B3155 Cadillac Code - Passenger Door Lock Switch Circuit
Quick Answer
The Body Control Module (BCM) monitors the voltage level of the door lock and door unlock signal circuits. Common causes include Faulty Passenger Door Lock Switch, Passenger Door Lock Switch harness is open or shorted, Passenger Door Lock Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B3155 Cadillac indicates Passenger Door Lock Switch Circuit.
- Common causes
- Common causes include Faulty Passenger Door Lock Switch, Passenger Door Lock Switch harness is open or shorted, Passenger Door Lock Switch circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B3155 Cadillac Description
What are the Possible Causes of the DTC B3155 Cadillac?
- Faulty Passenger Door Lock Switch
- Passenger Door Lock Switch harness is open or shorted
- Passenger Door Lock Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3155 Cadillac?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B3155 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B3155 Cadillac Code
1. What does the OBDII code B3155 mean on a Cadillac?
B3155 indicates a fault in the passenger door lock switch circuit, which may prevent proper communication or operation of the door lock system.
2. What are the common symptoms of the B3155 code on a Cadillac?
Symptoms may include the passenger door lock not responding, intermittent or no operation of the lock switch, or an illuminated check engine or warning light.
3. What causes the B3155 code to appear?
Common causes include a faulty door lock switch, damaged wiring or connectors in the circuit, or a malfunctioning Body Control Module (BCM).
4. Can a bad passenger door lock switch cause the B3155 code?
Yes, a defective passenger door lock switch is a frequent cause of the B3155 code.
5. How can I troubleshoot the B3155 code on my Cadillac?
Start by inspecting the passenger door lock switch, checking for loose or damaged wiring, and testing the switch's functionality with a multimeter.
6. Can the B3155 code be fixed without replacing parts?
In some cases, the issue can be resolved by repairing damaged wiring, cleaning corroded connectors, or reseating loose connections.
7. Do I need to replace the Body Control Module (BCM) for a B3155 code?
Replacing the BCM is rarely needed and should only be considered after confirming that the switch and wiring are functioning correctly.
8. Is it safe to drive with the B3155 code on my Cadillac?
Yes, it’s generally safe to drive, but the passenger door lock may not function properly, which could pose a security or convenience issue.
9. How much does it cost to repair the B3155 code?
Repair costs vary, but replacing a door lock switch typically ranges from $50 to $150, while wiring repairs may cost $100 to $300 depending on labor.
10. Can I clear the B3155 code without fixing the issue?
Clearing the code with an OBDII scanner will temporarily remove it, but the code will return if the underlying issue is not resolved.
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