How to Fix B1391 Oil Level Switch Circuit Failure

Introduction

If you’re experiencing the B1391 Oil Level Switch Circuit Failure error code, don’t panic. This is a common issue that can be easily fixed with a few simple steps. In this article, we’ll guide you through the process of fixing this error code and getting your car back on the road.

What is B1391 Oil Level Switch Circuit Failure?

B1391 is an error code that indicates a problem with the oil level switch circuit. This switch is responsible for monitoring the oil level in your car’s engine and sending a signal to the engine control module (ECM) if the oil level is too low. When the ECM receives this signal, it will trigger the B1391 error code.

Step-by-Step Guide to Fixing B1391 Oil Level Switch Circuit Failure

Step 1: Check the Oil Level

The first step in fixing the B1391 error code is to check the oil level in your car’s engine. Make sure the engine is cool and parked on a level surface before checking the oil level. Locate the dipstick, pull it out, and wipe it clean with a rag. Reinsert the dipstick and pull it out again to check the oil level. If the oil level is low, add more oil until it reaches the recommended level.

Step 2: Inspect the Oil Level Switch

If the oil level is not the issue, the next step is to inspect the oil level switch. The switch is located on the side of the engine block and is connected to the ECM by a wiring harness. Check the wiring harness for any signs of damage or corrosion. If the wiring harness is damaged, replace it. If the wiring harness is in good condition, remove the oil level switch and inspect it for any signs of damage or wear. If the switch is damaged, replace it.

Step 3: Test the Oil Level Switch

If the oil level switch appears to be in good condition, the next step is to test it. Use a multimeter to test the switch’s resistance. The resistance should be within the manufacturer’s specifications. If the resistance is outside of the specifications, replace the switch.

Step 4: Clear the Error Code

Once you’ve fixed the issue with the oil level switch, it’s time to clear the error code. Use an OBD-II scanner to clear the code from the ECM’s memory. If the error code returns, there may be an underlying issue with the ECM or another component in the engine.

Useful Tips

– Regularly check your car’s oil level to prevent the B1391 error code from occurring.
– If you’re not comfortable working on your car’s engine, take it to a professional mechanic for repairs.
– Always use the recommended type and grade of oil for your car’s engine.

Conclusion

Fixing the B1391 Oil Level Switch Circuit Failure error code is a straightforward process that can be done with a few simple steps. By following the steps outlined in this article, you can get your car back on the road and running smoothly.

FAQs

1. Can I still drive my car if the B1391 error code is present?

It’s not recommended to drive your car with the B1391 error code present. This code indicates a problem with the oil level switch circuit, which can lead to engine damage if not addressed.

2. How often should I check my car’s oil level?

It’s recommended to check your car’s oil level at least once a month or before any long trips.

3. Can I fix the B1391 error code myself?

If you’re comfortable working on your car’s engine and have the necessary tools, you can fix the B1391 error code yourself. However, if you’re not experienced with engine repairs, it’s best to take your car to a professional mechanic.