Circuit Description
WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
Fuel level sensor No. 2 measures fuel level changes within right fuel tank. When fuel level is low, sensor output voltage is high. When fuel level is high, sensor output voltage is low.
PCM uses inputs from fuel level sensor No. 1 (left side) and fuel level sensor No. 2 (right side) to calculate total fuel remaining in both tanks. This information is sent via serial data to BCM to be displayed on fuel gauge.
Diagnostic checks for stuck fuel level sensor No. 2 signal. If PCM determines fuel level signal appears to be stuck based on lack of signal variation, DTC will set.
DTC will set when following conditions are present:
- Secondary fuel tank is not empty.
- More than 150 miles have been accumulated.
- PCM does not detect that fuel level in right fuel tank moved by at least.80 gallon.
Or
- Secondary fuel tank is not empty.
- Primary fuel tank is not full.
- Engine operating greater than 60 minutes.
- Primary tank does not achieve the top of its range.
Or
- Secondary fuel tank is not empty.
- Primary fuel tank is not full.
- Fuel level in both tanks does not change after travelling more than 200 miles.