Took my car to inspection today. When they hooked up the comp to the OBD II to check the emissions they said it was not communicationg. So I failed since they couldnt get a reading. Any ideas on what to check?

 

Check fuse 29 in the passenger foot well fuse box. That powers the ODBII pin 16 of the ODBII port which will power their scan tool. If that fuse is good use the DIC to check codes. This page explains how.

http://www.stengel.net/diccodes.htm

Let us know what you find.

 

ok fuse 29 is fine. i got the codes. all of the had the "H" after them whick means that it has already been corrected. there was one code that had an "H" and then a "C" after it. does the "C" mean its a reoccuring problem?

codes were
U1255-H
U1096-H
U1064-H
U1016-H

B0851-H
B2605-H

B2286-H
B2285-H
U1064-H

U1160-H
B0361-H

B2282-H
B2284-H
U1064-H

P0420-H-C<------------Is this where my problem is????
P1431-H

Thanks for the help!

 

OK, fuse good means you should have power in the ODBII port on pin 16, that is good. You can read the codes with your DIC so your data buss is currently working properly, that is a good thing. That means their scan tool should have been able to communicate with your car.

All those U codes are disturbing. You should never see any of those. They mean you have had a serious data buss malfunction. First, now that you have all the codes wrote down, clear all codes if you have not done so already. Drive it a bit and see which ones keep coming back. Many codes can come from a dead or low battery so those may not be really too bad if they don't come back. Also, if the inspection station's scan tool was defective and shorted your buss down then it would not communicate and possible be why you have all those U code. Just a thought, may not have anything to do with them.

That 0420 is related to degraded left side catalytic converter performance. May or may not be a real problem. Clear all the codes and drive it a bit. The main thing is you don't want to see any U codes showing back up again.

If you have a old or weak battery you may want to looking into replacing it, that can cause lots of electrical problems in these cars.

Let us know which codes come back.

 

Ok I will clear all the codes and see what comes back. I know the battery died not long ago. Maybe that is why there are all the codes. How long should I drive and wait before I check again? Should I find somebody that has a scan tool to try and see if theirs communicates? Thanks for the help!

 

Cleared them all out. B0446 keeps coming back. Right Actuator Out of Range. Why does this keep coming back.

 

That code is the air mixing doors in the HVAC system. I assume you do have the auto HVAC option? This explains how the system works. You could try the reinitialization as shown below.

The HVAC Control Assembly receives an actuator position signal from the RH and LH electric actuators. The electric actuator position sensor is a potentiometer that is tied to a 5 volt reference source through CKT 1791 and to ground through CKT 1798, both from the HVAC Control Assembly. The variable output from the potentiometer feeds back a position signal to a pull-up resistor located in the HVAC Control Assembly. This signal is used to determine the necessary drive signal to the electric actuator motor to provide the proper air mix door position. This value is stored in the Keep Alive Memory (KAM) portion of the HVAC Control Assembly.

After replacement of either the LH or RH electric actuator has been completed, reinitialization of the actuators must be performed. Reinitialization can be easily executed by removing the HVAC CON MiniFuse® #27 from the Instrument Panel Electrical Center and then reinstalling the fuse back into its proper position. When the HVAC Control Assembly is first connected to power, the system will perform an initialization routine lasting approximately 60 seconds. During this routine, both RH and LH electric actuators will cycle full travel in both directions learning the end positions. Position feedback readings are sent back to the HVAC Control Assembly and compared to a range of acceptable end readings. If during initialization the position feedback readings are not within the acceptable range, a diagnostic code will be set. If the position feedback readings reach values of 0-5 counts or 250-255 counts, the HVAC Control Assembly will then interpret the reading as a "feedback-short" or "feedback-open" condition respectively. NOTE: Feedback-short or feedback-open conditions can occur due to electric actuators being initialized while not being attached to the HVAC module case.

 

Thanks man. Ill give it a shot. I will drive and check for new codes and get a hold of a scanner to see if I can get a reading with another machine. I will keep you posed. Thanks again for the help.