So a bit of a back story. 2017 ram 3500, ISB6.7, 106,000km. Its been deleted since 100k. So please bare with me.
A couple weeks back it threw P0111, which indicates issues with the IAT sensor which is mounted on the air box.
Pulled the sensor, it looked just fine, clean and provided resistance that varied with airflow over the element. The harness was providing 5 volts as well. The code would clear but come back right away. I was getting some odd temp readouts while driving, they would most of the time mirror ambient. I would get it to jump 20 or 30c on deceleration some times. The code cleared itself once for a short period but then returned.
I also noticed a drop in fuel economy. Had got a high of 17.7mpg on winter blend some time before but now could only muster 16 on summer blend. I was also hearing increased clatter under load, some weird turbo surging and the odd miss and an increase in smoke on start up and acceleration.
I installed a new, non OEM sensor and was able to clear the P0111 but then was getting P2580, which indicates turbo speed sensor issue. Well I doubt that since it correlated to switching the new sensor.
Further reading recently and tying into stuff I read years ago showed that the IAT, MAP and turbo speed sensor are tied in together and may throw weird codes, not necessarily a correct one.
Today I got time to do some more trouble shooting. Pulled the MAP and as I suspected, it was coated in egr trash. It provided resistance and was easily cleaned with the proper sensor cleaning spray. Put it back in but got a pile of temp range, MAP range and service throttle codes. Great. Oh wait, sometimes, well mostly you need to plug the sensor back in. After some cycles I could clear the codes but was still getting P2580. I popped in the old sensor and was able to clear all codes. The exhaust note changed, no smoke and after a short drive, engine on/off cycles and some pss revving, no codes. I will obviously monitor but am now hopeful she is back on track.
A couple weeks back it threw P0111, which indicates issues with the IAT sensor which is mounted on the air box.
Pulled the sensor, it looked just fine, clean and provided resistance that varied with airflow over the element. The harness was providing 5 volts as well. The code would clear but come back right away. I was getting some odd temp readouts while driving, they would most of the time mirror ambient. I would get it to jump 20 or 30c on deceleration some times. The code cleared itself once for a short period but then returned.
I also noticed a drop in fuel economy. Had got a high of 17.7mpg on winter blend some time before but now could only muster 16 on summer blend. I was also hearing increased clatter under load, some weird turbo surging and the odd miss and an increase in smoke on start up and acceleration.
I installed a new, non OEM sensor and was able to clear the P0111 but then was getting P2580, which indicates turbo speed sensor issue. Well I doubt that since it correlated to switching the new sensor.
Further reading recently and tying into stuff I read years ago showed that the IAT, MAP and turbo speed sensor are tied in together and may throw weird codes, not necessarily a correct one.
Today I got time to do some more trouble shooting. Pulled the MAP and as I suspected, it was coated in egr trash. It provided resistance and was easily cleaned with the proper sensor cleaning spray. Put it back in but got a pile of temp range, MAP range and service throttle codes. Great. Oh wait, sometimes, well mostly you need to plug the sensor back in. After some cycles I could clear the codes but was still getting P2580. I popped in the old sensor and was able to clear all codes. The exhaust note changed, no smoke and after a short drive, engine on/off cycles and some pss revving, no codes. I will obviously monitor but am now hopeful she is back on track.
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