What Does B1375 Mean?
This code indicates the Body Control Module (BCM) has detected an open circuit in the oil change reminder lamp circuit. The BCM monitors the oil change indicator light on the instrument cluster and has detected a break in the electrical pathway, preventing the lamp from illuminating when commanded. This is a manufacturer-specific body code related to the maintenance reminder system, not actual oil quality or pressure monitoring.
Common Causes
40%
Burned out or failed oil change reminder lamp bulb in the instrument cluster
30%
Open circuit or broken wire between BCM and instrument cluster oil change lamp circuit
20%
Faulty instrument cluster circuit board or internal connection failure
10%
Corroded or loose connector at BCM or instrument cluster
Diagnostic Steps
1
Step 1: Visually inspect the instrument cluster for any burnt out lamps or indicators. Check if the oil change lamp illuminates during key-on self-test or bulb check sequence.
2
Step 2: Using a multimeter, check for voltage at the oil change lamp circuit at the instrument cluster connector with ignition on and BCM commanding lamp on (may require bi-directional scan tool control). Expected reading: battery voltage (12-14V) when commanded on, 0V when off.
3
Step 3: If voltage is present at cluster connector, remove instrument cluster and inspect lamp bulb and circuit board for burnt bulb, cold solder joints, or damaged traces. Replace bulb or repair cluster as needed.
4
Step 4: If no voltage at cluster connector, backprobe the BCM oil change lamp output circuit. Check for continuity between BCM output pin and instrument cluster input pin with ignition off. Expected reading: less than 5 ohms resistance indicates good circuit, infinite resistance indicates open wire.
5
Step 5: Inspect all connectors and wiring between BCM and instrument cluster for damage, corrosion, pushed-back pins, or breaks in the wire harness. Pay special attention to flex points and connector terminals.
6
Step 6: Clear codes and verify repair by commanding the oil change lamp on with bi-directional controls or performing an oil change reset procedure to confirm lamp operation and verify code does not return.
Estimated Repair Cost
$75 - $450
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected an open circuit in the oil change reminder lamp circuit. The BCM monitors the oil change indicator light on the instrument cluster and has detected a break in the electrical pathway, preventing the lamp from illuminating when commanded. ...
The most common cause of B1375 (Oil Change Lamp Circuit Open) is: Burned out or failed oil change reminder lamp bulb in the instrument cluster
Typical repair costs for B1375 range from $75 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This code does not affect vehicle safety or drivability and poses no immediate risk. The only concern is the driver may not receive visual notification when an oil change is due, so monitoring oil change intervals manually is recommended until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1375 to identify the root cause.
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Quick Info
Category
Body
System
Body Control/Instrument Cluster
Difficulty
Type
Manufacturer
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