Your Pontiac Fiero engine control system detects a problem, the computer stores the diagnostic trouble
code C3489 in its memory.
To figure out what is wrong with your vehicle you must first extract the C3489 DTC For Pontiac Fiero.
A good ground connection is also extremely important. C3489 Pontiac Fiero 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).
C3489 Pontiac Fiero DTC Meaning
Chassis Code - Problem is controller area network wiring bus and modules.
SAE - Generic
Fuel And Air Metering (Injector Circuit Malfunctions Only)
Crankshaft Position Sensor Circuit Performance
A/C System High Pressure High Temperature
The original multi-displacement system turned off opposite pairs of cylinders, allowing the engine to have three different configurations and displacements. C3489 Pontiac Fiero code had an elaborate diagnostics procedure, including showing engine trouble codes on the air conditionning display. However, the system was troublesome, misunderstood by customers, and a rash of unpredictable failures led to the technology being quickly retired.