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  1. Bench programming Bosch Motronic 5.2.1 from P38a?

    Range Rover Mark II / P38
    Based on my research so far: P38 with Thor engine use Bosch Motronic 5.2.1 ECU. A very similar ECU is commonly found on various BMWs of the same vintage, E38 and E39 come to mind. The ECU uses DS2 serial protocol for diagnostics. The protocol is well known and documentation is available...
  2. 4.6 Motronic - won't start after dead/new battery

    Range Rover Mark II / P38
    Hi all, really hoping someone on here can help me as I'm running out of ideas. I'm pretty new to the P38 and clearly don't know what I'm doing. The source of frustration is a 2002 Motronic 4.6. Went on holiday for three weeks, came back to a dead battery which wouldn't charge with my Optimate...
  3. Nanocom Motronic immobilization code: 3-digit or 4-digit?

    Range Rover Mark II / P38
    My 2000 Range Rover (US model) lost ECU-BECM sync (P1674 at each start attempt) within the first few hours of me owning it, and I'm thousands of miles from a dealer. I have a Nanocom. However, in the Motronic menu, the Nanocom shows the immobilization code is 2150, while in the Alarm menu, it...
  4. 1999 HSE 4,6 Motronic: 4HP24Gearbox fault, P0722 and P1884.

    Range Rover Mark II / P38
    Gentleman! I need Your help. I've been reading this forum lake a maniac lately, though I've found no answer for the problem I have, now to the point: When bought, the car was spilling oil from breather tube, probably overfilled, exchanged oil and filter, now no problems with that. From the...
  5. P38 4.6 Motronic - Cold weather faults - Please Advise P0123,P0172, PO175

    Range Rover Mark II / P38
    P38 4.6 Motronic - Cold weather faults - Please Advise P0123,P0172, PO175 Good Morning all, It has been unusually cold here and it seems to be getting the best of my old P38. This morning she was bucking and hesitating very hard when driving off to work. It has happened before in sub zero when...
  6. Engine Hiccuping P38? 2001 Motronic

    Range Rover Mark II / P38
    Hi all, Have an interesting, random issue with my 2001 Vogue... only has happened on a couple of trips, once she's been up and running for a fairly long time - both times after over an hour of solid, hassle free driving. Both journeys where I've experienced this were mostly high speed...
  7. Rich fuel mixture - how to check Motronic?

    Range Rover Mark II / P38
    Anyone comfortable with the workings of Motronic engine management? I have a '99 P38 with Bosch engine, special export model without oxygen sensors. The fuel consumption is beyond reasonable: 1 liter in 3 km (7 miles/ gallon). It has all the signs of a very rich fuel mixture: black smoke, two...
  8. Some interesting info on the Motronic / Bosch engine management system.

    Range Rover Mark II / P38
    Some interesting info on the Motronic / Bosch engine management system. I'm looking through this to figure out how to trick the computer into thinking the Cold Air Injection system works so I don't get the occasional check engine light. I though others might like to see some of this info...
  9. ** INFO ** Possible way of testing Bosch Motronic (THOR) Crank Sensor

    Range Rover Mark II / P38
    ** INFO ** Possible way of testing Bosch Motronic (THOR) Crank Sensor This may be of no use, and I haven't actually tried it... BUT I was poking around in the Disco II RAVE (I think I was looking to see if a part was the same as in P38, for something unrelated) And I happened to come across a...
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