The real key figures I can see from the information is the following: Both at approximately 1800rpm. Mass Air Flow (g/s) = 168 with the original MAF position, 65 once changed. Air Flow b1 (g/s) = 5.3 with original MAF position, 21.1 once changed. Air Flow b2 (g/s) = 327.6 with original MAF position, 230.9 once changed. it seems to come on after about 3 miles after driving and it has been diagnosed as fault code P006A. on of the mass air flow metres has now been replaced and the map sensor was not very dirty but cleaned anyway, local land rover dealers cannot book be in for at least 4 weeks and I am a bit stuck, was about to buy a map sensor but didn't want to I'm so glad I found your post, I have the exact same problem you describe here (2000-2200 RPM loss of power) with CAM sensor fault codes on 1998 Land Rover Discovery. Already tried replacing CAM sensor (twice!). I'm new to LR's. Any recommendations for part brands: Bosch, Intermotor, or Standard look like my options? Land Rover Diagnostic Fault Codes List. P0001 fuel dosing, regulator control circuit, open circuit. P0002 fuel dosing, controller control circuit, unstable signal. P0003 fuel dosing, control circuit for the regulator, short to ground. P0004 fuel dosing, regulator control circuit, short circuit to positive. P0005 shut-off solenoid valve, open Diesel TD5: Manifold pressure Circuit fault Logged Low. Inlet air temp Circuit fault Logged Low. Multiplex input Circuit fault Logged Low. 1% reference voltage fault Logged Low. Driver demand 3 fault Logged Low. Ambient pressure Circuit fault Logged Low. ABS: Shuttle valve switch electrical failure. DISCO3.CO.UK - View topic - B1B78-84 System pressure - Signal is below allowable range. Community site dedicated to Discovery 3, 4 LR3 and LR4 Owners and Enthusiasts. Totally free to join - message boards, galleries, wiki, off road events, social meetings. Re: Multiple fault codes, Hazard lights flashing and won't start This is a Ranger Rover Sport. The original fault that shut everything down would sometimes clear itself and it could be started but it would always go back into fault usually by the time 10 minutes was up whether you were driving it or it was just sitting in the driveway idling. The steps to actually dealing with the ABS lights are to; 1. Retreive the ABS Fault codes. 2. Actually fix the broken part of the system. 3. Clear the ABS fault codes. If you are lucky you only have to perform step 2 and the lights may go away. Some faults though are logged and require a reset of the ABS faults. b7Rg.