HI All,
Bit of a long shot but I'm experiencing a strange fault when accelerating gently at speeds of 40mph plus and I was wondering if anyone else has had a similar problem.
Quick summary. Bought car for next to nothing, replaced lots of bits to get it through mot. Drove fine for approximately 1000 miles and then started playing up.
My car is a 2012 2.0 TDCi 140bhp (DW10C) I believe and what happens is this.
Cruising along at 60mph in 6th seems to be the most common time for it to occur if I gently push the accelerator (to overtake a lorry) for example
I get engine malfunction flash up on dash, esp light illuminates or flashes and car goes into reduced power mode for a short time (maybe 15-20 seconds). In this short time gradually power is restored and it starts driving normal again.
Each time it happens I have scanned it with Forscan and I get one persistent code as follows.
DTC's in ABS: U0401:68-48
Detail U0401 - Invalid Data Received from ECM/PCM A
Silly as it sounds I was aware that I had the wrong size tyres on (taken from my MK3) at 205/50/17 when they should have been 215/50/17's and according to a similar problem some guy had with a focus online I decided to invest just north of £600 in some 18" CMS alloys and what I believe to be the correct 235/40/18's in the very vague hope it may make a difference. Alas, it did not. In fact if anything it has made it worse. Once straight away whilst joining the dual carriageway and then 3 consecutive times the following morning.
Other codes I have seen although I would have thought are not necessarily related to this issue are
P1168: Fuel pressure sensor in range but low.
P1169: Fuel pressure sensor in range but high
P0135 - O2 Sensor Heater Circuit (Bank 1 Sensor 1) Circuit short to ground
The reason I am discounting these is that they seem to show up regardless of the engine malfunction/limp mode issue or not. ( I reset them after every scan)
I also noticed there are bubbles in the fuel line going into the high pressure pump so I'm guessing the first 2 could probably be solved by sorting that.
I did buy and fit a second hand fuel rail and pipes due to a blown injector seal making a nice gunky mess of them (something I found after I bought the car) I also had to disconnect the fuel pipes on the left hand side to change the top engine mount and noticed what appeared to be gaffer tape where the pipes join. Maybe the pressure switch on the fuel rail could be suspect. Maybe air getting into the fuel line is the culprit.
Also seen the following errors but just the once and to be fair I think it was because I had the HS/MS switch in the wrong position.
B112B: Steering Wheel Module - Mechanical Failures
U0126 Lost communication with steering angle sensor module
U0151 Lost communication with Restraints control module
U0140 Lost communication with Body control module
P1607 - MIL output circuit - Missing Message
U0010 - Medium speed CAN communication Bus
U0200 - Lost communication with door control module B
I was thinking maybe I have a dodgy ABS module connection either in the engine bay or where it presumably connects to the BCM behind the glove box. I did change the cabin filter which was a pig. Maybe I've disturbed something there?
The only reason I have my doubts is that whenever this happens I'm only cruising on a nice smooth road. I drive on plenty of bumpy roads where I live and it's never done it once, only ever on the fast roads.
The car has done 210K which I know is a lot and I would consider buying a recon engine but I'm just not convinced this is an engine issue so why splash out that much case only to have the problem remain? She starts on the button and purrs now thanks to the new leak off pipes (that's another story) so I'm fairly happy that she has some more life left in her. I will be getting the timing belt and water pump changed if I can solve this issue as there is no history and if you read my diary (coming soon) you will see that the poor girl appears to have been pretty mistreated in her short life service wise.
If anyone has any idea what could be going on I would really appreciate the input.
Thanks in advance,
Mark
Bit of a long shot but I'm experiencing a strange fault when accelerating gently at speeds of 40mph plus and I was wondering if anyone else has had a similar problem.
Quick summary. Bought car for next to nothing, replaced lots of bits to get it through mot. Drove fine for approximately 1000 miles and then started playing up.
My car is a 2012 2.0 TDCi 140bhp (DW10C) I believe and what happens is this.
Cruising along at 60mph in 6th seems to be the most common time for it to occur if I gently push the accelerator (to overtake a lorry) for example
I get engine malfunction flash up on dash, esp light illuminates or flashes and car goes into reduced power mode for a short time (maybe 15-20 seconds). In this short time gradually power is restored and it starts driving normal again.
Each time it happens I have scanned it with Forscan and I get one persistent code as follows.
DTC's in ABS: U0401:68-48
Detail U0401 - Invalid Data Received from ECM/PCM A
Silly as it sounds I was aware that I had the wrong size tyres on (taken from my MK3) at 205/50/17 when they should have been 215/50/17's and according to a similar problem some guy had with a focus online I decided to invest just north of £600 in some 18" CMS alloys and what I believe to be the correct 235/40/18's in the very vague hope it may make a difference. Alas, it did not. In fact if anything it has made it worse. Once straight away whilst joining the dual carriageway and then 3 consecutive times the following morning.
Other codes I have seen although I would have thought are not necessarily related to this issue are
P1168: Fuel pressure sensor in range but low.
P1169: Fuel pressure sensor in range but high
P0135 - O2 Sensor Heater Circuit (Bank 1 Sensor 1) Circuit short to ground
The reason I am discounting these is that they seem to show up regardless of the engine malfunction/limp mode issue or not. ( I reset them after every scan)
I also noticed there are bubbles in the fuel line going into the high pressure pump so I'm guessing the first 2 could probably be solved by sorting that.
I did buy and fit a second hand fuel rail and pipes due to a blown injector seal making a nice gunky mess of them (something I found after I bought the car) I also had to disconnect the fuel pipes on the left hand side to change the top engine mount and noticed what appeared to be gaffer tape where the pipes join. Maybe the pressure switch on the fuel rail could be suspect. Maybe air getting into the fuel line is the culprit.
Also seen the following errors but just the once and to be fair I think it was because I had the HS/MS switch in the wrong position.
B112B: Steering Wheel Module - Mechanical Failures
U0126 Lost communication with steering angle sensor module
U0151 Lost communication with Restraints control module
U0140 Lost communication with Body control module
P1607 - MIL output circuit - Missing Message
U0010 - Medium speed CAN communication Bus
U0200 - Lost communication with door control module B
I was thinking maybe I have a dodgy ABS module connection either in the engine bay or where it presumably connects to the BCM behind the glove box. I did change the cabin filter which was a pig. Maybe I've disturbed something there?
The only reason I have my doubts is that whenever this happens I'm only cruising on a nice smooth road. I drive on plenty of bumpy roads where I live and it's never done it once, only ever on the fast roads.
The car has done 210K which I know is a lot and I would consider buying a recon engine but I'm just not convinced this is an engine issue so why splash out that much case only to have the problem remain? She starts on the button and purrs now thanks to the new leak off pipes (that's another story) so I'm fairly happy that she has some more life left in her. I will be getting the timing belt and water pump changed if I can solve this issue as there is no history and if you read my diary (coming soon) you will see that the poor girl appears to have been pretty mistreated in her short life service wise.
If anyone has any idea what could be going on I would really appreciate the input.
Thanks in advance,
Mark