OBD II Engine Diagnostics: Not as Simple as it Seems
Anybody can plug a scan tool into a vehicle and read codes. But do they know what the codes mean, how to diagnose the fault or, most importantly, how to fix the vehicle? The problem with reading OBD II codes is that the code tells you only that a fault has occurred. It does not
P0401 Codes and EGR Issues
As emission controls got tighter, and with the advent of OBD II, things started to change. We not only saw additional driveability complaints, but we also had the check engine light (CEL) telling the customer there was an emissions failure that had to be dealt with for the good of the environment and, in most
Tech Update: A to VSV…Troubleshooting Toyota/Lelxus EVAP Systems
When I first had to diagnose a Toyota EVAP code, I found the available information a little lacking. So I decided to do a little homework…and the following article is the result of what I’ve learned. I hope it helps you diagnose and repair these systems a little easier. First, a word on basic EVAP