#Genisys scan tool 202 resistor r85 code#

But a bi-directional scan tool can do a lot more. One example is the ability to force the ABS system to perform a bleed procedure where it purges air from the ABS control valves. What is a bi-directional scan tool?ДЇactory scan tools not only read data from the computer but also command the computer to perform tasks. A scan tool with those capabilities allows you to diagnose ABS, stability control, airbag, and high end automotive accessories like memory seats, cruise control, etc. These units display generic, enhanced, and manufacturer specific powertrain (P), body (B), chassis (C), and communications (U) trouble codes. The better scan tools display engine temperature, fuel trim, oxygen sensor readings, MAF sensor readings, etc. Live data is actual readings from the computer, so you can see whatвЂ™s happening in real time.

#Genisys scan tool 202 resistor r85 code#

The most basic scan tools cost around $100 and still limit you to reading generic powertrain (P) codes and the code definition. What is an OBDII scan toolДЄ scan tool costs more because it does more. And many of those higher end readers are update-able (as manufacturers develop new codes). Dig deeper still and youвЂ™ll get a code reader thatвЂ™ll spit out the code definitions right on the screen. Dig a little deeper and youвЂ™ll get a code reader with a back-lit screen. But if you spend a bit more, the code reader will have a battery that maintains the code information in memory. So youвЂ™d better bring a pen and paper with you. Oh, by the way, once you unplug it, the information is gone. Once you have the code, youвЂ™ll have to go to your home computer to look up the code definition. That means you can scan for the code and read the trouble code only as long as itвЂ™s plugged into the computer. The cheapest code readers donвЂ™t have batteries. The bottom line with code readers is that they at least give you a starting point for your diagnosis, but can leave you stranded if you need more data to narrow the root cause. Read this post to learn more about readiness monitors. The higher end models also display the readiness monitor status. Or, you can spend a bit more (around $50) and get a code reader that displays both the code and the definition. You can buy an economy code reader for around $30 that displays only generic powertrain (P) codes but doesnвЂ™t give you the definition of the code. ThatвЂ™s because you really have a B, C, or U trouble code or a manufacturer-specific code stored that your code reader canвЂ™t read. If you buy one of those, you can wind up in a situation where you have a check engine light but the code reader comes up with no codes. The cheapest code readers and scan only read P0xxx trouble codes. If the second character is a вЂњ2вЂќ itвЂ™s a generic code that refers to a system thatвЂ™s not part of the vehicle system setup shown above. And, carmakers can change the meaning for the same code between years and engines. To find the definition of a P1584, youвЂ™ll have to know the year, make, model and engine before you can look up the code meaning. However, if the second character is a вЂњ1вЂќ, then youвЂ™re looking at a manufacturer-specific trouble code. So a P0304 means Cylinder 4 Misfire Detected. The third character tells you which vehicle system the code is from.Д вЂ“ Fuel and air metering and auxiliary emission controlsДў вЂ“ Fuel and air metering (injector circuit)ДҐ вЂ“ Vehicle speed control and idle control systems So a P0171 mean System Too Lean (Bank 1) for every year, make and model. If the second character is a вЂњ0вЂќ the code is a generic code and means the same thing across all makes and models. Within those categories are generic and manufacturer-specific trouble codes. Here are the prefix letters and what they mean: You have to understand how the trouble codes are arranged before you can decide which code reader or scan tool to buy. sets the standards for generic codes but the carmakers themselves set the definitions for manufacturer-specific codes. OBDII trouble codes come in many varieties.