P2066 on Chevrolet
Fuel Level Sensor "B" Circuit Range/Performance
P2066 on Chevrolet vehicles indicates fuel level sensor "b" circuit range/performance. Au7o has documented this code across 1 Chevrolet model — most commonly on Tahoe. Set when the Fuel Level Sensor 'B' signal is present but implausible or does not track expected fuel usage compared with the primary sender, indicating a performance problem rather than a hard open/short. Typical repair costs on Chevrolet range from $400 to $1,400, depending on the specific model and root cause.
Common Causes of P2066
- •Worn or sticking fuel level sender float/rheostat
- •High-resistance wiring or ground
- •Debris/contamination affecting the float
- •Faulty fuel level sensor 'B'
- •PCM/ECM fault (rare)
P2066 on Chevrolet by Model
Chevrolet Tahoe(1 issue)
- Fuel Level Sensor / Sending Unit Failure (Erratic Fuel Gauge)2007-2014
The in-tank fuel-level sender's resistive card wears, causing the fuel gauge to read inaccurately — stuck on Empty or Full, bouncing/fluctuating, or dropping to E with a false low-fuel warning. The sender is integral to the fuel pump module, so a worn card typically means dropping the tank. It is a well-known GM truck problem; on high-mileage trucks technicians recommend replacing the complete fuel pump module rather than just the sender.
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View P2066 across all makes →Frequently Asked Questions
What does P2066 mean on Chevrolet?▼
P2066 stands for "Fuel Level Sensor "B" Circuit Range/Performance." Set when the Fuel Level Sensor 'B' signal is present but implausible or does not track expected fuel usage compared with the primary sender, indicating a performance problem rather than a hard open/short. On Chevrolet specifically, this code is documented across 1 model.
What causes P2066 on Chevrolet vehicles?▼
Common causes on Chevrolet: Worn or sticking fuel level sender float/rheostat, High-resistance wiring or ground, Debris/contamination affecting the float, Faulty fuel level sensor 'B', PCM/ECM fault (rare). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2066 on a Chevrolet?▼
Repair costs on Chevrolet range from $400 to $1,400, depending on the specific model and root cause.
Which Chevrolet models have P2066 documented?▼
Au7o has documented P2066 on 1 Chevrolet model: Tahoe.