Check Engine Light Codes

Rickw wrote:

Has anyone removed the airbox cover (where your air filter is located) and left the connector to your Intake Air Sensor disconnected.
The Intake Air Sensor is mounted into the airbox, if it is left disconnected while you run the engine you will get this code.
You should not get a poor running engine from it, but who knows.
Stranger things have been known to happen!!!!

I did this inadvertently, it sets a code after the 2nd or 3rd start and runs like crap (think limp mode)

Albertj

PS to Lola: if you possibly can, get the spark plug wires at a GM (Buick) dealer near you. Other company's wires will not likely be so good or last as long -- but will cost about the same money. And be sure to keep and reuse the little metal tubes that are on the wires near the exhaust manifold.

Thanks for confirmation on that.
I know on an 1994 Blazer i had it would immediately trip the light and run rough, but that was OBD1 without a MAF sensor.
So i didn't quite know how leaving the sensor disconnected on our vehicles would effect the way the engine ran.

Yeah and I felt like such a DOPE when I did it, too. I had changed oil, and oil and air filters and just forgot to put the AF sensor back in the air box. Car sets a code, runs like poop. I take to deale in the morning, go to work. They call in less than an hour, "car's fixed." I ask what's wrong. Service advisor laughs, "We'll tell you when you get here..."

I forget what that service call cost me.

Albertj

It's not a matter of leaving the sensor and harness hooked up and not installed in the airbox, that won't trip the light.
It's when you disconnect the harness from the sensor and leave that disconnected for a few drive cycles that the PCM gets unhappy.

albertj wrote:

Yeah and I felt like such a DOPE when I did it, too. I had changed oil, and oil and air filters and just forgot to put the AF sensor back in the air box. Car sets a code, runs like poop. I take to deale in the morning, go to work. They call in less than an hour, "car's fixed." I ask what's wrong. Service advisor laughs, "We'll tell you when you get here..."

I forget what that service call cost me.

Albertj

lol thats funny.