Fuel Level Sensor B Circuit High
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.
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.
Real-world scan data
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
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?+
Can I just clear P2068?+
Related codes
Read & clear P2068 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.