Ok so I picked up an obd bluetooth device and plugged it in. It works as far as i can tell reads rpm, mph etc. However when i asked to check codes It came back as no codes found. For those of you who have used one, does it take some time to store up codes or will it read what is stored previously. I find it hard tp believe that my 2008 h3 lux w/ adventure package has had no codes for 1200 miles. I am assuming that the dealership I purchased it from cleared them when resetting the service tpm message before I drove it home. Os it possible to have no codes stored for that long? Can I assume that my H3 is in excellent health?
experience and opinion welcomed.
thank you.

 

No codes, that's a good thing!

Most Bluetooth readers won't read abs, safety, body and other codes. They are pretty much engine and trans fault code programmed.

 

I MOVED this because it is NOT anything even resembling and FAQ! Please do not post anything in the FAQ section.

Note that the 3rd thread stuck at the top says: Do not post in this section.
https://www.hummerforums.com/forum/h...section-19461/

Thank you and carry on.

 

Sorry Doc - I didn't mean to put it this forum - I was using my phone and didn't realize what forum I was in. I realized it when I got the reply. I will endeavor to do better.

 

No worries.

I can't see what's on my phone, so I use it to call people and talk.... like a phone.

 

Yeah neither can I but when you are sitting on the toilet the laptop battery gets hot and burns your legs

 

Try using an Ipad! They are designed for comfortable toilet use.

 

This went to the can quick

 

If the check engine light is not on, why would you assume that there would be any codes? 1200 miles is not very long, but even if that's a typo and you meant 120,000, unless the CEL is on, there is no reason to think that there are any codes stored. Here's some more info on codes:


"All vehicles have two categories of DTC: "Pending", which is a detected fault, but doesn't set the Check Engine Light (CEL, SES) until the condition is detected again a certain number of times. The number of "drive cycles" required to promote a "pending" to a CEL depends on the fault, the implementation, and the vehicle.

The other category of DTC is "stored" or "logged". These are true fault codes that have been promoted from "pending" status to a real-deal fault code, and they by OBD2 definition must set the CEL.

In addition, some Engine Control Units/Modules (ECU/ECM) have the capability of logging a few or dozens of "historical" fault codes, regardless if they have been repaired and/or cleared. This provides background to an astute technician, even when there is no current pending or logged DTC faults. (I have no clue if our H3's are capable of this)

DTC codes do NOT have to be cleared "manually". If the condition that caused the fault is repaired, or simply no longer occurring (P0420 catalyst efficiency a classic example) the code will eventually "clear itself" so to speak after a certain number of drive cycles without the fault reoccurring. The number of drive cycles required to clear an active CEL DTC depends on the fault and software implementation. In most cases, however, a technician clears these codes after a valid repair to assure the customer that the repair is complete. But they don't HAVE to; it's a courtesy. The ECU/ECM constantly monitors the PID and emission conditions, and will eventually relent, given enough "clean" drive cycles."