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Old 27-12-2010   #1
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04 Stilo keeps going into limp home mode P0220

Hi
I'm having the same problem that a lot of jtd owners are having.04 stilo jtd mw 121000 miles.Drives great then goes in limp home mode and loose connetion on dash.I have Ecuscan 2.6.1 scan came up with P0220 an air con fault and a pre heat fault was working fine with seconed two faults untill I went to the car wash.I don't have underside plastic tray on the car,engine light came on as the carwash washed the underside of the car.I've had this fault before always seem to be in the wet.Got new peddle and good bocsh battery last time didn't solve it last time just went on holiday and worked fine when I got back for the last 4 months.I think it just dryed out.Checked earth pionts that I could find,checked and cleaned fuses and D4 by battery.Even had laptop next to me with a friend pressing F10 on Ecuscan resets and gives me power back but fault P0220 still showing.Sometimes key out start it up again will get me out of limp home mode.Any Help would be appreciated.Thanks for your time Olly
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Old 27-12-2010   #2
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Re: 04 Stilo keeps going into limp home mode P0220

Forgot to say also had new brake switch about same time as battery about 6months ago.The other strange one is when it goes into limp home mode if I put the car into reverse the revs come back then go when I put it 1st Gear back to limp home mode oh yes reverse lights not working.
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Last edited by olly0404; 27-12-2010 at 06:04. Reason: more info
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Old 28-12-2010   #3
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Re: 04 Stilo keeps going into limp home mode P0220

Check the earth points with a multimeter (There is a topic in the guides section) and if youve had it power washed i believe its normally the crack sensor which is above one of the wheel arches drivers side i think can cause problems. Goodluck.
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Old 29-12-2010   #4
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Re: 04 Stilo keeps going into limp home mode P0220

Update-Had a check of the earths sorry no multimeter think got them all cleaned d4 checked fuses ?
now getting on Ecuscan

P0220- Accelerator pedal sensor 2 -signal high

P0530- AirCon pressure sensor (always been there)

P0380- Board relay,thermostarter or preheat ECU

U1601- Can messages TX(C-CAN)

U1706- Engine >ABS Data line

U1700- CAN:Body Computer conn. fault (1)

Starts up Can rest P0220 , P0530 come back ?Drove it back from a friends was fine but dash was going Crazy
Anyone Help me ?
TA
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Old 07-01-2011   #5
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Re: 04 Stilo keeps going into limp home mode P0220

Quick update I have now got my baby working agian all I did was check my brake switch.I pulled the plunger pin on the switch out and reset it with 1mm gap fixed ! Engine managment went out afther three good starts Ecuscan cleared P0220
I still getting a the odd engine managment light only in the wet but goes after its drys out ? still not sure why but have a feeling it has something to do with the plastic under tray missing.

Thanks for all Posts and Guides that have helped.
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Old 04-02-2011   #6
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Loose connection and Car Security Failure

Help Loose connection error and the Car wont start. The message appeared after Car Security Failure message.
I've been to Fiat dealer very helpfull guy plug his computer in for free cleared all the codes same problem.He thinks it may be the ECU is not talking to the key.I fitted new pick up ring cheapest place to start £5.80 still no joy have check all the earths , D4, cleaned with connetion cleaner.I'm all out of Ideas sick of Fiat intermittent electrical faults
1.9 jtd stilo 04
P0220 still read my other posts turn out to be brake switch but is back
https://www.fiatforum.com/stilo/2575...ode-p0220.html
U1600
U1700
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Last edited by olly0404; 04-02-2011 at 15:36.
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Old 04-02-2011   #7
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Re: Loose connection and Car Security Failure

Moved this here to your original thread, best to keep all the information in the same place.

Most likely candidate is still the D4 connector, did you disconnect it before using contact cleaner on it?

Do you have the battery cover on the car? if the problem is water ingress related, it could be water getting into the grey fuse box at the back of the battery. This would throw up various warnings.

