Electrical System Fault Analysis Cases
Complete database of electrical system problems including battery issues, charging system failures, lighting problems, and sensor diagnostics.
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Intermittent A/C Issue in 2007 Volvo S40
2007 Volvo S40
The owner reports that the A/C in their 2007 Volvo S40 works intermittently, stopping unexpectedly. They have performed all basic A/C services, indica...
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1996 Ford Taurus Engine Light After Cam Sensor Replacement
1996 Ford Taurus
The owner reports that the check engine light illuminated after replacing both cam sensors on their 1996 Ford Taurus. Despite the replacement, the tro...
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2007 Toyota Camry Knock Sensor Issue Analysis
2007 Toyota Camry
The owner of a 2007 Toyota Camry with 140,000 miles reports that the check engine light is illuminated with a knock sensor code. After resetting the c...
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1996 Acura RL Cruise Control Diagnostic Analysis
1996 Acura RL
The owner reports that the cruise control system on their 1996 Acura RL is inoperative. The issue manifests itself when attempting to engage the cruis...
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TPMS Light Stays On After Tire Rotation
2008 Kia Optima
The vehicle owner reports that after rotating the tires on their 2008 Kia Optima, the TPMS (Tire Pressure Monitoring System) light remains illuminated...
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2005 Chevy Equinox Fuse Keeps Blowing, No Start Issue
2005 Chevrolet Equinox
The owner of a 2005 Chevy Equinox reports recurring issues with a blown fuse that controls the backup lights. Each time they attempt to start the vehi...
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2001 Kia Rio P0172 Error Code Diagnosis
2001 Kia Rio
The owner reports a 2001 Kia Rio LS TOP experiencing a check engine light with error code P0172, indicating a rich fuel condition. Recent repairs incl...
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2008 Pontiac Wave Front Headlight Wiring Issue
2008 Pontiac Wave
The owner reports that the front headlights of their 2008 Pontiac Wave are malfunctioning. The dealership advised that the wiring harness needs replac...
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Service Engine Light On - BMW 525i Diagnostics
2006 BMW 525i
The owner of a 2006 BMW 525i reports that the service engine light has illuminated after recently having the vehicle serviced. Additionally, the outsi...
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2008 Saturn Astra AC Compressor Diagnosis
2008 Saturn Astra
The AC compressor in my 2008 Saturn Astra failed in June 2013. I bought an AC Delco compressor and receiver/drier from Rock Auto, which my usual mecha...
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1999 Honda Accord Speed Sensor Diagnostic Analysis
1999 Honda Accord
The owner of a 1999 Honda Accord with a F18B SOHC VTEC engine is experiencing speed sensor issues. Symptoms include erratic speedometer readings and p...
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ECU Diagnosis for Toyota 4Runner with DTC Code 11
unknown Toyota 4Runner
The technician is facing an issue with a Toyota 4Runner SR5 that does not reach a negative signal on the injectors, preventing the vehicle from starti...
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2002 Buick Regal Instrument Cluster Malfunction
2002 Buick Regal
The owner reports that the odometer, PRND indicator, and trip meter are completely dark. This issue began as an intermittent blackout and has since be...
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2006 Mitsubishi Galant P0421 Diagnostic Analysis
2006 Mitsubishi Galant
The owner reports a persistent check engine light on their 2006 Mitsubishi Galant after replacing the catalytic converter. They suspect that an oxygen...
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2006 Pontiac Grand Prix Trunk Won't Open Diagnosis
2006 Pontiac Grand Prix
The owner of a 2006 Pontiac Grand Prix reports that the trunk won't open. This issue occurs intermittently and seems to have started after some previo...
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2007 Chevy Trailblazer Interior Electrical Issue
2007 Chevrolet Trailblazer
The owner reports intermittent electrical issues with their 2007 Chevy Trailblazer. Specifically, the interior lights flicker and sometimes turn off c...
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1999 GMC Sonoma Fuel Gauge Level Misreading
1999 GMC Sonoma
The owner reports that after replacing the fuel pump and sending unit, the fuel gauge still reads incorrectly. Initially, when the ignition is turned ...
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2008 Ford F350 Fuse Panel Issue with VPWR
2008 Ford F350
The owner of a 2008 Ford F350 reports that a 20-amp fuse under the hood blows immediately when the ignition is turned on. They are unsure where to sta...
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