What Does B1332 Mean?
This code indicates the Body Control Module (BCM) has detected an open circuit in the decklid or rear door ajar switch monitoring circuit. The BCM continuously monitors switch states to determine if the trunk/decklid or rear door is properly closed. An open circuit means the BCM is not receiving a proper signal from the position switch, either because the circuit is physically broken, disconnected, or the switch itself has failed.
Common Causes
35%
Faulty or misaligned decklid/rear door ajar switch causing intermittent or no contact
30%
Broken, corroded, or disconnected wiring between the BCM and the ajar switch
20%
Corroded or loose electrical connector at the switch or BCM
15%
Failed Body Control Module unable to properly monitor the circuit
Diagnostic Steps
1
Step 1: Perform a visual inspection of the decklid/rear door ajar switch and its mounting. Check for physical damage, misalignment, or debris preventing proper switch actuation. Manually operate the switch while observing scan tool live data for state changes.
2
Step 2: Inspect all wiring and connectors from the ajar switch to the BCM. Look for pinched wires, corrosion, water intrusion, or disconnected terminals. Pay special attention to areas where wiring passes through rubber boots or hinges.
3
Step 3: Using a digital multimeter, test continuity of the circuit from the switch connector to the BCM connector with the switch disconnected. Expected reading should be less than 5 ohms for a good circuit. Also check for short to ground (should read infinite resistance).
4
Step 4: Test the ajar switch itself by disconnecting it and measuring resistance across its terminals while manually actuating the switch. Compare readings to manufacturer specifications (typically closed circuit when door/decklid is open, open circuit when closed).
5
Step 5: If all wiring and switch tests pass, inspect BCM connector for corrosion or pushed-back pins. Verify proper BCM ground connections with multimeter (should be less than 0.5 ohms to chassis ground).
6
Step 6: Clear the code, operate the decklid/rear door multiple times, and recheck for code return. Monitor live data during operation to confirm proper signal response.
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 decklid or rear door ajar switch monitoring circuit. The BCM continuously monitors switch states to determine if the trunk/decklid or rear door is properly closed. An open circuit means the BCM is not receiving a p...
The most common cause of B1332 (Decklid Ajar Rear Door Circuit Open) is: Faulty or misaligned decklid/rear door ajar switch causing intermittent or no contact
Typical repair costs for B1332 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. The vehicle is safe to drive, though you may experience incorrect door ajar warnings, interior lights staying on, or inability to remotely lock the vehicle until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1332 to identify the root cause.
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Quick Info
Category
Body
System
Body Control System
Difficulty
Type
Manufacturer
Recommended Tools
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