B1387
Oil Temperature Sensor Circuit Open
B1387 is an OBD-II diagnostic trouble code meaning: Oil Temperature Sensor Circuit Open. Common causes: broken wires to the oil temperature sensor, malfunction of the oil temperature sensor itself. Estimated repair cost: $22–89.
Symptoms
- Incorrect oil temperature readings on the dashboard
- Check engine light comes on
- Deterioration of vehicle dynamics
- Increased fuel consumption
Causes
- Broken wires to the oil temperature sensor
- Malfunction of the oil temperature sensor itself
- Poor contact in the sensor connector
- Damage to the wiring harness in the engine compartment
- Problems with the engine ECU
How to Fix
- Check the integrity of the wires to the sensor
- Check the sensor connector for oxidation
- Measure the sensor resistance (compare with standards)
- Check for power supply to the sensor
- If necessary, replace the oil temperature sensor
- Check wiring harness for damage
Related codes
FAQ
What does the B1387 code mean?
B1387 is an OBD-II diagnostic trouble code that indicates: Oil Temperature Sensor Circuit Open
What causes a B1387 error code?
The most common causes of B1387 include: Broken wires to the oil temperature sensor; Malfunction of the oil temperature sensor itself; Poor contact in the sensor connector; Damage to the wiring harness in the engine compartment.
How do I fix a B1387 diagnostic trouble code?
To fix B1387: Check the integrity of the wires to the sensor. Check the sensor connector for oxidation. Measure the sensor resistance (compare with standards). For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1387?
Limited driving only, diagnose soon
How much does it cost to fix B1387?
The estimated repair cost for B1387 is $22–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat