P155A GMC Code - Cruise Control Switch State Undetermined
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
- P155A GMC indicates Cruise Control Switch State Undetermined.
- 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 P155A GMC Description
What are the Possible Causes of the DTC P155A GMC?
- 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 P155A GMC?
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 P155A GMC 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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Information for Specific GMC Models
- P155A 2014 GMC Sierra — Cruise Control Switch State Undetermined
- P155A 2015 GMC Sierra — Cruise Control Switch State Undetermined
- P155A 2016 GMC Sierra — Cruise Control Switch State Undetermined
- P155A 2017 GMC Sierra — Cruise Control Switch State Undetermined
- P155A 2018 GMC Sierra — Cruise Control Switch State Undetermined
Frequently Asked Questions about P155A GMC Code
1. What are the common symptoms of OBDII code P155A GMC (Cruise Control Switch State Undetermined)?
- Common symptoms include non-functioning cruise control, illuminated check engine light, and potential issues with the vehicle's speed control system.
2. What are the possible causes of OBDII code P155A GMC?
- The code P155A can be triggered by a faulty cruise control switch, damaged wiring or connectors in the cruise control system, or issues with the vehicle's powertrain control module (PCM).
3. How can I diagnose the cause of OBDII code P155A GMC?
- Diagnosing the code P155A may involve checking the cruise control switch for proper operation, inspecting the wiring and connectors for damage, and using a diagnostic scan tool to communicate with the vehicle's PCM.
4. Can I still drive my vehicle with OBDII code P155A GMC active?
- While it is generally safe to drive with the code P155A, you may experience issues with the cruise control system. It is recommended to address the underlying cause of the code as soon as possible.
5. How can I repair OBDII code P155A GMC?
- Repairing the code P155A typically involves replacing a faulty cruise control switch, repairing damaged wiring or connectors, or reprogramming the vehicle's PCM as needed.
6. Is it possible to reset OBDII code P155A GMC without repairs?
- Resetting the code without addressing the underlying issue may temporarily turn off the check engine light, but the code is likely to return if the root cause is not resolved.
7. Can a DIY enthusiast fix OBDII code P155A GMC at home?
- Depending on the cause of the code, DIY enthusiasts with the necessary tools and knowledge may be able to diagnose and repair OBDII code P155A at home. However, complex issues may require professional assistance.
8. How much does it cost to repair OBDII code P155A GMC at a mechanic?
- The cost of repairing code P155A can vary depending on the underlying issue, the labor rates of the mechanic, and the cost of parts. It is recommended to obtain quotes from different mechanics for an accurate estimate.
9. Will OBDII code P155A GMC affect my vehicle's performance?
- While the code itself may not directly impact the vehicle's performance, unresolved issues with the cruise control system can affect convenience and functionality while driving.
10. Can OBDII code P155A GMC be a recurring problem?
- If the root cause of the code is not properly diagnosed and repaired, OBDII code P155A may recur intermittently, leading to ongoing issues with the cruise control system.
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