Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1998A8 SEDAN (4D2) V8-3.7L (AEW)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSFUEL LEVEL STATUS, CHECKING
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)
Fuel Level Status, Checking
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)SECTION Fuel Level Status, Checking
NOTES:
- If little fuel remains in the fuel tank, less than approx. 12 liters (3 gallons), misfiring and fuel system malfunctions can result. Also, the malfunction "Fuel Level too Low" (SAE P1250/VAG 17658) may be stored in Diagnostic Trouble Code (DTC) memory.
- The malfunction "Fuel Level too Low" is always recognized and stored when there are misfiring or fuel system malfunctions.
- As a rule, always eliminate the misfiring and other fuel system malfunctions first.
- Fill fuel tank with at least 20 liters (5-1/2 gallons).
- Check DTC memory and erase.
- Generate readiness code. Readiness Code, Generating
- Road test.
- Check DTC memory. Reading Diagnostic Trouble Codes
If "Fuel Level too Low" is the only malfunction stored in DTC memory (SAE P1250/VAG 17658).
- Connect VAG 1598/19 test box to ECM harness connector. Connecting VAG 1598/19 Test Box
- Check wiring for short circuit to Ground between ECM/test box socket C8 and instrument cluster.
See Electrical Wiring Diagrams, Troubleshooting and Component Locations.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.