What Does B1214 Mean?
B1214 indicates the Body Control Module (BCM) has detected an electrical fault in the running board lamp circuit. This code is set when the BCM detects an open circuit, short to ground, short to power, or excessive resistance in the wiring or lamp assembly for the running board courtesy lights. The BCM monitors current flow and voltage in this circuit and sets the code when parameters fall outside expected values.
Common Causes
35%
Burned out running board lamp bulb or failed LED module causing open circuit
30%
Damaged wiring harness or corroded connector at running board lamp due to moisture exposure and road debris
20%
Faulty running board lamp assembly with internal short or open circuit
10%
BCM internal circuit failure or poor ground connection at BCM
5%
Blown fuse or faulty relay in running board lamp power supply circuit
Diagnostic Steps
1
Step 1: Visually inspect the running board lamp assembly for physical damage, moisture intrusion, cracked lens, or obvious signs of burned/discolored bulbs or LEDs
2
Step 2: Check the running board lamp fuse in the fuse panel and test for battery voltage at the fuse output terminal using a multimeter (expected: 12-14V with ignition on)
3
Step 3: Disconnect the running board lamp connector and inspect for corrosion, bent pins, or moisture. Test for voltage at the power supply wire (typically 12V) and continuity to ground on the ground wire (expected: less than 1 ohm resistance)
4
Step 4: With the lamp disconnected, measure resistance across the lamp assembly terminals using a multimeter (expected: 2-10 ohms for incandescent, higher for LED with internal resistor). Replace if open circuit (infinite resistance) or short circuit (near zero resistance)
5
Step 5: If wiring and lamp test good, inspect the wiring harness from lamp to BCM for chafing, cuts, or pinch points, particularly where harness enters body and near running board mounting points
6
Step 6: After repairs, clear the code using the diagnostic tool, cycle the lamp function multiple times, and verify the code does not return and lamp operates correctly
Estimated Repair Cost
$75 - $350
Parts + labor, varies by vehicle and location
B1214 indicates the Body Control Module (BCM) has detected an electrical fault in the running board lamp circuit. This code is set when the BCM detects an open circuit, short to ground, short to power, or excessive resistance in the wiring or lamp assembly for the running board courtesy lights. The ...
The most common cause of B1214 (Running Board Lamp Circuit Failure) is: Burned out running board lamp bulb or failed LED module causing open circuit
Typical repair costs for B1214 range from $75 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This is a non-critical fault that only affects convenience lighting and does not impact vehicle safety or drivability. The vehicle is safe to drive, but running board illumination will be inoperative, which may create a minor safety concern when entering/exiting the vehicle in dark conditions.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1214 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Body
System
Body Electrical and Lighting System
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
