MAP sensor and purge solenoid location

LISANEVE69

MEMBER
2005 MAZDA 6
2.3L
4 CYL
2WD
AUTOMATIC
170,000 MILES

I am trying to figure out what my MAP sensor (part# KL47) connects to on my car. It has a vacuum hose that comes out the bottom of it but the hose looks like its cut or broken because it does not connect to anything else. Also I was told that I might want to replace the purge solenoid, and I have no idea where that is. My last problem is the location of my 02 sensor. What one is bank 1, front or rear? Sensor 1, upper or lower? I can't seem to find a straight answer on this subject at all. I have several DTC codes that came up for my car and most of them have to do with 02 sensor bank 1 issues. Thanks for your help.

Monday, September 2nd, 2019 AT 11:58 AM

1 Reply

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

Okay, the Manifold Absolute Pressure Sensor (MAP) is going to located in your vehicle intake manifold. If there is a vacuum hose attached it will need to be hooked up. This could very well be the problem with all Direct Trouble Codes (DTC)(s). Let me guess, do you have DTC P0172 or DTC P0174? Also bank 1 is the cylinder bank with the number 1 cylinder in it. There are 2 O2 sensors in each banks exhaust. They classified as upstream and downstream. The upstream O2 sensor id the one closest to the engine and is used for providing the Power-train Control Module (PCM) or "computer" the information so it can keep your vehicle's Air:Fuel ratio as close to stoichmetric(14.7:1) as possible. I could explain the process, but we will leave that for another time. The downstream O2 sensor, the one farthest from the engine has but one job, it checks the catalytic converter efficiency, and will only set DTCs P0420 or P0430 respective of the bank's catalytic converter it is monitoring. I have included a diagram of the MAP sensor in the diagrams down below for you. Can you please give us the DTC's you pulled from your vehicle?

Thanks,
Alex
2CarPros

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