We recently carried out an automatic gearbox ATF flush on a Discovery 3. Today we had a phone call from the owners’ father who has a G4 Challenge Range Rover Sport TDV8 that was rather poorly, not running smoothly and persistently losing power and going into limp mode, there were also other faults relating to parking sensors, sat-nav etc, he wanted to know if we could code read it and diagnose what the fault may be.
A quick test drive confirmed that anything other than a gentle drive resulted in the Range Rover Sport instantly going into limp mode, every warning light on the dashboard lit up like a Christmas Tree, warnings for suspension fault, handbrake fault, transmission fault and engine fault were displayed and the engine would not rev beyond 1000rpm. Turn it off and back on and everything was clear and ran OK until you booted it again.
We plugged in our IID Pro diagnostics tool and read the fault codes. As expected there were a lot!
The main fault codes that were causing the engine to shut down were:
- P2290-00 Injector control pressure too low
- P117D-00 Fuel volume regulator control exceeded maximum control limit
- P000E-22 Fuel volume regulator control exceeded learning limit – General signal failure
- P0087-00 Fuel rail/system pressure – too low
These fault codes do not mean much to most people, but basically, they relate to a fuel supply problem. Initial thoughts pointed to the fuel filter as the prime suspect but the owner said the vehicle had recently been serviced at a local Land Rover specialist garage, so that made us think the problem was something more serious, possibly a faulty in-tank fuel pump. The next step was to get the Sport up on the ramp and investigate further.
Now this is a proper off-road vehicle so we expected to see some mud underneath but there was much more than we were expecting! The transmission undertray was full of mud, that certainly had not been removed for a while! We had to dig a bucket full of mud out of the underneath to get access to the fuel filter which was filthy and showing signs of rust so had not been changed in our opinion for a few years, certainly not during the last service!
A new fuel filter was fitted, faults were cleared and a test drive confirmed that the problem was now gone. The Sport drove like a TDV8 should with more than enough power and torque and that TDV8 was purring away, happy again. Once again the faults were read and unusually for a Land Rover it was completely clear, no faults at all!! Even all the other faults had gone except for the Sat-Nav problem, we suspect this is a problem with the DVD reader, possibly caused by water ingress after a deep water crossing when water was seen inside the vehicle!
All sorted and ready for its next big adventure!