Unable to Read Your OBD-II Codes?

PP — Fuel and Air Metering. When the problem goes away, the lamp goes off.

How to Read and Understand Check Engine Light (OBD-II) Codes

Comments Have your say about what you just read! With full manuals for over 30, vehicles online, you will find an exact match for your vehicle's year, make and model. U - Undefined. Not Helpful 4 Helpful 6. Not Helpful 0 Helpful 1. This may be a hexadecimal number i. The code I am getting is not in my book. The most common are Active codes and Pending codes. Im interested in any information you have I have a 94 mustang 5. I have a '92 Buick LaSabre and can not find anyone with a machine to diagnose the problem.

It also monitors the operation of the catalytic converter with a second oxygen sensor on the tailpipe side of the converter. That's hard to see on most engines. Only after fixing, you should proceed to resetting the check engine light. Not Helpful 10 Helpful 6.

Raspberry Pi Dongle: How to Read and Reset Fault Codes From Your Vehicle - lamomiedesign.com

Turn ignition key to the ON position. DanielH Question 10 months ago. The computer in your car or truck is constantly monitoring all of these sensors to be sure they are all reading in what the manufacturer has decided is the optimum or safe range. Another problem you may encounter with inexpensive code readers and scan tools is that they will only read generic PO fault codes, or that they cannot read some or all of the manufacturer specific P1 fault codes.

The first generation systems couldn't detect engine misfire, how well the catalytic converter was functioning or whether a vehicle was leaking fuel vapors into the atmosphere. Get a paper clip or a piece of wire with the ends stripped off.

This information should work for any vehicle built from to today there will be exceptions though. In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the intake air temperature IAT sensor reading, the engine coolant temperature ECT sensor reading, and the speed of the vehicle. As with the individual cylinder misfire codes, the technician still has to figure out what's causing the problem and then fix it.

This covers the engine, transmission, fuel system, ignition, emissions, and more. It is very important to write these codes down in the same order as displayed on the scanner.

How to Read and Understand OBD Codes: 10 Steps (with Pictures)

On and newer vehicles is OBD II, the connectors are all the same - but the software and hardware that is required to read the codes can vary depending on the year, make and model of your vehicle.

The idle air control valve and VSS would fall under this category. My problem is finding out where on the car that part is located.