What Does B1376 Mean?
This diagnostic trouble code indicates that the Body Control Module (BCM) has detected an abnormal voltage condition in the oil change reminder lamp circuit. Specifically, the circuit is showing a short to battery voltage (12V+), meaning the control wire is receiving constant power when it should be controlled by the BCM. This prevents the module from properly controlling the oil change indicator lamp and may cause it to illuminate continuously or behave erratically.
Common Causes
45%
Damaged or chafed wiring harness causing the oil change lamp control wire to contact a power source
30%
Failed instrument cluster with internal short circuit in the oil change lamp driver circuit
15%
Corroded or damaged connector terminals at the instrument cluster causing cross-circuit shorting
10%
Faulty Body Control Module with failed output driver for oil change lamp circuit
Diagnostic Steps
1
Step 1: Perform a visual inspection of the instrument cluster and surrounding wiring harness for obvious damage, chafing, melted insulation, or modifications. Look for signs of water intrusion, rodent damage, or previous repair attempts around the dash area.
2
Step 2: Using a digital multimeter, backprobe the oil change lamp control wire at the instrument cluster connector (with ignition off and connector still attached). Measure voltage to ground - you should see 0V when off and BCM-controlled voltage during normal operation. If you see constant battery voltage (12V+), disconnect the cluster and retest at the harness side.
3
Step 3: With the instrument cluster disconnected, measure resistance between the oil change lamp control wire and all power circuits (battery, ignition, accessory). Any reading below 10k ohms indicates a short circuit in the harness that must be traced and repaired.
4
Step 4: If harness tests show no short to power, inspect the instrument cluster connector for corrosion, bent pins, or moisture. Clean and repair as needed, then reconnect and retest. If the short persists with a known-good harness, the instrument cluster has an internal fault and requires replacement.
5
Step 5: Clear the diagnostic code and perform a functional test by cycling the ignition and operating the oil change reset procedure per manufacturer specifications. Verify the BCM can properly control the lamp and that battery voltage is not present on the control circuit during normal operation.
Estimated Repair Cost
$100 - $650
Parts + labor, varies by vehicle and location
This diagnostic trouble code indicates that the Body Control Module (BCM) has detected an abnormal voltage condition in the oil change reminder lamp circuit. Specifically, the circuit is showing a short to battery voltage (12V+), meaning the control wire is receiving constant power when it should be...
The most common cause of B1376 (Oil Change Lamp Circuit Short To Battery) is: Damaged or chafed wiring harness causing the oil change lamp control wire to contact a power source
Typical repair costs for B1376 range from $100 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This code poses no immediate safety risk and the vehicle is safe to drive. The primary concern is loss of the oil change reminder function, which could lead to missed maintenance if not tracked separately. Repair can be scheduled at convenience but should not be ignored long-term to prevent maintenance oversight.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1376 to identify the root cause.
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Quick Info
Category
Body
System
Body Control / Instrument Cluster
Difficulty
Type
Manufacturer
Recommended Tools
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