Posting my solution for anyone who finds themselves in the same situation 
I pulled out two sensors - the exhaust pressure sensor and the inlet MAP sensor.
The exhaust pressure sensor looked totally fine visually, however the hose that it sits into was stuffed with carbon. I had read that Mazda have modified this sensor numerous times so I decided to order a new one in local dealer for €150. My current sensor had an orange top, the new one is more metalic, comes with a new bracket and hose that you must replace because it sits lower than the previous one. it also comes with new wiring which you simply piggy back off the original wire as an extension.
The MAP sensor, well that was a problem. I read that this is a simple sensor to pull and gives you a good indication of the level of carbon deposits. My code reader was also showing a contant reading of 10kpa, so I thought it needed investigation. The sensor sits slightly above the alternator with one 8mm bolt and a wire leading to it. I removed the bolt, pulled the sensor, it took quite a lot of pressure, the body came out, and left the tip of the sensor behind in the engine 🙃 .. I took a long threaded screw, twisted it into the broken tip and pulled it out with a little manipulation. The sensor was baked with carbon. Tip to anyone doing this, don't pull the sensor straight out, lightly twist clockwise, anti clockwise, with slight backward pressure.
Replaced both sensors with parts SHY6-18-W00 and SH01-18-211.
Started up with a lot of fumes, cleared codes and she's been running great!
I pulled out two sensors - the exhaust pressure sensor and the inlet MAP sensor.
The exhaust pressure sensor looked totally fine visually, however the hose that it sits into was stuffed with carbon. I had read that Mazda have modified this sensor numerous times so I decided to order a new one in local dealer for €150. My current sensor had an orange top, the new one is more metalic, comes with a new bracket and hose that you must replace because it sits lower than the previous one. it also comes with new wiring which you simply piggy back off the original wire as an extension.
The MAP sensor, well that was a problem. I read that this is a simple sensor to pull and gives you a good indication of the level of carbon deposits. My code reader was also showing a contant reading of 10kpa, so I thought it needed investigation. The sensor sits slightly above the alternator with one 8mm bolt and a wire leading to it. I removed the bolt, pulled the sensor, it took quite a lot of pressure, the body came out, and left the tip of the sensor behind in the engine 🙃 .. I took a long threaded screw, twisted it into the broken tip and pulled it out with a little manipulation. The sensor was baked with carbon. Tip to anyone doing this, don't pull the sensor straight out, lightly twist clockwise, anti clockwise, with slight backward pressure.
Replaced both sensors with parts SHY6-18-W00 and SH01-18-211.
Started up with a lot of fumes, cleared codes and she's been running great!
