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#1 | ||
Regular Member
Join Date: May 2010
Location: Perth
Posts: 48
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Hi guys,
I'm not quite sure what to put in the title as it's a few things that I'm having trouble with. I was driving on the freeway in Perth today and suddenly a few warnings came up on my dashboard: Speed Limited Mode, Engine Systems Fault, Transmission Malfunction, Power Steering Fault. I pulled the following fault codes using the Torque App and an ODB2: U1900 - Network, P0571 - Powertrain, Cruise Control/Brake Switch A circuit, P2121 - Powertrain - Throttle Pedal Position Sensor/Switch D circuit range/performance U1900 Network I went back home and disconnected the battery for 30 minutes then connected again. I drove on the freeway again and was going to a friend's house who is more mechanically inclined than I am. It then came up with: P0231 Powertrain - Fuel Pump Secondary Circuit Low, P0571 again P2121 again U0073 - Network U1900 again U2012 - Network U2197 - Network U2200 - Network I lost my rpm and speedometer and also fuel and battery levels, all went to 0 (fuel and battery a bit slower of course), with all my warning icons. Went away again, with messages as before. I lost power steering this time. Gauges all fixed themselves and power steering returned. Happened a few more times. My friend and I did some test driving, and we thought it might either be the throttle sensor, instrument cluster, or the ECU/PCM ? Any assistance would be greatly appreciated, as I'm hoping to fix this myself, as I'm not in a good spot with work at the moment, casual jobs only, and hoping to be able to fix it myself, but will take it to Ford or RAC if I have to. On the drive home on the freeway, all was ok.. but driving around my friend's house, the dashboard constantly conked out several times driving under 60km etc. |
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#2 | ||
Chairman & Administrator
![]() ![]() Join Date: Dec 2004
Location: 1975
Posts: 106,999
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I can help decode them and suggest some diagnostics.
P0231 is low voltage on the fuel pump circuit. The PCM monitors the fuel pump monitor. The test fails if the PCM commands the fuel pump ON and B+ voltage is not detected on the FPM circuit. Possible causes: Open B+ circuit to the fuel pump relay Open FP PWR circuit between the fuel pump relay and its connection to the FPM circuit Damaged fuel pump Damaged PCM (engine will start) Pinpoint Tests
P0571 is a brake switch plausibility error. This DTC sets when the brake switch does not toggle during the key ON engine running (KOER) test. Possible causes: BPP circuit open BPP circuit short to ground Concern in modules connected to the BPP circuit Damaged brake switch Incorrectly adjusted brake switch I don't have a listing for P2121 in the PCED reference. Given the rest of the symptoms you are describing I suspect an electrical fault in the wiring somewhere that is of a major nature or a faulty PCM - although the latter would tend to throw a lot of other DTC's as well and the U codes lead me to believe it's probably in the CANBUS wiring.
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Observatio Facta Rotae
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#3 | ||
Regular Member
Join Date: May 2010
Location: Perth
Posts: 48
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Thanks for your response. How would I go about testing the wiring to the PCM?
What would Ford charge for something like this? I've got a feeling it's going to be very expensive and time consuming.. would RAC have a good idea or diagnostics and repair for it or Automasters etc or is it best to take it to Ford? |
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#4 | ||
Regular Member
Join Date: May 2010
Location: Perth
Posts: 48
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As I was leaving a friend's house this afternoon, the faults came up again, I hit the top of my dashboard and it fixed it. After I got home, I removed the instrument cluster pulled it apart and sprayed it with contact cleaner and installed it again. Drove 50km tonight on the freeway to test it and so far, no faults... fingers crossed
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#5 | ||
Chairman & Administrator
![]() ![]() Join Date: Dec 2004
Location: 1975
Posts: 106,999
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Hope it does fix it - seems likely that it might have been a bad earth or a bad contact somewhere in the cluster but I guess you'll never know.
__________________
Observatio Facta Rotae
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#6 | ||
Regular Member
Join Date: May 2010
Location: Perth
Posts: 48
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Started having issues again the last few days but not as bad. Seems to be the heat. Trying to find a replacement cluster. Any idea how to program them to set the value for the odometer?
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#7 | ||
FF.Com.Au Hardcore
Join Date: Jul 2008
Location: Melbourne
Posts: 804
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confess I thought the Body Computer module retained that information but could be wrong
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#8 | ||
Regular Member
Join Date: Mar 2007
Posts: 42
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Numloxx, Heres 2 vids you may find useful about repairing dry joints in the soldering of usually the BUS connectors in these dashes....
https://www.youtube.com/watch?v=ei7JguJ0apE https://www.youtube.com/watch?v=Ldm8ByHp5lE cya falcon95 |
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#9 | ||
Regular Member
Join Date: May 2010
Location: Perth
Posts: 48
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Thanks. Yeah I have seen that first video before, this is how I learnt how to open it up etc. I suppose I could just buy a new unit (2nd hand) and plug it in to see what happens. I've heard that codes for the keys might be stored in there too?
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#10 | ||
Starter Motor
Join Date: May 2018
Posts: 2
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sorry to hijack this but my daughter has a Focus LV 2011.....
and its having the same issues P0460,P2121,P2122,B1318,B1204,B1868, and C1750 I reckon the cluster requires replacement.....
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Ford Mondeo 2011 Zetec Auto Diesel Wagon Ford Focus 2013 LX 2.0 Auto (kid 1) Ford Focus 2007 CL 2.0 Manual (kid2) |
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#11 | ||
Regular Member
Join Date: May 2010
Location: Perth
Posts: 48
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Remove the cluster, open it up, spray it with contact cleaner, if it fixes it for a while then it's stuffed. I had to solder the connectors again because spraying it didn't work.. still ok after 200km, but if it occurs again I'll buy a 2nd hand unit.
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#12 | ||
Regular Member
Join Date: May 2010
Location: Perth
Posts: 48
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2 years later and still no issues. The connector to the instrument cluster needed a good solder reflow and that fixed the issues. I think it came up 1 or 2 more times since, but other than that it's been good. Got a feeling it's heat related.
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#13 | ||
290v
Join Date: Feb 2007
Location: Adelaide
Posts: 1,219
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my daughters had problems like this was going to change cluster but on inspection of the fuse box under the glove box there is two plugs and my grand-daughter had knocked one loose when she drove everything was good. but all of a sudden everything stopped working again codes would be coming up on the scan tool so before you start look at the two big white plugs on the fuse panel under the dash if you have them
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BA GT 2003 Silhouette 4 Speed Auto |
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#14 | ||
Regular Member
Join Date: Aug 2013
Posts: 89
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Hi, it sounds like it could be similar to a fault I had, various faults come up on dash and a no start. I could hit dash and it would start. I traced the problem to cracked soldered joints on the back of the dash. YouTube it, it’s very common. Hope this helps
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#15 | |||
Regular Member
Join Date: May 2010
Location: Perth
Posts: 48
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Quote:
The random fault codes were due to data corruption. Dry solder joints on the cluster pcb connector. I reflowed the solder and all was good. Has come up again once a few years ago, but nothing since. |
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