Baro reading and P0101 MAF DTC

[drover]

I don't think you will find much in the way of listings as your model never existed in the US, so its ignored, I have had a look at the Australian Bosch Catalogue and they list bugger all for JGC yet the part numbers pop up on the UK catalogue including the Bosch part number on mine identifies as a Map sensor, and the number stamped on yoours ids so really if you go by the Bosch 0281006076 number its going to be the correct item, if its taken me a couple of hours to confirm it i doubt the spotty faced behind the counter who knows stuff all about Jeeps will manage it in a few minutes..... The most curious thing is in all these Bosch Catalogues parts that I know fit the vehicle, the catalogue says NO or just doesn't list anything, so one could assume that Chrysler has vetoed listing of parts, hence the massive cross referencing that needs to be done, the best compatability listing is the part number in the vehicle.....

Here's the Bosch UK online catalogue, the part numbers shows but not a listing for a Jeep .... https://www.boschaftermarket.com/gb/...d_accessories/

[Adrian2012]

Update: I received the NEW MAP sensor and fitted it. I still have zero Baro reading on the Jeep but the same scanner reads Baro 101kPa on my Pajero, so not the scanner. Vacuum or air leaks can cause P0101 so I used a can of "Start You Bastard" ether spray and while running I sprayed all the connections linked to the air intake and turbo etc. No effect so no air/vacuum leaks. In the morning I can start the car and get full turbo power although sometimes a bit rough and lumpy on idle, so probably not the turbo actuator being stuck. I can go 2 to 5klms until the P0101 kicks in and I lose turbo but runs smoother, then sometimes the engine light and throttle warning light comes on and I have P0209 Turbo underboost [obvious]. I can do motorway speeds Ok just no turbo boost. I went down to Sydney from the Central Coast and there are a few big uphills and without turbo the worst the car slowed to was 85kmh. I am definitely getting signals along the wiring to the PCM from both MAP and MAF. I don't get EGR DTC's any more.

[Treebreakerbob]

Hi Adrian, just been reading this thread, I don’t think I can be of much help, except to say the complexity of the interconnected computer systems on these vehicles is absolutely absurd. To give you an idea the gearbox controls the idle speed, and the conductor plate in the valve body can alter all sorts of engine performance. According to my manual if you decelerate firmly the fuel supply is stopped which brings me to saying the VV fuel relay circuit board I installed works well and has improved the cars response but I am still getting the throttle body light and engine light, also sometimes a little stumble which confirms to me fuel flow is being interrupted but where, the pcm (ecu), the fuel pump itself, pressure control valve, M Prop solenoid, gearbox issues. Funny thing a local mechanic said dry joints in pcm’s cause all sorts of crap. I am with Farwest in saying All Grand Cherokee in Melbourne is worth a phone call. At least your problem seems to happen as soon as your vehicle warms up and the engine is going from warming up settings to run settings. Sorry I am not of much help

[FARWEST]

Not happy to hear your still having issues after fitting the VV solution...that sux bob....and it also sux for those of us, well me, that thought the VV solution was the be all and end all to the FP Relay issue and its 'side effects'....poo

[Adrian2012]

I have spoken with Tam last week and discussed scanner readings. I will be checking and making notes and get back to Tam. I have a brand new Bosch with exact same item number coming in soon. I will see if that improves. I still think I will need the auto electrician to review and see if any scanner adjustments can help as well, such as a recalibration of whatever.