The P2066: Fuel Level Sensor ‘B’ Circuit Performance refers to an issue where the fuel level sensor ‘B’ is not performing as expected. This sensor measures the fuel level in the tank and provides this data to the vehicle’s control module. A performance issue can lead to inaccurate fuel level readings, which could result from a faulty sensor, wiring issues, or connector problems.
P2066 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2066: Fuel Level Sensor ‘B’ Circuit Performance |
| Is it serious? | No, but it can lead to inaccurate fuel readings, potentially leaving the driver unaware of the actual fuel level. |
| Possible causes | – Incorrect sensor performance – Faulty sensor – Wiring or connector issues |
| How to diagnose? | – Test the sensor for performance – Inspect wiring and connectors – Verify sensor operation |
P2066 Meaning
The P2066 code indicates that the performance of fuel level sensor ‘B’ is not within the expected range. This sensor is responsible for monitoring the fuel level in the tank. When it is underperforming, it may provide inaccurate fuel level data to the vehicle’s control system, which can cause issues with fuel management and mislead the driver about the actual fuel level.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to search for any related codes that might provide additional details about the sensor performance issue. | OBD-II Scanner |
| Test the Sensor for Performance | Use a diagnostic tool or multimeter to test the performance of fuel level sensor ‘B’ and verify that it is accurately reporting the fuel level. | Multimeter, Diagnostic Tool |
| Inspect Wiring and Connectors | Check the wiring and connectors connected to the sensor for signs of corrosion, damage, or disconnections that may be causing performance issues. | Flashlight, Multimeter |
| Verify Sensor Operation | Confirm that the sensor is functioning as per the manufacturer’s specifications, and ensure that no mechanical obstructions are affecting the readings. | Diagnostic Tool |
| Clear the Code and Test Drive | After completing repairs, clear the fault code with an OBD-II scanner and take the vehicle for a test drive to confirm the issue is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Re-scan the vehicle after the test drive to verify that the P2066 code does not return. If it reappears, further diagnostics may be necessary. | OBD-II Scanner |
Free PDF: How to choose OBD2 scanner
I’ve made you a free PDF to choose the OBD2 scanner in 5 minutes.
✅ Which OBD2 scanner is best?
✅ Which type should you get (DIY, Pro, Hobby)
✅ What is the best scanner for the exact brand/feature (e.g best for BMW)
✅ How to get a Bi-Directional tool for as cheap as $40
✅ Discount coupons for scanners
PDF is 100% free and it is designed to help you pick a scanner in less than a few minutes! Not a boring 50-page guide.
Just tell me where to send it.
