OBD Guide
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B1388

Oil Temperature Sensor Circuit Short To Battery

B1388 is an OBD-II diagnostic trouble code meaning: Oil Temperature Sensor Circuit Short To Battery. Common causes: damage to the oil temperature sensor wiring harness, short circuit in the sensor circuit. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Incorrect oil temperature readings on the dashboard
  • Check engine light comes on
  • Reduced engine power
  • ECU transition to emergency mode

Causes

  • Damage to the oil temperature sensor wiring harness
  • Short circuit in the sensor circuit
  • Oil temperature sensor malfunction
  • Problems with the power circuit

How to Fix

  1. Check the integrity of the oil temperature sensor wiring harness
  2. Check the resistance and voltage at the sensor
  3. Replace the oil temperature sensor if necessary
  4. Eliminate short circuit in the circuit

Related codes

P0115P0117P0118

FAQ

What does the B1388 code mean?

B1388 is an OBD-II diagnostic trouble code that indicates: Oil Temperature Sensor Circuit Short To Battery

What causes a B1388 error code?

The most common causes of B1388 include: Damage to the oil temperature sensor wiring harness; Short circuit in the sensor circuit; Oil temperature sensor malfunction; Problems with the power circuit.

How do I fix a B1388 diagnostic trouble code?

To fix B1388: Check the integrity of the oil temperature sensor wiring harness. Check the resistance and voltage at the sensor. Replace the oil temperature sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1388?

Limited driving only, diagnose soon

How much does it cost to fix B1388?

The estimated repair cost for B1388 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat