B2471 GMC Code - Interior Lights Fault
Quick Answer
Interior lights are commanded by Platform Zone Module (PZM) through an output to Courtesy Lights Relay. Common causes include Faulty Courtesy Lights Relay, Courtesy Lights Relay harness is open or shorted, Courtesy Lights Relay 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
- B2471 GMC indicates Interior Lights Fault.
- Common causes
- Common causes include Faulty Courtesy Lights Relay, Courtesy Lights Relay harness is open or shorted, Courtesy Lights Relay 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 B2471 GMC Description
A short to ground will be tested when inadvertent power is active, interior lights output is inactive, and the Diagnostic Trouble Code (DTC) B1971 is not set as current. A short to the battery will be tested when inadvertent power is active, interior lights output is active, and DTC B1971 is not set as current.
DTC B2471 will set when the commanded state of interior lights does not match the feedback state. When DTC B2471 is set, PZM will continue to command the state requested until IPC revokes request. DTC B2471 will clear when commanded state matches the feedback state.
What are the Possible Causes of the DTC B2471 GMC?
- Faulty Courtesy Lights Relay
- Courtesy Lights Relay harness is open or shorted
- Courtesy Lights Relay circuit poor electrical connection
- Faulty Platform Zone Module (PZM)
How to Fix the DTC B2471 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 B2471 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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Frequently Asked Questions about B2471 GMC Code
1. What are the common symptoms of OBDII code B2471 GMC (Interior Lights Fault)?
- The common symptoms include interior lights not turning on or flickering intermittently while driving.
2. What are the possible causes of OBDII code B2471 GMC (Interior Lights Fault)?
- The possible causes include a faulty interior light switch, damaged wiring, or a malfunctioning body control module.
3. How can I diagnose the issue related to OBDII code B2471 GMC (Interior Lights Fault)?
- You can start by checking the interior light switch for proper functionality and inspecting the wiring for any visible damage or loose connections.
4. Can a DIY enthusiast repair OBDII code B2471 GMC (Interior Lights Fault)?
- Yes, some DIY enthusiasts may be able to repair this issue by replacing the faulty interior light switch or repairing damaged wiring. However, it's recommended to consult a professional if unsure.
5. Is it safe to continue driving with OBDII code B2471 GMC (Interior Lights Fault)?
- While the issue may not directly affect the drivability of the vehicle, it's essential to address it promptly to ensure proper interior lighting for visibility and safety.
6. How much does it typically cost to repair OBDII code B2471 GMC (Interior Lights Fault)?
- The repair cost can vary depending on the specific cause of the issue, but it may range from $50 to $200 for parts and labor.
7. Can a malfunctioning body control module cause OBDII code B2471 GMC (Interior Lights Fault)?
- Yes, a malfunctioning body control module can potentially cause issues with the interior lights, triggering the B2471 fault code.
8. Are there any troubleshooting tips for OBDII code B2471 GMC (Interior Lights Fault)?
- You can try resetting the body control module by disconnecting the battery for a few minutes and then reconnecting it to see if it resolves the issue temporarily.
9. Will OBDII code B2471 GMC (Interior Lights Fault) affect other electrical systems in the vehicle?
- While the code specifically relates to interior lights, it's possible for electrical issues to cascade and impact other systems, so it's best to address it promptly.
10. How can I prevent OBDII code B2471 GMC (Interior Lights Fault) from occurring in the future?
- Regularly inspecting and maintaining the interior light system, including switches and wiring, can help prevent this fault code from reoccurring.
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