b1971 inadvertent power fault
B1971 Inadvertent Power Fault
OBD2 Code: B1971
Description: Inadvertent Power Fault
Definition: The B1971 code indicates a fault in the vehicle’s electrical system where there is an unintended power supply to a component or circuit. This can be due to wiring issues, faulty relays, or other electrical malfunctions that cause power to be delivered when it should not be.
b1971 – Inadvertent Power Fault
Typical Severity: Moderate
Common Causes
b1971 – Inadvertent Power Fault
Common causes:
- Faulty ignition switch
- Short circuit in the wiring harness
- Loose or corroded electrical connections
Common Misdiagnosis
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OBD2 Code: B1971
Description: Inadvertent Power Fault
Common Misdiagnosis: The issue is often misdiagnosed as a faulty battery or alternator problem, when it may actually be related to wiring issues or a malfunctioning power control module.
Common Diagnostic Steps
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OBD2 Code: B1971
Description: Inadvertent Power Fault
- Check the vehicle’s battery voltage to ensure it is within the specified range.
- Inspect all related fuses and relays for any signs of damage or corrosion.
- Examine wiring and connectors associated with the power distribution system for any loose connections, fraying, or breaks.
- Test the ignition switch for proper operation and continuity.
- Use a scan tool to clear the code and perform a road test to see if the code returns.
- If equipped, check for Technical Service Bulletins (TSBs) that may apply to this specific fault code.