Had a oil leak and low oil pressure MIL on as well as the limp-mode ½ engine power MIL.

So obvious solution was repair the leak. And clear DTC's.
Put in a new oil housing as the OEM had a hairline crack above the bottom bolt. This fixed the oil leak and MIL, but I still get the limp-mode solid MIL.... but here's the odd part.

So start the vehicle, no MIL or DTC errors. (Aside from the TPMS, aftermarket wheels).

Begin driving after 2 blocks the limp-mode indicator illuminates. Stop, turn off the engine, then start then engine, no limp-mode no MIL, no DTC's....
Drive two blocks and the limp-mode icon reappears....

So since it's not saving a DTC and the MIL limp-mode indicator only appears after driving I check the errors when it appears..... but the reader states no fault codes stored.

So thinking it's possibly the reader I'm using as at this time I was using the Bluetooth torque OBDii app. So i repeated the process with two different foxwell readers. Both ran into the same issue. No faults.... But there's a catch, I get no fuel pressure readings on all three devices.

So on this journey I just start replacing parts. I start by checking all connectors to ensure no corrosion, and securely fastened.
1. FRP sensor, still no data readings
Test the continuity FRP connector 5v/0v/5v
(wtf!!! at a loss)
Then to address the stuttering:
1. Plugs
2. Coils
3. Boost vac valve
4. Turbo Diverter
5. (Both) VVT solenoids
..... still get a few slight stutters, nothing as bad as it had been.

*note* Stutter only occurs while accelerating, it'll idle smooth and cruise/coast smooth.

So thats my mini problem, if anyone has run into a similar issue I'd appreciate the learning experience.

 

So as previously stated, I had checked continuity of the socket with readings 5v/0v/5v but still was not getting signal to the sensor.

But have now somewhat found the issue, from reading other threads on the forum similar problems were caused by shorts in the harness, so as I was testing again I had repositioned the harness to different spots and finally noticed the readings changed 5v/2.4v/5v. And so obviously the (common/ ground/ earth/ negative), by which ever name one would choose to use, is picking up signal.

The wireharness is the culprit. Now I'll have to trace the negative back to the break point where it's making a positive contact.

 

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