Emissions Archives - Page 4 of 47 - UnderhoodService
VIDEO: Motor Mounts And EVAP Codes

Andrew Markel shows how an EVAP code and a catalyst efficiency code are both related to weak motor mounts. Sponsored by Auto Value and Bumper to Bumper.

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VIDEO: Thimbal And Planar Oxygen Sensors

Andrew Markel goes over the composition of two types of oxygen sensors with a brief history into each. Sponsored by Bosch Automotive Service Solutions.

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VIDEO: Nissan Maxima Mass Air Flow Sensor Codes

Andrew Markel explains how a mass air flow code and an oxygen sensor code on a Nissan Maxima can be solved with one simple check. Sponsored by Nissan.

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VIDEO: Lean Codes On EGR Valves

Andrew Markel discusses a diagnostic solution when a vacuum leak appears that can’t be pinned down. Sponsored by Auto Value and Bumper to Bumper.

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GMC Tech Tip: EVAP Vent Solenoid Replacement (P0449)

Check engine light is illuminated with code P0449 from scan tool (Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction).

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VIDEO: Carbon Or Charcoal Activated Cabin Air Filters

Andrew Markel explains how carbon- or charcoal-activated cabin air filters are better for the health of your customers. Sponsored by MAHLE.

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VIDEO: Slow Or Lazy Oxygen Sensor Maintenance

Andrew Markel explains how coolant leaks and oil consumption can lead to a slow, lazy or dead oxygen sensor. Sponsored by Robert Bosch.

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KIA: Codes P0171, P0446, P0507 And P2187

This Kia Rio had the check engine light on with codes P0171, P0446, P0507 and P2187. Follow this Real Fix to see the diagnostic steps used to determine the actual fault.

VIDEO: Gasoline Direct Injection (GDI) Carbon Deposits And The Synthetic Oil Connection

Conventional oil that has high volatility will cause more vapors and make carbon deposits worse. Synthetic oil with low volatility can reduce vapors and prevent carbon from forming on the valves. Sponsored by Auto Value and Bumper to Bumper.

VIDEO: Diesel Exhaust Fluid Winter Tip

Andrew Markel shares a quick tip about diesel exhaust fluid and why the level sensor may show as low in the winter, even when it is topped off.

Electronically Controlled Thermostats: A New Take On Wax And Brass

An electronic thermostat can preemptively control the temperature the same way the fuel injection system can control the stoichiometric ratio in the combustion chamber by changing the pulse width of the fuel injector. By being able to control the temperature of the coolant, the engine management system can optimize engine performance so leaner combustion events can take place and cold start periods are minimized.

Saturn Tech Tip: Vehicle Fails Emissions Tests

State emissions tests need to be done, but when a vehicle does not pass the test the first time, where do you look? This Real Fix provides multiple diagnostic procedures that could lead you to the fault. Kiss that ugly engine coolant temperature sensor wiring harness damage goodbye and ensure that the Saturn passes the emissions test with flying colors.

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