P2068
Fuel Level Sensor B Circuit High
Fuel level sensing
Generic OBD-II
Low
What it means
P2068 means the PCM sees a too-high voltage on the "B" fuel level sensor circuit, usually from an open or short-to-power. This sensor is one of the tank sending units that feed the fuel gauge. The fault makes the gauge inaccurate but does not affect how the engine runs — there is no no-start risk. Watch your actual mileage so you don't run out of fuel.
Low
Can I keep driving? Safe to drive — the engine runs fine; the main risk is an inaccurate fuel gauge, so don't rely on it to avoid running out.
Common symptoms
What you'll notice
- Check-engine light on
- Inaccurate or stuck fuel gauge
- Fuel gauge may read empty or full incorrectly
- Possible false low-fuel warning
Common causes
Most likely first
- Fuel level sensor B circuit shorted to power or openLikely
- Faulty fuel level sensor B (sending unit) in the tankCommon
- Corroded or loose connector at the sensor or fuel pump moduleCommon
- Faulty instrument cluster / combination meterLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and inspect the fuel level sensor wiring and connector for opens or shorts.
- Check the sensor's signal voltage against tank level; a persistently high reading points to an open or short-to-power.
- Repair damaged wiring or a corroded connector at the pump module.
- Replace the fuel level sensor / sending unit if it reads out of range.
- If the sensor and wiring are good, have the instrument cluster checked. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2068?+
Yes — the engine runs normally. The catch is you can't trust the fuel gauge, so track your mileage to avoid running out of fuel.
Can I just clear P2068?+
It returns until the sensor or wiring is repaired; clearing only confirms a completed fix.
Related codes
Often seen with P2068
Read & clear P2068 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX