Originally Posted by
ross@freshres.com.au
Getting intermittent Transmission Fault error then Reduced Performance error. Can usually override error by turning engine on/off but a few hours outside Alice Springs enroute to Perth needed to limp back to Alice Springs at 10-30km per hour to Land Rover Dealer. Two errors detected - P2290 Injection Control and P0191 Fuel Rail Pressure. Dealer found 'intake valve sweating' and replaced Intercooler Hose. Managed to get back to Perth but same error continues to occur intermittently over last 3 months since then.
Bought myself an ArtiDiag 100 Topcon diagnostic tool and and found several errors:
* U0402-68 Power Control Module. Invalid data received from transmission control module - intermittent PCM
* P0087-00 Fuel rail/system too low - intermittent PCM
Perth dealer says high and low pressure fuel pumps need replacing (expensive - ouch!!) and clean out fuel tank but cant guarantee a fix. Note: about 200,000kms ago I have twice filled up with unleaded and driven vehicle to stop. Fuel pumps were not replaced after this. Vehicle now traveled 250,000kms).
Added JLM extreme clean to fuel in attempt to flush fuel pumps. Errors persist. Drove in Sports Mode. Errors persist.
I'm not mechanically minded. Any ideas would be appreciated. Ross
Hi Ross,
the following was a post I made in November 2017, with scary similarities to your situation.
"We had a similar problem when travelling from Perth to Alice Springs via the Great Central Road in August this year. Travelling up to Empress Spring, two warnings flashed up on the dash - Gearbox Fault followed immediately by Reduced Engine performance.
U2023 - Gearbox - control module network signal calibration data
P0087 - Engine Management - Fuel rail/system pressure - too low
Like yours this was an intermittent fault and we couldn't replicate the conditions that 'made it occur' and like yours, it was reset by turning the engine on and off, however the last straw was when the issue reoccurred 10 times in the 200km between Erldunda and Alice Springs - too much to ignore.
A call to PCB Landrover Independent Specialists in Adelaide pointed the finger at fuel issues - (blocked fuel filter confirmed and replaced by Sutton Motors in Alice Springs), Low Pressure Fuel Pump (flow tested OK by Sutton Motors), dirty fuel drained from tank by Sutton Motors leaving the HPFP as a possibility but unable to be replaced because of Sutton's work schedules in the week following. In going as far as they did I'd have to say Sutton Motors were very helpful in the process. However like yours, addressing the lower cost issues appeared to solve the issue in all the road testing conducted by Sutton Motors and ourselves, only to have them reappear approx 250km later as we headed south. The D4 and Camper Trailer were trucked back to Adelaide and the two of us flown home courtesy of a RAA Platinum membership - brilliant service by RAA.
Further assessment by PCB at home (flow rates for the LPFP still OK, new fuel filter) saw the HPFP and associated drive belts replaced in early Oct ($2300 HPFP and drive belt, plus 6.5 hours labour). We've since driven approx 5000km, including a trip to the east coast and back to Adelaide via the Vic High Country and Otway Ranges, and the faults have not reoccurred. Confidence is returning.
Notwithstanding the Gearbox Fault warning, we never had any issues with the gearbox. It seems this warning was possibly a transferred fault triggered as a result of the ECU registering the low fuel rail pressure.
Fuel Injectors seem to be unaffected.
Hope this helps"
That was posted in November 2017, now having travelled a 40,000km since the repair we've had no further issues.
Sorry looks like you might be up for a HPFP replacement.
Craig
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