What Does B1384 Mean?
This diagnostic trouble code indicates that the Body Control Module (BCM) or instrument cluster has detected an electrical fault in the oil level warning lamp circuit. The system monitors the circuit that controls the oil level indicator light on the dashboard and has identified an open circuit, short circuit, or excessive resistance preventing proper lamp operation. This code specifically addresses the warning lamp circuit itself, not the oil level sensor or actual oil level condition.
Common Causes
35%
Failed oil level warning lamp bulb or LED in instrument cluster
30%
Damaged wiring or connector between BCM and instrument cluster oil lamp circuit
20%
Corroded or loose connector pins at instrument cluster or BCM
15%
Failed instrument cluster circuit board or BCM internal lamp driver circuit
Diagnostic Steps
1
Step 1: Perform a visual inspection of the instrument cluster, verify the oil level lamp is functioning by turning the ignition to ON position (engine off) - most vehicles illuminate all warning lamps during bulb check. Note if oil level lamp illuminates or remains dark.
2
Step 2: Access the instrument cluster connector and inspect for corrosion, bent pins, or loose connections. Check connector terminal tension and look for signs of water intrusion or heat damage.
3
Step 3: Using a digital multimeter, test for continuity and resistance in the oil level lamp circuit wiring between the BCM connector and instrument cluster connector. Expected resistance should be less than 5 ohms for good wiring. Check for short to ground (infinite resistance to ground expected).
4
Step 4: With ignition ON and connector unplugged at instrument cluster, command the BCM to activate the oil level lamp using bidirectional controls on the scan tool while measuring voltage at the lamp circuit terminal. Should see battery voltage when commanded ON, 0V when commanded OFF.
5
Step 5: If wiring and power supply are confirmed good but lamp still doesn't function, remove instrument cluster and inspect for burned bulb, damaged LED, or visible circuit board damage around the oil level lamp circuit area.
6
Step 6: After repairs, clear the code, perform BCM/cluster lamp self-test function via scan tool, cycle ignition multiple times, and verify code does not return and lamp functions properly during bulb check.
Estimated Repair Cost
$75 - $450
Parts + labor, varies by vehicle and location
This diagnostic trouble code indicates that the Body Control Module (BCM) or instrument cluster has detected an electrical fault in the oil level warning lamp circuit. The system monitors the circuit that controls the oil level indicator light on the dashboard and has identified an open circuit, sho...
The most common cause of B1384 (Oil Level Lamp Circuit Failure) is: Failed oil level warning lamp bulb or LED in instrument cluster
Typical repair costs for B1384 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 the vehicle can be driven normally. However, the oil level warning lamp may not function to alert you of low engine oil conditions, so manual oil level checks should be performed regularly until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1384 to identify the root cause.
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Quick Info
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Body
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Body Electrical System
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