B1971 Code - Inadvertent Power Fault
Quick Answer
If interior lights are accidentally left on, a Delayed Interior Lighting (DIL) feature provides automatic shutoff. Common causes include Faulty Inadvertent Power Relay, Inadvertent Power Relay harness is open or shorted, Inadvertent Power 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
- B1971 indicates Inadvertent Power Fault.
- Common causes
- Common causes include Faulty Inadvertent Power Relay, Inadvertent Power Relay harness is open or shorted, Inadvertent Power 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 B1971 Description
- A door is opened or closed, or driver door unlock message is received.
- The trunk is opened or closed.
- Interior lights are turned on. When DIL relay is energized, power is supplied to interior lights and high side of the interior light relay coil.
The BCM continuously monitors output to DIL relay. The Diagnostic Trouble Code (DTC) B1971 will set when output is commanded on or off, and short or open is detected for at least 2 seconds. When DTC B1971 is set, BCM will continue to command the requested state of relay until it is achieved or no longer necessary. DTC B1971 will clear when conditions for fault no longer exist or when scan tool is used. A history DTC will clear after 50 consecutive ignition cycles if conditions for fault no longer exist.
What are the Possible Causes of the DTC B1971?
- Faulty Inadvertent Power Relay
- Inadvertent Power Relay harness is open or shorted
- Inadvertent Power Relay circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B1971?
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 B1971 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 Makes
- B1971 Buick — Inadvertent Power Fault
- B1971 Cadillac — Inadvertent Power Fault
- B1971 Chevrolet — Inadvertent Power Fault
- B1971 Chrysler — Power Liftgate Latch Cinch Ratchet Primary Switch Performance
- B1971 Dodge — Power Liftgate Latch Cinch Ratchet Primary Switch Performance
- B1971 GMC — Inadvertent Power Fault
- B1971 Jeep — Power Liftgate Latch Cinch Ratchet Primary Switch Performance
- B1971 Pontiac — Inadvertent Power Fault
- B1971 RAM — Power Liftgate Latch Cinch Ratchet Primary Switch Performance
- B1971 Saturn — Inadvertent Power Fault
Frequently Asked Questions about B1971 Code
1. What are the common symptoms of OBDII code B1971 (Inadvertent Power Fault)?
The common symptoms of B1971 include intermittent or complete loss of power to certain vehicle components like the radio, power windows, or interior lights.
2. What could cause the OBDII code B1971 (Inadvertent Power Fault) to trigger?
Possible causes of B1971 include a faulty body control module (BCM), damaged wiring or connectors, or a short circuit in the power supply system.
3. How can I diagnose the Inadvertent Power Fault (B1971) in my vehicle?
To diagnose B1971, you can start by checking the fuses related to the affected components, inspecting wiring for any visible damage, and using a multimeter to test for continuity and voltage at various points.
4. Can a DIY enthusiast repair the Inadvertent Power Fault (B1971) issue?
Repairing B1971 may require advanced electrical knowledge and diagnostic tools. DIY enthusiasts with experience in automotive electrical systems may be able to troubleshoot and repair the issue themselves.
5. Is it safe to continue driving with the OBDII code B1971 (Inadvertent Power Fault) present?
It is generally not recommended to drive with B1971 present, as it can lead to unexpected power failures while operating the vehicle, potentially compromising safety and convenience.
6. Will resetting the OBDII code B1971 (Inadvertent Power Fault) make the issue go away?
Resetting the code may temporarily clear the fault, but if the underlying issue causing B1971 is not addressed, the code is likely to reappear once the problem resurfaces.
7. How much does it typically cost to repair the Inadvertent Power Fault (B1971)?
The cost of repairing B1971 can vary depending on the specific cause of the issue, the labor rates in your area, and whether you choose to address the problem yourself or take your vehicle to a professional mechanic.
8. Can extreme weather conditions contribute to triggering the OBDII code B1971 (Inadvertent Power Fault)?
Extreme weather conditions, especially moisture or humidity, can potentially exacerbate electrical issues in a vehicle, including those related to B1971. Proper insulation and weatherproofing can help prevent such problems.
9. Are there any preventive measures to avoid encountering the Inadvertent Power Fault (B1971)?
Regularly inspecting and maintaining the electrical components in your vehicle, ensuring proper wiring connections, and promptly addressing any signs of power issues can help prevent the occurrence of B1971.
10. Is there a specific model or make of vehicles more prone to experiencing the OBDII code B1971 (Inadvertent Power Fault)?
While B1971 can occur in various vehicle models, certain makes or models known for electrical system issues may be more prone to experiencing this fault. Conducting research on common electrical problems in your specific vehicle can provide insights.
Discuss the causes and fixes for B1971 OBDII Code
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