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.
DTC Parameters
DTC sets if the difference between two averaged fuel level sensor readings is more than plus or minus 3.17 gallons (12 liters) from an ECM calculated fuel consumption (based on injector pulse width) of 3.70 gallons (14 liters). The calculated 3.70 gallons (14 liters) is consumed between the two average readings. The 3.70 gallon (14 liters) can be consumed between ignition cycles. If the ECM detects that a refueling event has occurred, the 3.70 gallon (14 liters) fuel consumption is started over. The 3.70 gallons (14 liters) must be consumed in order to PASS the diagnostic.
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Use the Manual With the Right Hardware
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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.