The Automotive Hour, Weekly Podcast of AGCO Automotive Corporation · Louis Altazan

2020-10-31.mp3

October 31, 2020·45 min·4 clips

Why your mechanic's scan tool might miss the real problem behind your car's flashing warning lights.

Lewis Alexander and Brian Terry host this call-in automotive advice show for AGCO Automotive Corporation. The episode focuses on diagnosing dashboard warning lights and other common vehicle issues. Jimmy calls about his 2008 Nissan Xterra, where the brake, ABS, VDC, and slip lights illuminate shortly after driving. The hosts explain these systems all rely on vehicle speed sensors, and a faulty sensor, corroded wiring, or a bad chassis control module could be the cause. They stress that a standard OBD2 code reader at a parts store cannot access the necessary chassis module codes for proper diagnosis. David describes an intermittent AC issue on his 2004 GMC Sierra, where cooling fades at idle accompanied by a hissing noise. Possible causes include low refrigerant, a dirty condenser, a faulty cooling fan, or an idle speed set too low, which would disengage the compressor. The hosts warn against simply adding refrigerant, as the system must be properly evacuated and measured to check for leaks, with charge ports being a common failure point. Amy reports her 2017 Toyota Corolla's RPMs surge to 5,000-6,000 when decelerating with cruise control, which the dealership claimed was normal. Alexander and Terry strongly dispute this, stating such a high RPM is excessive and indicates a malfunction, likely with the continuously variable transmission, and advise escalating the issue with Toyota. Jim details a long crank time on his 2002 Chevy Silverado V6 during cold starts. The diagnosis points to a failing check valve in the fuel pump, allowing fuel pressure to bleed down, or leaking fuel injectors. A simple test of cycling the ignition key before starting can help isolate the problem. Keith asks about dark transmission fluid in his 2011 Toyota Corolla, and the hosts differentiate between normal dark fluid and a burnt smell, which indicates internal damage. They recommend a pan drop and filter service for high-mileage vehicles and note that used transmissions are often a reliable repair for these models. Randy shares a similar experience with a long-cranking truck and confirms replacing the fuel pump solved it, noting an aftermarket check valve in the fuel line could be a cheaper temporary fix. The hosts detail the high cost of fuel pump replacement but emphasize it's necessary to avoid being stranded. A key insight is that warning light colors indicate urgency: red means stop immediately, while yellow or orange means address the issue soon. A flashing check engine light signals a critical misfire that can quickly destroy the catalytic converter by dumping raw fuel into it. The tire pressure monitoring system (TPMS) light can be triggered by both over-inflation and under-inflation, not just a low tire. Modern vehicles contain up to 70 different control modules, and a generic code reader may not access the specific module storing a fault code, as demonstrated by the first caller. The tone is friendly, conversational, and deeply educational, with the hosts explaining complex systems in accessible terms. They blend specific repair advice with broader diagnostic principles and automotive wisdom. This episode is ideal for DIY mechanics or any car owner seeking to understand dashboard warnings and avoid unnecessary repairs. Listeners who prefer highly produced narrative podcasts or non-technical content might find the straightforward, call-in format less engaging.

As heard by us

Dashboard warning lights become a practical question of code, symptom, and service.

This episode treats dashboard warning lights as a matter of reading the signs well as fixing the hardware. It keeps coming back to the same point: one code or symptom can point in more than one direction, so the real question is how much evidence a shop has before it calls…

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When your dash light is on and the meaning is anything but clear.

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