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TurboDiesel2006 · Sep 22nd, 2018, 19:26

Still not fixed.
I have now replaced the EGR valve with a shiny new Pierburg unit (part number 7.00555.06.0). To this I fitted the new Pierburg position sensor (part number 7.00555.07.0) I bought a few weeks back.

When I removed the EGR & Cooler assembly -I'm getting quite experienced at this now but I still seem to loose skin every time- I noted that the cooler butterfly valve would open but seemed a bit stiff to rotate so I cleaned this up and left it to soak in WD40 overnight. By the morning it moved freely when connected to a hand vacuum pump. The bellows assembly also holds the vacuum ok.

I fitted the new assembly to the car, looking forward to seeing all those 185 or so horses that have been awol for several months, but no. No change. The engine system service messages are still there and the car is on low power and feels as if the turbo is missing exactly as it was before I fitted the new EGR valve.

I hooked up the VIDA-DICE and I am still getting the same codes in the Diagnostics tab Unselected CSC.
ECM-4430 EGR Valve, missing signal
ECM-4450 EGR Position Sensor, faulty signal
ECM-4510 EGR Cooler Bypass Valve, signal too low.

If I look at tabs Initial State and Delivery I also get
ECM-683D Turbo control actuator, signal missing
ECM-6500 Engine Pads Signal too low
ECM-6690 Glow relay control signal missing
I assume these are consequences of the EGR problems.

I also tried the VIDA-DICE Activations with the following
EGR Valve - I couldn't hear or see anything happening
EGR Cooler Bypass Actuator - I couldn't see or hear anything
Engine Throttle - I can hear this clicking during the test.

I tried clearing all the codes but they all just came back. I started the car and checked the vehicle Communications>ECM>Activations>Parameters at tick over and when I revved the engine.
ECM-EGR Valve - 100%. This reading was static when the engine was revved
ECM-EGR Valve position sensor - 5.1%. Static as above
ECM-Boost Pressure Actuator - 100%. Static as above
ECM-Throttle position - 91.41%. Static as above
I also tried the swirl valve parameter just to see if anything worked and this increased as I would expect when revving the engine.

I am now stuck. I have fitted a new EGR Valve and Position Sensor, but there is no increase in power, the EGR parameters are still static and I still get the same error codes. I also have the Soot Filter Full message and the DPF error codes but I assume this is because the turbo is not working and when I can get full power and take it for a run these will clear. I have checked the wiring and as far as I can see all the EGR connectors are in place and the wires attached. There no obvious breakages in the wiring and the ECM connectors are firmly in place.

The only part I haven't changed is the EGR Cooler Bypass Valve but if this was faulty and stopping the butterfly valve opening surely the EGR valve would still move. Is there any way to test the Bypass valve?

Any ideas please?

Sep 22nd, 2018, 19:26	#25
TurboDiesel2006 V70 D5 185 Owner Last Online: Apr 15th, 2024 15:25 Join Date: Nov 2014 Location: Ipswich	Still not fixed. I have now replaced the EGR valve with a shiny new Pierburg unit (part number 7.00555.06.0). To this I fitted the new Pierburg position sensor (part number 7.00555.07.0) I bought a few weeks back. When I removed the EGR & Cooler assembly -I'm getting quite experienced at this now but I still seem to loose skin every time- I noted that the cooler butterfly valve would open but seemed a bit stiff to rotate so I cleaned this up and left it to soak in WD40 overnight. By the morning it moved freely when connected to a hand vacuum pump. The bellows assembly also holds the vacuum ok. I fitted the new assembly to the car, looking forward to seeing all those 185 or so horses that have been awol for several months, but no. No change. The engine system service messages are still there and the car is on low power and feels as if the turbo is missing exactly as it was before I fitted the new EGR valve. I hooked up the VIDA-DICE and I am still getting the same codes in the Diagnostics tab Unselected CSC. ECM-4430 EGR Valve, missing signal ECM-4450 EGR Position Sensor, faulty signal ECM-4510 EGR Cooler Bypass Valve, signal too low. If I look at tabs Initial State and Delivery I also get ECM-683D Turbo control actuator, signal missing ECM-6500 Engine Pads Signal too low ECM-6690 Glow relay control signal missing I assume these are consequences of the EGR problems. I also tried the VIDA-DICE Activations with the following EGR Valve - I couldn't hear or see anything happening EGR Cooler Bypass Actuator - I couldn't see or hear anything Engine Throttle - I can hear this clicking during the test. I tried clearing all the codes but they all just came back. I started the car and checked the vehicle Communications>ECM>Activations>Parameters at tick over and when I revved the engine. ECM-EGR Valve - 100%. This reading was static when the engine was revved ECM-EGR Valve position sensor - 5.1%. Static as above ECM-Boost Pressure Actuator - 100%. Static as above ECM-Throttle position - 91.41%. Static as above I also tried the swirl valve parameter just to see if anything worked and this increased as I would expect when revving the engine. I am now stuck. I have fitted a new EGR Valve and Position Sensor, but there is no increase in power, the EGR parameters are still static and I still get the same error codes. I also have the Soot Filter Full message and the DPF error codes but I assume this is because the turbo is not working and when I can get full power and take it for a run these will clear. I have checked the wiring and as far as I can see all the EGR connectors are in place and the wires attached. There no obvious breakages in the wiring and the ECM connectors are firmly in place. The only part I haven't changed is the EGR Cooler Bypass Valve but if this was faulty and stopping the butterfly valve opening surely the EGR valve would still move. Is there any way to test the Bypass valve? Any ideas please?