U0676 code meaning
Lost Communication With Fuel Level Sensor A
Network system Generic code U06xx codes Check engine light
What U0676 means
Fuel level sensor A is the main tank sender. Usually it is a float-driven resistor read as a voltage, and U0676 only applies where the sender itself reports digitally and its messages stop. Public documentation of this code from any manufacturer is lacking. In its 2024 summary Ford treats sender A as a resistance: below 5 ohms or above 200 ohms within 30 s are circuit faults, more than 100 jumps of over 40 % are noise, and stuck checks need 100 to 120 miles. GM's 25OBDG03A lets the float feed the engine controller directly or a fuel tank zone module, which forwards the value, and pauses its range checks while a communication fault is active. CARB needs the level for EVAP testing and misfire disablement at low fuel, so the gauge may be wrong and those monitors stay incomplete.
U0676 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0676
- Fuel gauge reads empty, full or freezes
- Range display missing or wrong
- Check engine light, EVAP readiness not set
Common causes of U0676
- Most likelyWiring at the tank or fuel pump flange damaged or corroded
- PossibleElectronics of the level sender failed
- PossibleModule that reads or forwards the level faulty
- Less likelyConnector under the vehicle not latched or water-damaged
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel level sensor aVehicle bus wiring
What each part of U0676 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 76 | The exact fault in that area. |
What to do next
- Note U0676 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0676
What does U0676 mean?
U0676 means "Lost Communication With Fuel Level Sensor A". Fuel level sensor A is the main tank sender. It is a generic code, so it means the same on every make.
Is it safe to drive with U0676?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will U0676 fail an emissions test?
Yes, it can. U0676 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U0676 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U0676 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.