Does the car never start? or did it start just enough to get it to the Fiat dealer and back?
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Old 05-02-2011   #8
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Re: 04 Stilo keeps going into limp home mode P0220

I'd put a new brake light switch in there. They're quite cheap and not too difficult to replace. You know there's a problem there. If the switch shows constant brake ON and you go on the gas then you get a P0220 -gas pedal signal- and limp mode because car can't work out what want. There's two switches inside and the switch can show on and off at the same time when it starts playing up which confuses the ECU and they're not very robust switches

P0530 is more often aircon low gas but otherwise a pressurestat circuit problem

Once your D4 is bone dry then wrap it up and protect it with cling film. If it's exposed then don't do pressure car washes
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Last edited by Deckchair5; 05-02-2011 at 10:10.
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Old 07-02-2011   #9
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Re: Loose connection and Car Security Failure

Hi
thanks for your help. Yes I disconnect D4 before using contact cleaner and hair dryer.
Yes I have top battery cover on. The grey fuse box at the back of the battery I have checked fuses and swaped relays around made sure they where the same as the one I was swaping (good tip use you Phone take pic before swaping fuses and relays).have done brake switch before ?
The car did start once after I got Car Security Failure had to tow it to dealer .The good man at Fiat try his box of tricks no joy he said it could be pick up ring Done that still nothing.So we got 5 fig Code from Fiat ( needed log book for that he tryed that it cuts out the body computer and should start.still no joy.Fiat Man said the ECU not getting the Code?
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Old 08-02-2011   #10
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Re: 04 Stilo keeps going into limp home mode P0220

Update The 5 fig code from Fiat was (42711) may help someone.
I'm still looking for help with Car Security and Loose Connection.
Took battery off to charge today before anyone says I need a new one its not that old and tests fine and removed Grey Fuse Box so I can clean and dry it out in the house Photo may help someone.(if any one needs photo's of D4,fuse box,body computer etc let me know)
Name:  Photo0097.jpg
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Old 08-02-2011   #11
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Re: 04 Stilo keeps going into limp home mode P0220

You need to find the source of this lost connection the car is warning you about.
Click image for larger version

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For car security-immobiliser- then car relies on CAN line communication between body computer and the ECU

Click image for larger version

Name:	body comp  <a href='http://www.fiatforum.com/autolink.php?id=14&script=showthread&forumid=33' target='_blank' class='gal'>jtd</a> 2.JPG
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so a starting point might be to remove all BC connectors, clean with electrical contact cleaner, inspect and refit. Do the same to the ECU connectors

Click image for larger version

Name:	gas pedal wiring  <a href='http://www.fiatforum.com/autolink.php?id=14&script=showthread&forumid=33' target='_blank' class='gal'>jtd</a>.JPG
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You have an ongoing gas pedal circuit problem causing P0220 which is probably a totally separate issue. For that you need to trace whether the 5v supply, earth and signal wiring is good at the ECU from the gas pedal potentiometers. it has two potentiometers so each will have a 5v supply, earth and a signal output moving somewhere between 0.5v to 4.5v as gas pedal is moved and car is saying something is wrong with potentiometer circuit no 2. All supply, earth and signals go through D4 connector but if you check signal voltages at the ECU connectors then you can eliminate D4. People have complained of a a loss of 5v supply to one of the gas pedal pots through an internal circuit problem in the ECU
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Last edited by Deckchair5; 08-02-2011 at 21:44.
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Old 08-02-2011   #12
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Re: 04 Stilo keeps going into limp home mode P0220

Thank you so much Deckchair5. I've got body computer out now not for the first time and had the two ECU connections off other day all looks clean? I have another connection next to D4 looks the same only has 3 pins in it ?I will give it all a good claen and spray with contact cleaner tomorow. Fingers Crossed
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Old 09-02-2011   #13
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Re: 04 Stilo Jtd U1600 Immobilizer Key fault

Update cleaned and put it all back together found a bent pin on the body computer last night was hoping pin 32 ? fixed pin. I,m getting codes P0530(AirCon Pressure Sensor)always had that one P0380(Heater Plug) that was there before Xmas. U1600(Immobilizer Key fault) Still got rid of the P0220 its a start
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Old 09-02-2011   #14
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Re: 04 Stilo keeps going into limp home mode P0220

Ok Good stuff
I'd go to the under bonnet fuse panel and remove each relay one at a time and clean up the terminals and refit

Particularly T9, T10 and T19 as these are the ECU relays
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Old 10-02-2011   #15
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Re: 04 Stilo keeps going into limp home mode P0220

Latest update no joy tried swapping relays got few new one from nice man at fiat dealer must say Windsorís Fiat(Wirral) very helpful. Any more help would be appreciated.
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