagram to find the ground path, and then check it with your ohmmeter. Do not use a self-powered test light because it cannot measure resistance (any resistance will lower circuit voltage).
C3984 Chevrolet Alero DTC Meaning
Chassis Code - Problem is controller area network wiring bus and modules.
SAE - Generic
Crankshaft Position Sensor Circuit Performance
Cruise Vehicle Speed/Set Speed Difference Too High
The C3984 Chevrolet Alero Check Engine lamp is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. C3984 diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks C3984 DTC For Chevrolet Alero with your car's computers to find out exactly what's prompting the light to turn on.