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Thread: Fault code P2263-22: Turbo System

  1. #1
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    Fault code P2263-22: Turbo System

    Above fault code 3 times recently when towing. 'Restricted Performance" lights up but MIL does not. Just cleared the fault and continued driving and after the 3rd clearance no further occurrence for the remainder of the trip, ~3 hours.

    Gap tool says - "Turbo/supercharge boost system performance - General signal failure - signal amplitude>maximum". No other faults are logged.

    That fault code is not documented in the D4 workshop manual but is refereed to in another document specific to the 3.0l engine on board diagnostics system where is says: "P2263-22 Unable to control to desired boost pressure - Boost pressure governor deviation"

    My interpretation is something is putting out a signal that is impossible to be acted on. If so I would expect to see signal plausibility faults also but don't.

    Looking at the live valves from both turbos (at home the day after the events without the camper in tow) the turbo actuators are moving to their commanded positions and corresponding MAF air flows appear to respond to changes in turbo actuator command locations indicating they are really moving.

    Anybody got any ideas on where to start chasing this down.
    2011 D4 3.0 SDV6
    1999 D2 V8, in heaven
    1984 RRC, in hell

  2. #2
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    Could it be a dirty sensor plug?
    "Land Rover - making mechanics out of everyday motorists for nearly 70 years"

  3. #3
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    Could be. Problem with some fault codes is there does not seem to be much documentation I can find which outlines what logic triggers them so you can narrow it to the specific sensors involved in the fault condition.

    The actual fault code seems to be generic to a number of different engines and manufacturers, not just Landrover.
    2011 D4 3.0 SDV6
    1999 D2 V8, in heaven
    1984 RRC, in hell

  4. #4
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    This is from the BAS website - may help.

    P2263 – BAS Remaps, Powering the Landrover tuning world!

  5. #5
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    Thanks had not specifically seen that reference. Have cleaned MAP and intake temp sensors and electrical connectors. I think judging by some oil / dust build up where the throttle body joins the air intake body there may be a leak at the junction of the 2 plastic housing also. Will need to have a closer look at that.
    2011 D4 3.0 SDV6
    1999 D2 V8, in heaven
    1984 RRC, in hell

  6. #6
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    Could be a crack in the inlet manifold just starting or some other leak in the inlet system. The boost pressure doesn't get high enough due to the leak and triggers an error.

    Mine started like yours but then got to the stage where every time the second turbo cut in the engine went to restricted performance. If that happens manually changing gears before 2500rpm will keep the engine out of restricted performance for a while longer.
    Bob

    2010 D4 3.0TDV6 SE, ediff, LLAMS, 5 x GOE wheels, LT285/60R18 BFG K02's, GOE Compressor Guard, LR Tank, Mitch Hitch, ECB Bull Bar, Kaymar Rear Bar, Traxide, Safari Snorkel.
    2013 Range Rover Vogue TDV6
    2017 Disco Sport SE 132kW Ingenium

  7. #7
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    Quote Originally Posted by Ferret View Post
    Thanks had not specifically seen that reference. Have cleaned MAP and intake temp sensors and electrical connectors. I think judging by some oil / dust build up where the throttle body joins the air intake body there may be a leak at the junction of the 2 plastic housing also. Will need to have a closer look at that.
    My throttle body split at the join where the y piece is. Another place worth checking. Smoke test is the best bet to find the leak if there is one
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)

  8. #8
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    How is a smoke test done?
    2011 D4 3.0 SDV6
    1999 D2 V8, in heaven
    1984 RRC, in hell

  9. #9
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    Quote Originally Posted by Ferret View Post
    How is a smoke test done?
    You pressurise the intake system with a smoke machine and watch for where the smoke leaks from.

    You can improvise your own smoke machine with the help of google.

    I used an air compressor pushing air through a tin where I burnt a mosquito coil for my smoke. The outlet of the can went into the intake. I took off the intake pipe and improvised a blockage using the plastic lid from a can of degreaser.
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)

  10. #10
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    Great smoke machine DiscoJeffster! Did you heat the mozzie coil from underneath or just light it and bang the lid on?

    The best "on the fly" adapter to the intake I've seen is a latex glove with a finger cut off for the small hose and the wrist part taped around the Intake pipe, it shows the pressure well too.

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