Hello Everyone.
my 2006 XC70 has decided to start having some major problems. i'm trying to research as best i can but thought a post on here was in order to see if any of you helpful folk have any advice as i'm not a mechanic.
symptoms:
yesterday driving along, red warning triangle came up + brake failure stop safely message, split second later both speedo and rev counter went to zero (whilst still moving) trip counter turned to dashes. the engine was still running, brakes worked and it drove ok, although if i dropped the clutch it seemed clunky.
i pulled over, turned the engine off, then attempted to restart - nothing.. didnt turn over or anything. waited about 10 minutes and tried again, got message "immobiliser check manual" it would turn the engine over but wouldn't start. waited another few mins then it started and i could drive again. few seconds later the same error and loss of dials. I reached my destination.
30 mins later had to head home, car started fine but brake message came up straight away. rev counter worked but speedo didn't, drove home only few miles, no speedo and couldnt engage 5th or 6th gear so 4th max i could go (manual gearbox).
today plugged into vida, had a host of codes (listed them below) i took note of them and cleared them, then took it out and was fine no errors, drove around the block couple of times couldnt replicate it at all. 5th and 6th gear engaged as normal. took note of remaining codes.
this evening thought i'd try use it again, started it and straight away the red triangle but no message this time, didn't try to drive it just plugged into vida and got the codes.
after researching it seems to be a communications / electrical issue somewhere. i've spotted a few threads on here with very similar symptoms but never a resolution. not even had this car a year, done very little driving (about 3k miles) and its starting to look like a money pit
since i've had it it has had the anti lock service required message, because the DEM is shot, i've not bothered to fix this and just been using it in 2 wheel drive, could the DEM cause this? or could it be the BCM thats shot or the CAN fibre network broken somehow,
so the codes:
First reading after the first incident:
BCM-0094 Communication between control units Communication problems with DEM
BCM-0095 Communication between control units Communication problems with DEM
BCM-0115 Communication between control units Communication problems with SAS, signal missing
BCM-E000 Communication between control units Communication problems
CCM-0040 Air quality sensor internal fault
DEM-0006 Pump faulty signal
DEM-000A Power supply faulty voltage
ECM-2850 Heated oxygen sensor (HO2S) - Signal too high
ECM-28E0 Heated oxygen sensor (HO2S) - Signal too high
BCM-0100 Communication between control units Communication problems with ECM
BCM-0148 Communication between control units Wrong configuration ID
CEM-1A59 Communication with AUM control module signal missing
CEM-1A5F Communication with BCM control module signal missing
CEM-1A62 Communication with ECM control module signal missing
CEM-DF17 CAN-H high speed network faulty signal
CEM-E000 Communication with control module faulty signal
ECM-1100 Ambient temperature sensor - faulty signal
ECM-580F Configuration fault - Signal missing
ECM-6661 Glow relay control - faulty signal
ECM-6662 Glow relay control - faulty signal
ECM-6663 Glow relay control - faulty signal
ECM-6665 Glow relay control - faulty signal
ECM-7700 Engine control module (ECM) - Incorrect check sum
ECM-E000 Control module communication - signal missing
SAS-E000 Control module communication faulty communication
Cleared the codes, then following showed up
BCM-0095 Communication between control units Communication problems with DEM
CCM-0040 Air quality sensor internal fault
DEM-0006 Pump faulty signal
ECM-2850 Heated oxygen sensor (HO2S) - Signal too high
ECM-6661 Glow relay control - faulty signal
ECM-6662 Glow relay control - faulty signal
ECM-6663 Glow relay control - faulty signal
CEM-1A59 Communication with AUM control module signal missing
took it for the drive around the block, no issues, got back turned it off and on and cleared codes again and got following on fresh read:
BCM-0095 Communication between control units Communication problems with DEM
CCM-0040 Air quality sensor internal fault
CEM-1A59 Communication with AUM control module signal missing
DEM-0006 Pump faulty signal
ECM-2850 Heated oxygen sensor (HO2S) - Signal too high
ECM-6661 Glow relay control - faulty signal
ECM-6662 Glow relay control - faulty signal
ECM-6663 Glow relay control - faulty signal
ECM-940F Brake pedal sensor - faulty signal
SAS-E000 Control module communication faulty communication
then tonight when was going to use it but error came back this was the readout
BCM-0094 Communication between control units Communication problems with DEM
BCM-0095 Communication between control units Communication problems with DEM
BCM-0115 Communication between control units Communication problems with SAS, signal missing
BCM-0148 Communication between control units Wrong configuration ID
BCM-E000 Communication between control units Communication problems
CEM-1A59 Communication with AUM control module signal missing
DEM-0006 Pump faulty signal
ECM-2850 Heated oxygen sensor (HO2S) - Signal too high
ECM-940F Brake pedal sensor - faulty signal
CCM-0040 Air quality sensor internal fault
CEM-1A5F Communication with BCM control module signal missing
CEM-DF17 CAN-H high speed network faulty signal
ECM-6661 Glow relay control - faulty signal
ECM-6662 Glow relay control - faulty signal
ECM-6663 Glow relay control - faulty signal
SAS-E000 Control module communication faulty communication
its much more complex than i realised this car, wish i'd bought an older less electronic car now bloody nightmare.