P2069: Fuel Level Sensor B Circuit Intermittent

P2069 covers brief dropouts on the second fuel level sender: the signal leaves its valid window for moments and comes back, too short for a hard low or high fault. Mercedes is the one maker found to document it, as P206900 in the FSCM_GEN4 fuel pump control unit, a sporadic malfunction of the secondary fill level sensor; a 2025 Mercedes bulletin on implausible gauge readings has connectors and harness routing checked. Ford handles a jumpy sender B under P2066 instead, so on Ford vehicles P2069 is unlikely. Behind such faults are worn spots on the sender card where the wiper loses contact, connectors at the tank flange that move with the body, or a harness rubbing on a bracket. CARB requires fuel level inputs to be monitored. The gauge may twitch and the low fuel light may flicker on and off.

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

Symptoms

Fuel gauge needle twitches or drops briefly
Low fuel light flickers on and off
Intermittent MIL

Most likely causes

Worn spot on the sender card at the usual fuel level
Loose or corroded terminal at the tank flange connector
Harness rubbing on a bracket or tank strap

What to check, in order

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

Check the connector and wiring
Gently move the wiring with the engine running and watch whether the reading changes.
Use live data to compare the reading with actual conditions
Measure power, ground, and signal
Replace the sensor if the circuit is good

Good to know

Repair difficulty: medium
It affects emissions.

What each character of P2069 means

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

Frequently asked questions

Can I keep driving with code P2069?

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

What causes code P2069?

The most common causes are: worn spot on the sender card at the usual fuel level; loose or corroded terminal at the tank flange connector; harness rubbing on a bracket or tank strap.

Related codes

Sources

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.