What Does B2245 Mean?
DTC B2245 indicates the Body Control Module (BCM) has detected an open circuit condition in the passenger rear door ajar switch circuit. This means the BCM is not receiving a proper signal from the door ajar sensor, typically due to a broken wire, faulty switch, or poor connection. The system is unable to determine whether the passenger rear door is open or closed, which may cause interior lights to malfunction, chimes to sound incorrectly, or security system issues.
Common Causes
45%
Faulty or misaligned passenger rear door ajar switch/sensor
30%
Open circuit or broken wire in door ajar switch wiring harness
15%
Corroded or loose electrical connector at door ajar switch or BCM
10%
Failed Body Control Module (BCM) input circuit
Diagnostic Steps
1
Step 1: Visually inspect the passenger rear door ajar switch located in the door latch assembly for physical damage, misalignment, or debris preventing proper operation. Manually actuate the switch and observe if it returns to proper position.
2
Step 2: Using a digital multimeter, check for continuity across the door ajar switch terminals with the door open and closed. Expected readings: circuit closed (near 0 ohms) when door is open, open circuit (infinite resistance) when door is closed, or vice versa depending on switch design.
3
Step 3: Inspect the wiring harness from the door ajar switch through the door jamb boot to the BCM connector for breaks, chafing, or pinched wires. Flex the harness while monitoring continuity to identify intermittent opens.
4
Step 4: Check voltage supply and ground at the door ajar switch connector with BCM connected. Expected readings: battery voltage or 5V reference on supply wire and solid ground on return circuit (specifications vary by manufacturer).
5
Step 5: If all wiring and switch test good, access BCM connector and check terminal pin condition for corrosion or backing out. Verify continuity from door ajar switch connector to BCM terminal pin.
6
Step 6: After repair, clear codes, cycle the passenger rear door open and closed multiple times, and verify the door ajar indicator functions properly on the instrument cluster and that the code does not return.
Estimated Repair Cost
$75 - $350
Parts + labor, varies by vehicle and location
DTC B2245 indicates the Body Control Module (BCM) has detected an open circuit condition in the passenger rear door ajar switch circuit. This means the BCM is not receiving a proper signal from the door ajar sensor, typically due to a broken wire, faulty switch, or poor connection. The system is una...
The most common cause of B2245 (Passenger Rear Door Ajar Circuit Open) is: Faulty or misaligned passenger rear door ajar switch/sensor
Typical repair costs for B2245 range from $75 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This code does not affect vehicle drivability or safety and the vehicle is safe to drive. The main concerns are cosmetic (interior lights staying on draining the battery, incorrect dashboard warnings, or security system malfunctions), so repair can be scheduled at convenience but should not be ignored long-term to prevent battery drain.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2245 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Door Systems
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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