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TechShop’s The Code Reader Podcast
5 minutes | Feb 19, 2020
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.
11 minutes | Feb 12, 2020
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.
6 minutes | Jan 28, 2020
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.
5 minutes | Jan 13, 2020
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.
6 minutes | Dec 23, 2019
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.
6 minutes | Dec 20, 2019
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.
7 minutes | Dec 6, 2019
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.
6 minutes | Nov 25, 2019
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.
6 minutes | Nov 7, 2019
Maximizing Tools: P0304
A customer brought in a 2004 BMW X5 with the well-known M54 engine. The complaint was that the engine was running unusually rough and the check engine light was on. A DTC scan revealed DTC P0304, cylinder misfire cylinder 4.
7 minutes | Oct 25, 2019
P0340: CMP Circuit Malfunction Bank 1
A customer brought in a 2003 Mitsubishi Eclipse with the 4G64 2.4 liter and a complaint of a rough running condition and a no-start when warm. A DTC scan revealed DTC P0340, or CMP (camshaft position sensor) Circuit Malfunction Bank 1.
5 minutes | Oct 11, 2019
P0136: O2 Sensor Circuit Low Voltage
This code monitors the oxygen sensor voltage and when it sets, it means that the PCM sees that it has remained low for over a predetermined amount of time, usually 2-4 minutes, but that varies depending on manufacturer.
8 minutes | Sep 24, 2019
Clearing DTCs & Readiness Monitors
TechShop discusses the relationship between clearing DTCs and readiness monitors.
7 minutes | Sep 9, 2019
P0300: Random Misfire Detected
An ASE Certified Technician breaks down DTC P0300, identifies the symptoms and causes and walks listeners through a diagnostic solution.
4 minutes | Aug 21, 2019
Tech Tip: P0128
TechShop's ASE-certified technicians share and review a Technical Service Bulletin that applies to 2016 to 2019 Ford Fiesta vehicles with DTC P0128.
4 minutes | Aug 9, 2019
Tech Tip: GMC Sierra 2500
An ASE Certified technician walks listeners through an unusual problem on a 2005 GMC Sierra 2500 4WD truck. This tip is brought to you by AllData.
5 minutes | Jul 22, 2019
P0172: System Too Rich Bank 1
When P0172 is stored, it means that the control unit has recognized through the readings from the oxygen or air/fuel ratio sensors that there is a lack of oxygen in the exhaust, representing too much fuel in the combustion process.
5 minutes | Jul 8, 2019
P0455: Evap System Large Leak Detected
P0455 is a common EVAP trouble code and one whose description quite often accurately reflects what is causing the problem. The purpose of the evaporative emission system is to prevent the fuel vapors in the gas tank from escaping into the atmosphere and when this code sets, it’s a good bet that they are.
5 minutes | Jun 20, 2019
P0171: System Too Lean Bank 1
An ASE Certified Technician breaks down DTC P0171, identifies the symptoms and causes and walks listeners through a diagnostic solution.
5 minutes | May 31, 2019
P0401- EGR Insufficient Flow
Our scan tool is reading a diagnostic trouble code of P0401- EGR Insufficient Flow. An ASE Certified Technician identifies the symptoms and causes of a P0401, and walks listeners through a diagnostic solution.
4 minutes | May 22, 2019
P0420 - Catalyst System Efficiency Below Threshold
An ASE Certified Technician identifies the symptoms and causes of a P0420, walks listeners through a diagnostic solution.
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