Hi all, I’m helping a friend revive a severely neglected and abused 2012 1.6 diesel with a DV6C engine.

We have slowly been working through a list of faults/problems.

I looks like it’s been run for a long time with a P0299 fault causing the DPF to become blocked.

The DPF has been professionally cleaned an refitted.

I found a severed vacuum line to the boost controller by the oil filter which is now fixed and the boost controller is now getting vacuum.

Turbo actuator rod responds to vacuum applied by a mytivac and holds vacuum

P0299 is no longer present.

What I am getting now is P0237 turbo boost sensor A circuit low and P02E8 intake Air Flow A position sensor circuit low..

Its had a replacement TMAP sensor and I’ve checked the wiring to it.

On live data I can get the temperature element of the sensor to respond to a quick waft with a hot air gun.

The problem is with the pressure readings from the TMAP which show 29kpa with key on engine off and with the engine running.

If I disconnect the plug to the TMAP I see a reading of 255kpa 

The replacement sensor is not Ford but from Euro.

Found the original Ford sensor in the boot and tried it and it gives the same readings.

So with this code we are getting no boost.

Ive had a quick look at the turbo/intake pipe work and it seems ok but haven’t removed them yet to check for splits but…..

Am I correct in thinking I should see about 100kpa from the TMAP sensor when on idle, then some variation when revved as the turbo kicks in?

This is what I get with other cars I have at home or do Fords do it differently?

Any suggestions on what to look for next?

 

 

 

The Map Sensor should read around 100kPa at Idle or even with just the Ignition on and given that the other code seems to relate to the Throttle Valve, which is in the same area and probably the same Loom then there is a strong possibility that the Wiring has become damaged somewhere and it could be anywhere.

If that Loom goes under the Battery Tray then that would be my starting point unless there was any other obvious place that looks bad. Battery Acid can leak.

Hi thanks for the response.

Yes I thought that too, they don’t seem to share any wiring looking at the excellent diagram found on this site but as you say they would share the same path in the loom.

I’ve had the air box out and exposed the wiring down to the ECU and I get continuity in the wires, also I get the change from 29kpa to 255kpa when I unplug the sensor which makes me think the ECU is getting the message…. Just the wrong message!

Would I be correct in thinking these two figures 29 and 255 kpa represent the upper and lower limits of the sensor?

 

 

 

20 minutes ago, Mowcopds said:

Would I be correct in thinking these two figures 29 and 255 kpa represent the upper and lower limits of the sensor?

I don't know.

There may be Voltage reading for these Sensors as well and a position reading for the Throttle Valve.

I suppose it is possible that the new sensor is faulty.

I hate replacing sensors without evidence that the old one is faulty but I may have to bite the bullet and get a genuine Ford item.

But first I will check out the wiring again.

Did you manage to resolve this, OP? My focus with the same engine has been giving a P02E8 code and I’ve read it can be resolved by either replacing the MAF or MAP sensor. I’ve replaced the MAF and cleared the codes and nothing has come back since so hopefully that’s fixed. I also read the MAP and the reader I was using showed 29.8 inHg, which converts to 100.9kPa. Could your reader have been showing the same units as mine?

19 minutes ago, johnwest said:

Did you manage to resolve this, OP?