P2068: Fuel Level Sensor B Circuit High

P2068 is the upper limit fault of the second fuel level sender: its signal sits above anything a working sender can produce, which normally means an open circuit, a lost sender ground or a short to a supply voltage. Ford reports it above 200 ohms, more than 253 A/D counts, using the same 30 s electrical check as for sender A. GM's 2020 dual-tank table needs 100 out of 125 samples with the secondary sender above 60 % of the 5 V span, Type B. Mercedes lists it as P206800, the secondary fill level sender shorted to plus. Ford SSM 52771 covers 2024 Bronco Sport, Escape and Corsair that displayed Fuel Level Low with the MIL and P2068 although the tank was not low; its pinpoint test was rewritten. Because the gauge combines both senders, one bad reading skews the whole display.

Symptoms

• Low fuel warning or empty gauge with fuel in the tank
• MIL on
• Range estimate jumps or is implausible

Most likely causes

• Open signal or ground wire, unplugged sender connector
• Sender card worn through or wiper lifted off the track
• Signal wire shorted to a supply voltage

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the connector and wiring
2. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
3. Use live data to compare the reading with actual conditions
4. Measure power, ground, and signal
5. Replace the sensor if the circuit is good

Good to know

• Repair difficulty: medium
• It affects emissions.

What each character of P2068 means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 0: Subsystem depends on the code range
• 68: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2068?

You can normally keep driving. If it affects the fuel level, do not trust the gauge and refuel earlier than usual.

What causes code P2068?

The most common causes are: open signal or ground wire, unplugged sender connector; sender card worn through or wiper lifted off the track; signal wire shorted to a supply voltage.

Related codes

• P2065Fuel Level Sensor B Circuit
• P2067Fuel Level Sensor B Circuit Low
• P2069Fuel Level Sensor B Circuit Intermittent
• P0463Fuel Level Sensor A Circuit High

Sources

• gsi.ext.gm.com: 20OBDG04 Diagnostics
• newtonnet.co.uk: fordobd2012
• static.nhtsa.gov: MC 11006442 0001
• static.nhtsa.gov: MC 11013179 0001

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.