hi ive got a 07 h3 5cyl. the engine light has come on and I scanned it with obd2 and my smart phone and it came up with p04? I cant seem to find any info on that code.any ideas would be greatfull.thanks

 

You're missing a couple of digits... Unless I am mistaken, GM OBD2 codes are always in a P0XXX format, and P04 would be emissions related. The last two digits would indicate what component of the emissions system is at fault.

 

ive cleared it but if it comes back ill scan it and take a screen shot and add it here.im sure it said p04 but could be mistaken.thanks

 

What ProphetPVD said.....

FAQ: OBD2 Codes Explained
OBD-II codes consist of a number of parts. Here is a sample OBD2 code: P0171
Here is a breakdown of what each digit of the code means:
First Character - System The first character identifies identifies the system related to the trouble code.
P = Powertrain
B = Body
C = Chassis
U = Undefined Second Digit - Code Type
The second digit identifies whether the code is a generic code (same on all OBD-II equpped vehicles), or a manufacturer specific code. 0 = Generic (this is the digit zero -- not the letter "O") 1 = Enhanced (manufacturer specific)
Third Digit - Sub-System The third digit denotes the type of sub-system that pertains to the code
1 = Emission Management (Fuel or Air)
2 = Injector Circuit (Fuel or Air)
3 = Ignition or Misfire
4 = Emission Control
5 = Vehicle Speed & Idle Control
6 = Computer & Output Circuit
7 = Transmission
8 = Transmission
9 = SAE Reserved
0 = SAE Reserved
Fourth and Fifth Digits These digits, along with the others, are variable, and relate to a particular problem. For example,a P0171 code means P0171 - System Too Lean (Bank 1).

Read more at: OBD-II Codes Defined

 

thanks guys it was the petrol cap causing the engine light to be on.some1 tried steal it :-(