TechShop’s The Code Reader Podcast

Babcox Media
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The Code Reader looks at DTC’s, scan tool procedures and common diagnostic dilemmas, discussing a diagnostic approach and useful tips to help listeners make an accurate diagnosis.

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    P2422: EVAP Vent Canister Obstructed

    Today we’ll be looking at DTC P2422, which indicates that the evaporative emissions canister vent valve is obstructed. The particular vehicle we were working on was a 2008 Honda Accord, and a Honda technical service bulletin, or TSB was a big help to point us in the right direction with solving this code.

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    P00C6 & P228C on a Chevy Impala

    One of our long-time company writers Gary Goms told had been called to a local shop to lend his expertise and tools on a 2012 Chevy Impala with the flex-fuel, 3.6L GDI, or gasoline direct injection engine. There was an intermittent loss of power complaint that the shop couldn’t figure out.

    ١١ من الدقائق

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    P0420 & P0430: Catalyst Efficiency Codes

    This TSB was released by General Motors, covering most of their large SUV’s and vans that have been produced from 2002 and up. The related DTCs that a technician may find are P0420, Catalyst Efficiency Below Threshold, and/or P0430, which is the same thing, Catalyst Efficiency Below Threshold, just for bank 2. Technicians are seeing these codes on low mileage vehicles, or vehicles that have recently had the catalytic converter replaced.

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    P0300: Cold-Start Misfire or Rough Idle

    The complete symptom is a cold-start misfire or a rough idle concern. Upon inspection, the technician will find medium to high misfire counts and the symptom always occurs on one or two cylinders and goes away when the engine warms up. Now, a misfire or rough idle isn’t that uncommon in the grand scheme of things, but in this case it’s what’s causing them that’s unusual.

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    P0172: System Too Rich, Again!

    I was looking through some TSB’s and realized when we did the original P0172 podcast, I completely forgot about one possible cause of the problem that has actually been fairly common for a long time. And in reality, it’s so simple and so basic, that it could be easy to overlook. Excess fuel in the engine oil causes DTC P0172 to set, and the solution is an oil and filter change.

    ٦ من الدقائق

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    Diagnostic Dilemma: Sorting Through Multiple Trouble Codes

    An ASE-certified technician walks listeners through a diagnostic dilemma with 11 trouble codes, an intermittent problem and a dash board lit up like a Christmas tree on a 2001 Blazer.

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    P0121: Throttle Position Sensor/Switch ‘A’ Circuit Range Performance

    This is another problem that arrived at the shop of our TechShop contributor, Olle Gladso and the car was a 2013 Volkswagen Jetta with a two-liter TDI engine. It had an intermittent problem. Sometimes it ran great, but sometimes it would idle high and when you would press on the accelerator, nothing would happen.

    ٧ من الدقائق

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    Misfire Mystery

    A customer brought in a 2007 Subaru Legacy with the 2.5L 4-cylinder EJ25 engine. The owner complained of an engine vibration. From the initial description, it sounded like a pretty typical misfire issue. It turns out that about six months prior, the customer had the vehicle at another shop and the engine was overhauled. It was immediately after that the problem began.

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The Code Reader looks at DTC’s, scan tool procedures and common diagnostic dilemmas, discussing a diagnostic approach and useful tips to help listeners make an accurate diagnosis.

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    TechShop’s The Code Reader Podcast