B0120
Fluid Reservoir Level Sensor E
B0120 is an OBD-II diagnostic trouble code meaning: Fluid Reservoir Level Sensor E. Common causes: open or short circuit in the sensor circuit, sensor contamination. Estimated repair cost: $11–56.
Symptoms
- Check engine light is on
- False fluid level readings
- No low fluid warnings
Causes
- Open or short circuit in the sensor circuit
- Sensor contamination
- Mechanical damage to the float
- Tank failure
- Wiring Harness Problems
How to Fix
- Check the fluid level in the corresponding reservoir
- Visually inspect the sensor and circuit for damage
- Check sensor resistance
- Clean or replace sensor if necessary
- Check the integrity of the wiring harness
Related codes
Error B0120 by Vehicle Brand
FAQ
What does the B0120 code mean?
B0120 is an OBD-II diagnostic trouble code that indicates: Fluid Reservoir Level Sensor E
What causes a B0120 error code?
The most common causes of B0120 include: Open or short circuit in the sensor circuit; Sensor contamination; Mechanical damage to the float; Tank failure.
How do I fix a B0120 diagnostic trouble code?
To fix B0120: Check the fluid level in the corresponding reservoir. Visually inspect the sensor and circuit for damage. Check sensor resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B0120?
Limited driving only, diagnose soon
How much does it cost to fix B0120?
The estimated repair cost for B0120 is $11–56. Actual cost depends on your vehicle, location, and labor rates.
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