ASE X1: Diagnostic Tests For Catalytic Converters
The X1 ASE Certification Test has a section (8 questions) focused on emissions system diagnosis. For that section, among other things, you will need to: • Identify failed catalytic converter(s); determine cause of failure; determine needed repair. • Identify failed oxygen sensor(s) (O2S/HO2S) component(s) and circuitry; determine cause of failure; determine needed repair. • Inspect
Tech Tip: Check Engine Light Is On With Fault Code P0420
Affected Vehicles: 2000 Volkswagen Jetta GLS 2.0L 2001 Audi A6 Quattro 4.2L; Beetle 2.0L; Jetta GL 2.0L, GLS 1.8L Turbo, GLS 2.0L, GLX 2.8L; Passat 1.8L, 2.8L 2002 A6 Quattro 3.0L; Beetle 2.0L; Cabrio 2.0L; Jetta GLS 2.0L; Passat 1.8L Turbo, 4 Motion 2.8L 2003 Beetle 1.8L, 2.0L; Jetta GL 2.0L, GLS 2.0L, GLS 2.8L,
Fuel Handling Tips From Delphi
• Check the condition of the fuel. Some contaminants are visible, but some problems such as wrong fuel type (e.g., ethanol) are not. • If pressure is low and amperage is above specification, check: 1) Fuel filter; 2) Fuel line restrictions; 3) Possible defective fuel pump. • If pressure is low and amperage is below
Catalytic Converter Break-In Periods
A replacement catalytic converter needs a proper “break-in” period. If the converter is not warmed-up (broken-in) properly, the substrate inside could be adversely affected and eventually cause the converter to fail down the road. The problem typically occurs when a shop installs the converter and immediately returns the vehicle to the customer. The customer drives
Anatomy Of An Oxygen Sensor
Did you ever wonder where a chemistry or physics class could come in handy? The knowledge from these studies can help you understand a problem with a fuel delivery system. For instance, the oxygen sensor was originally called a Lambda sensor. The Greek letter Lambda is used to describe the voltage range of the sensor
Understanding Codes And Catalytic Converters
Here is a dilemma that many shops encounter on a regular basis. A good customer comes in with the engine light ablaze. Running your usual diagnostics, you encounter a catalytic converter efficiency code, slow to respond oxygen sensor or some proprietary fuel trim code. Other than the light, the customer has not noticed any other
Beyond the Warranty Maintenance Checklist
What happens after the bumper-to-bumper and powertrain warranties wear out? If you look at any factory-recommended service intervals, after 100,000 miles they cease to exist. What does it take to keep a vehicle going for 120,000, 180,000 or 250,000 miles? The key is maintenance and
Walker Kicks Off Spring Car Care Season With ‘Exhaust Extravaganza’ Promotion For Consumers
Tenneco’s Walker emissions control brand will help consumers save on emissions control products – including mufflers, welded assemblies and catalytic converters – this spring through its “Exhaust Extravaganza” spring promotion. The Walker “Exhaust Extravaganza” promotion is available from April 1 to May 31, 2014.
Sorting Out New Catalytic Converter Mandates
AutoCarePro sister publication Counterman magazine recently asked Henry Hippert, executive sales director of Eastern Catalytic, to bring readers up to speed on rules and regulations regarding catalytic converters.
BMW Fuel System Repair Essentials
The BMW N54 fuel pump recall a few years ago brought to light the importance of the integrity of the fuel system and how it can contribute to the overall reliability of a vehicle. These fuel quality issues apply to all BMW vehicles with either port or direct injection. The underlying message here is that if the cleanliness and overall integrity of the fuel tank is ignored, it will damage any fuel pump. This is why addressing the fuel tank is essential during any pump replacement to prevent costly comebacks that can also hurt your reputation.
Thumping Noise At Cold Start On Honda Accord
Honda Accord owners may report a thump as the ignition switch is released from the start position or as the engine starts. This noise sounds similar to a rubber mallet striking the frame and occurs only on a cold start (the vehicle has been sitting for some time, usually overnight).
Snap Test: MAF Sensor Diagnostics
You’d think a service light would be the first indicator of a mass air flow (MAF) sensor problem, but there are times a problem develops with the MAF and no service light comes on. Scott “Gonzo” Weaver explains how poor idle, loss of performance, sluggish performance and even stalling are all associated with a failing MAF sensor.