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George H.
George H., ASE Certified Technician
Category: Car
Satisfied Customers: 18668
Experience:  ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
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Location of manifold absolute pressure sensor 03 kia rio 1.6

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location of manifold absolute pressure sensor 03 kia rio 1.6

Hello I will help you with your question,


This engine management system uses a Mass Air Flow sensor and does not employ a MAP sensor such as a Speed Density system uses so that is why you have not been able to find the sensor for this motor.


Let me know what I can do to help you with this


Thank you



Customer: replied 7 years ago.
Thank you for your speedy response. I trust your response to be correct, which is just great and I appreciate that. But, I'm more confused because I'm holding a part from NAPA . They said it was my map sensor. Maybe if I could take a bit more of your time and try to explain my situation. I bought this car used several weeks ago, the previous owner was a mechanic. He said he had to replace the head because it had broke its timiing belt. Of course, it being an interference engine, it bent valves. But he assured me that the pistons were not damaged severely. So he put a used head on and it had a slight tap, thought to be a lifter. But it ran good so I decided to buy it. I drove 2 hrs. home, it ran fine. In fact, I was surprised how peppy the little 1.6 engine was. But on the way home, the check engine light came on and it started to run poor. I went to Auto Zone and had them check codes . P1106: map sensor, Code P0101: mass airflow sensor (which I replaced), the throttle positioning sensor (which I tested several times with my ohn meter), and slowly rotated looking for a blank space or a sudden jump in ohns. It seemed to test fine.(Also keep in mind, I'm a carpenter in over his head doing mechanics work) The other fault code is P0325: the knock sensor, which I bought new and returned because my testing method (which may have fault) . I plugged in the new knock sensor and Laid it on the engine while it was running. The motor stumbled and lacked power just as it always had done even with no knock sensor plugged in. The motor idles poorly and sometimes will fall down to 500 rpm. Then it will struggle back up to 900 rpm or sometimes even die. When out on the road, it also lacks any power and pick up. It could hardly make enough power to climb the ramps in the driveway. I also changed to new spark plugs NGK's. And the plug wires show no arc to ground at night, even with water misted on them. They seem to be newer wires. This car only has 76,000 miles. Just a thought, would the knock sensor pick up the tapping and retard the spark? I realize this is a much more involved question now and my payment will reflect this. Looking forward to your response. Thank you, Mark @ XXX-XXX-XXXX

I think where they went wrong was they used a generic scanner to pull the codes. Sometimes these will misinterpert the manufacturers codes (P1XXX) Anything that starts with the P1 is not an OBD code so the translation may be off.


There are other years that a MAP sensor was used to sense EGR flow but this is not one of them. On the Hyundai accent of the same year there is a MAP/IAT mounted on the plenum on the 1.6L engine




I suspect that the timing belt/head replacement may be the root of your problem as there may be a vacuum leak or the timing may be off. I would have to start by blocking the purge line and the EGR and see if there is a change. Work/clean the IAC (Idle air control) and see if there is a change. The factory scantool will not provide much information so your best diagnostic will be to see what you can do to make the poor/surging idle change. These had a problem with the TPS and you did the accepted test, one more is to push on the front of the case to see if you can change the idle.



Let me know if you have the map as shown on the Hyundai engine and if the head was a 2003 head from a KIA.


I will do what I can to help you from here but this will be a matter of testing to find the cause and no silver bullet will find the problem. The timing can be checked by removing the upper timing cover, rotating the engine to the TDC mark on the balancer and checking the cam timing against the head.




George H. and other Car Specialists are ready to help you

This engine does not have an EGR valve that is external so you are left with the ISC or IAC. Here is a TSB about cleaning the ISC and throttle plates, the ISC is the other connector on the throttle body, you already know the TPS





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