[Melkazen]

Not a clue ,, So the sensor you replaced was for original fault, and the original sensor showed two faults, and now its showing the 1 fault ??????????????

Hi, at first it came up with these 2 codes. DF998 and DF651, I figured out the 651 is the pressure sensor, which I bought the part and replaced it myself, clearing both those codes, however, 651 is the pressure sensor as an assembly in it, the pressure sensor circuit voltage outside upper limit was on as well initially. The 2 errors cleared but now I’m left with a DTC for the voltage. The symptoms of my van is loss of power at revs while driving, but not always so is still functional. Before changing the sensor l, the engine would suddenly stop while driving but rarely. The check injection and check emissions errors show in the dash.

 

[Melkazen]

Both of the DF codes are for the pressure sensor =
First code DF 998 - Turbine Upstream Pressure
Second code DF 651 (0470) Turbine upstream pressure sensor circuit

This replaced Sensor Genuine or?

Yes the new sensor is Bosch, same as the old one, bought by part number that was on it.
Couldn’t remember if the 2 codes were related, but yes, the one for the sensor reading cleared, now just the voltage that goes into it is at 1.19V and oscillating by revs up to 2V. Now is there any way I can change the voltage output from ECU? Or what’s actually going on? I can’t find any plugs that seem blown up, and if there were I’m sure some other codes would show up too, but there’s nothing else there.

 

[Melkazen]

I wonder if there could be a pressure blockage? 🤔 like the pipe/space getting the pressure to the sensor, as like I said the pressure reading isn’t oscillating and it should at revving 🤔 I’d think

 

[Melkazen]

Just a bit over 1000psi but is not moving neither up or down

 

[Melkazen]

The metal pipe from manifold to sensor will be blocked. Quite a common issue nowadays.

Something I could do myself? Unblocking it?