P155B Buick Code - Cruise Control Set/Coast Switch 2 Circuit
Quick Answer
The Cruise Control Switch is an input to the Body Control Module (BCM). Common causes include Faulty Cruise Control Switch, Cruise Control Switch harness is open or shorted, Cruise Control 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
- P155B Buick indicates Cruise Control Set/Coast Switch 2 Circuit.
- Common causes
- Common causes include Faulty Cruise Control Switch, Cruise Control Switch harness is open or shorted, Cruise Control 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 P155B Buick Description
What are the Possible Causes of the DTC P155B Buick?
- Faulty Cruise Control Switch
- Cruise Control Switch harness is open or shorted
- Cruise Control Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC P155B Buick?
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 P155B Buick 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 P155B Buick Code
What does the OBDII code P155B for Buick mean?
The code P155B indicates a problem with the Cruise Control Set/Coast Switch 2 Circuit, which may affect the functionality of your cruise control system.
What are the common symptoms of code P155B in a Buick?
Symptoms may include the cruise control not engaging, intermittent operation, or the inability to set or maintain a desired speed.
What causes the P155B code on a Buick?
Common causes include a faulty cruise control switch, damaged wiring or connectors in the circuit, or issues with the vehicle’s electronic control module (ECM).
Can I drive my Buick with the P155B code?
While the vehicle may still be drivable, the cruise control system may not function properly, which could be inconvenient during long trips.
How do I diagnose the P155B code on my Buick?
Start by inspecting the cruise control switch and related wiring for damage. Use a multimeter to test the circuit for continuity and verify the switch operation.
How can the P155B code be fixed in a Buick?
Repairs may involve replacing the cruise control switch, fixing damaged wiring or connectors, or updating/reprogramming the ECM if necessary.
Is the P155B code specific to Buick vehicles?
While the code is often associated with Buick models, it can appear in other GM vehicles that use similar cruise control systems.
How much does it cost to fix the P155B code in a Buick?
Repair costs vary, but replacing the cruise control switch typically costs $100-$200, while wiring repairs may cost more depending on the extent of the damage.
Will clearing the P155B code solve the problem permanently?
Clearing the code may temporarily remove it, but if the underlying issue isn’t fixed, the code will likely return.
Can a bad ECM cause the P155B code?
Yes, although rare, a malfunctioning ECM can cause issues with the cruise control circuit and trigger the P155B code.
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