Powertrain
Definition only
P2066: Fuel Level Sensor B Performance
Standardized SAE J2012 code · P20xx — Fuel & air metering and auxiliary emission controls
What does P2066 mean?
Secondary fuel-level sensor B reads within range but plausibility check fails — value sticks, jumps, or does not match consumption.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Float arm sticks
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2066 on the same make and model first.
P2066 in the community
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