What Does P2068 Mean?
The fuel level sensor B circuit is reading a voltage higher than the expected maximum threshold. This indicates either a wiring fault causing high voltage or a failed fuel level sensor sending unit.
Common Causes
35%
Open circuit in fuel level sensor B wiring harness or connector
30%
Faulty fuel level sensor B sending unit stuck at high resistance position
20%
Corroded or damaged fuel pump module connector pins
10%
Short to voltage in sensor circuit wiring
5%
PCM internal fault in fuel level input circuit
Diagnostic Steps
1
Step 1: Inspect fuel tank connector for corrosion, damage, or loose connections and repair as needed
2
Step 2: Backprobe fuel level sensor B circuit and measure voltage with key on, engine off (should be within 0.5-4.5V range)
3
Step 3: Drop fuel tank and access fuel pump module, inspect sensor B float arm for binding or damage
4
Step 4: Test fuel level sensor B resistance across full range of motion (should vary smoothly from ~10-180 ohms)
5
Step 5: If sensor tests good, check wiring harness for opens or shorts to voltage between tank and PCM
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
The fuel level sensor B circuit is reading a voltage higher than the expected maximum threshold. This indicates either a wiring fault causing high voltage or a failed fuel level sensor sending unit.
The most common cause of P2068 (Fuel Level Sensor "B" Circuit High) is: Open circuit in fuel level sensor B wiring harness or connector
Typical repair costs for P2068 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains safe to drive but fuel gauge may read incorrectly, potentially causing driver to run out of fuel unexpectedly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2068 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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