Saab Tech Tip: Reduced Performance and DTC for EGR Valve
Under certain driving conditions, such as a lot of city driving, increased carbon deposits may cause the EGR valve to seize or jam in the open position. This can result in reduced performance for the car as the boost pressure leaks out via the EGR valve. In some cases, DTCs P0400, P0401 and P0402 may be generated ….
Tech Tip: Larry Carley Covers the Top 10 Domestic Diagnostic Codes and Fixes
Some people think a code is all you need to fix a fault and turn off the Check Engine Light (or Malfunction Indicator Lamp or MIL). A diagnostic trouble code (DTC) certainly helps, but it only tells you that some kind of fault has occurred, and maybe the circuit or component associated with the fault. But no code by itself can tell you which part to replace, because in many instances any one of several causes may have set the code ….
Honda Tech Tip: Dealing with EGR Issues
Exhaust gas recirculation (EGR) has been used for years to control combustion temperature to prevent spark knock as well as control NOx emissions. For the most part, these systems were trouble-free and required service only if you were dealing with a spark knock issue, or if the valve opened too early, resulting in a tip-in acceleration stumble, or the more common, bad idle quality caused by the valve not closing completely at idle.
Decoding the Past
“I’d like for you to hook it up to the code machine and see what it says to replace” – anonymous customer Sound about right? It sure does. Of course, as auto repair professionals, we know better. We know that reading the code is not diagnostics, but rather that is where diagnostics might begin. We
Tech Tip: Top 10 Domestic Diagnostic Codes and Fixes
A Check Engine Light that’s illuminated is always a sign that something is wrong. But what? You usually can’t tell until you plug in a code reader or scan tool and read out the code(s) that have turned on the light. At least then you have a starting point for further diagnosis. Some people think a code is all you need to fix a fault and turn off the Check Engine Light. A diagnostic trouble code certainly helps, but it only tells you that some kind of fault has occurred, and maybe the circuit or component associated with the fault.
Who’s at Fault?…Top 10 Domestic Diagnostic Codes & Fixes
A Check Engine Light that’s illuminated is always a sign that something is wrong. But what? You usually can’t tell until you plug in a code reader or scan tool and read out the code(s) that have turned on the light. At least then you have a starting point for further diagnosis. Some people think
Hyundai Tech Tip: Diagnosing Unstable Idle Conditions
Some Hyundai vehicles with 2.4L or 3.5L engines may experience an intermittent unstable idle condition. Follow this simple procedure to diagnose an intermittently sticking closed EGR solenoid valve.
Identifix Publishes 100,000th Test and Fix
Identifix, a source of online and hotline diagnostic and repair information, recently announced that it has added the 100,000th Hotline Archive to Direct-Hit; its award-winning online diagnostic product.
Better Breathing: EGR Improvements
So Why Do We Have EGR? By Glen Beanard, technical contributor The Exhaust Gas Recirculation (EGR) system was created in the early 1970s for the same No. 1 ranking motivation that drives every other engine management system design — to reduce emissions. The EGR valve targets one specific pollutant, oxides of nitrogen (NOx). Under normal
Tech Tip: Curing Unstable Idle Conditions on Hyundai Vehicles
Some Hyundai vehicles with 2.4L or 3.5L engines may experience an intermittent unstable idle condition. Follow this simple procedure to diagnose an intermittently sticking closed EGR solenoid valve.