Tonight I was going to go log some datamaster files for my car and while I was in the process I got an SES light to flash at me and go off twice. It was code 33 MAP sensor high, and code 21 Throttle Position high.

What can be the causes of these codes and also would anyone like to look at my datamaster logs, I can email them to you.

So I checked the TPS voltage and found my TPS volts is at .76 at idle and goes up to 4.98 at WOT, that seem like it isnt the problem then right?

Looking at my datamaster log shows the IAC position is around 80 at idle which is too high right? This should be around 40-50 shouldnt it?

Will slotting my TPS sensor and dropping the volts to .65ish help out with dropping the IAC?

I do have a problem that after driving around for awhile and coming to a stop or on a cold start my car seems to idle around 500-600rpm and seems like it is going to die unless I give it some gas...

Just trying to find my problems for these codes and low idle...

Any help is awesome, thanks in advance!

 

If the TPS voltage exceeds 4.90V, it sets DTC 21. (didn't I answer this on another site?)

 

I thought you said above 5 volts, sorry but thanks for all your help

 

A little more noteworthy is the fact that you have a problem with 2 signals that are going to adjacent pins on the same PCM connector! TPS goes to pin 22 of the white PCM connector and the map signal goes to pin 23 of the same white connector. Both run through the same harness and both are high. They also both get their reference from the same pin on the PCM (pin 28 on the black PCM connector).

Coincidence? I think not

 

speedy, could you explain what you are getting at, it sounds like you have an idea behind this problem?

 

check the connectors, and the wiring, you may have some wires shorted together

 

Can lead a camel to water

 

You dont have to be a smart *** about it