Wher is the Mass Air Flow located. I need to clean it. Error from the OBC.Most pictures don't show it. I tryed looking from air cleaner to throttle but could only find a black box atteched to the cleaner tube. (what is thay)?

Part 21 in the diagram. Find that part in the air intake and it will be the only part with an electrical connector.

https://suzukisubaruparts.worldoemparts.com/oem-parts/suzuki-mass-air-flow-sensor-1380054g00?c=Zz1lbmdpbmUmcz1haXItaW50YWtlJmw9MTkmbj1Bc3NlbWJsaWVzIFBhZ2UmYT1zdXp1a2kmbz1hZXJpbyZ5PTIwMDQmdD1zJmU9Mi0zbC1sNC1nYXM%3D

Good images of what it looks like. It is near the throttle body. Clean that both sides at the same time with the same spray. Videos showing cleaning the throttle body normally include MAF.

https://www.carparts.com/mass-air-flow-sensor/suzuki/aerio

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Hard to believe you have a bad MAF in a 2007 caddy. How many miles on car? Have you tried cleaning the unit?

Parts store have a locator chart which should show location.

P0121 is for TPS sensor, clean your throttle body. Use a rag, toothbrush and carb cleaner. Get it clean. P0102 is for Mass air flow sensor. Try cleaning it first. No toothbrush use qtips on tiny wires. Be careful not to break wires. It's located between air filter and throttle body. Clear light and retest. If 102 returns , replace mass air flow sensor. Also test all wires at sensors. Wiggle and pull. Resolder as needed

I found a YouTube video, MAF Sensor Cleaning in Slow Motion-rzrDIRZ-ccs.webm, that showed me how to remove the mass air flow sensor and spray clean it with CRC mass air flow sensor cleanser. I bought the kit (single use of Mass Air Flow Sensor Cleaner and Throttle Body and Air-Intake Cleaner at Walmart for $7.99 in store price) and cleaned the mass air flow sensor. Then I reset the check engine light by removing and replacing the negative battery terminal. It worked. The check engine light has stayed off. I have a 2005 Toyota Matrix.

The mass air flow meter measures air flow into the throttle body.
I don't show one listed for your Sundance.

Look on top of the block at back by firewall for PCV. Other things you may want to check/clean are idle air control valve on side of throttle body, as well as mass air flow sensor in intake air assembly. Clean IAC with throttle body spray cleaner and port it is removed from well, and try. Use tuner cleaner or electrical cleaner on MAF sensor . Sometimes just cleaning will cure it.

Try this first. You can buy some MAF cleaner( not carb cleaner) and try to clean it off. Let it dry completely and don't probe the sensor with anything but spray from the cleaner. Change the air filter with a quality filter; the cheaper ones leave deposits on the sensor.

http://www.ehow.com/video_4997794_do-mass-air-flow-sensor_.html

Hi:
The mass air flow sensor is a round sensor that is mounted in the air intake, between the air cleaner box and the engine throttle body.

Removal and Installation To Remove:

1. Remove or disconnect the following:
   • Mass air flow sensor electrical connector
   • Tube clamp at the electronic throttle control actuator
   • Air cleaner to electronic throttle control actuator tube, upper air cleaner case
   • Mass air flow sensor from the cleaner case.

To Install:

1. Install or connect the following:
   • Mass air flow sensor to the cleaner case
   • Air cleaner to electronic throttle control actuator tube
   • Tube clamp at the electronic throttle control actuator
   • Mass air flow sensor electrical connector