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Thread: P2288 problems - injector pressure too high

  1. #1
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    P2288 problems - injector pressure too high

    Hi I am having a problem which someone may be able to help out. On a trip the D3 went into limp mode and threw a P2288 code. I could not find any problems so decided to change the HP pump thinking it may be the PCV in the pump. Changed pump and same result, after clearing the fault almost immediately comes back - unless I can get to 80+ km/hr! At around 100 kph runs perfectly until you pull up anywhere then back comes limp and the P2288. Now the puzzle, with the FRP (fuel rail pressure) sensor unplugged the engine runs and the PCV and VCV valves sit happily around 22%. When I plug in the FRP the PCV valve drops to zero or less than 1% AND the P2288 immediately returns. In desperation I replaced the FRP but that did not change anything except my patience.
    Anyone any thoughts?

  2. #2
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    This sounds like a similar problem that occurs with the 4.4 TDV8 which is caused by a bad connection in the harness to the fuel pressure sensor that causes a distortion of the signal. The fix for the 4.4 is to cut out the 2 connector halves and fit a new connector and wiring tail direct to the sensor. I have a new sensor connector for when mines starts playing-up.
    MY12 RRV 4.4 TDV8 AB, +LLAMS, +e-diff, +ACC stop/go. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi

  3. #3
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    Quote Originally Posted by billqut View Post
    Hi I am having a problem which someone may be able to help out. On a trip the D3 went into limp mode and threw a P2288 code. I could not find any problems so decided to change the HP pump thinking it may be the PCV in the pump. Changed pump and same result, after clearing the fault almost immediately comes back - unless I can get to 80+ km/hr! At around 100 kph runs perfectly until you pull up anywhere then back comes limp and the P2288. Now the puzzle, with the FRP (fuel rail pressure) sensor unplugged the engine runs and the PCV and VCV valves sit happily around 22%. When I plug in the FRP the PCV valve drops to zero or less than 1% AND the P2288 immediately returns. In desperation I replaced the FRP but that did not change anything except my patience.
    Anyone any thoughts?
    Tried the simple stuff like changing the fuel filter? I get that fault every now and again (2005 D3) and a new filter sorts it out. In my case it seems like clogging in the filter causes the injector return pressure to get too high (the injector return flow runs back through the filter)
    Shane
    2005 D3 TDV6 loaded to the brim with 4 kids!
    http://www.aulro.com/afvb/members-rides/220914-too-many-defender-write-ups-here-time-d3.html

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