What Does B1554 Mean?
This code indicates that the Body Control Module (BCM) has detected an abnormal short to ground condition in the decklid (trunk) release circuit. The BCM monitors the electrical circuit that controls the trunk release solenoid/actuator and has identified that current is flowing to ground through an unintended path, causing excessive current draw. This prevents proper operation of the trunk release mechanism and protects the circuit from damage by disabling the function.
Common Causes
45%
Damaged or chafed wiring harness causing the trunk release circuit wire to contact vehicle ground
30%
Failed trunk release solenoid/actuator with internal short to ground
15%
Water intrusion or corrosion in trunk release switch or connector causing short circuit
10%
Faulty Body Control Module with internal short in output driver circuit
Diagnostic Steps
1
Step 1: Perform visual inspection of the trunk release wiring harness, particularly in flex areas near trunk hinges and along body seams, looking for damaged insulation, pinched wires, or signs of chafing against metal surfaces
2
Step 2: Disconnect the trunk release solenoid/actuator connector and measure resistance from the control wire terminal to vehicle ground using a digital multimeter; reading should be greater than 10k ohms (open circuit), any low resistance indicates wiring short
3
Step 3: With solenoid disconnected, measure resistance of the solenoid itself between its terminals; typical readings should be 3-8 ohms, and measure from each terminal to solenoid housing for shorts to ground (should read infinite resistance)
4
Step 4: Inspect all connectors in the trunk release circuit for water intrusion, corrosion, or bent pins causing shorts; disconnect BCM connector and inspect for damage or moisture in the trunk release control pin cavity
5
Step 5: If all wiring and components test good, perform BCM output test using bi-directional controls while monitoring current draw; normal operation should show 1-3 amps momentarily, excessive current indicates BCM internal failure
6
Step 6: After repair, clear codes and cycle trunk release function multiple times to verify proper operation and confirm code does not return
Estimated Repair Cost
$100 - $450
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) has detected an abnormal short to ground condition in the decklid (trunk) release circuit. The BCM monitors the electrical circuit that controls the trunk release solenoid/actuator and has identified that current is flowing to ground through an ...
The most common cause of B1554 (Decklid Release Circuit Short To Ground) is: Damaged or chafed wiring harness causing the trunk release circuit wire to contact vehicle ground
Typical repair costs for B1554 range from $100 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this only affects trunk release convenience function. The main concern is inability to open the trunk using the release button, though manual key operation typically remains functional. Non-urgent repair unless trunk access is required.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1554 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Convenience Systems
Difficulty
Type
Manufacturer
Recommended Tools
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