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1995-2002 Range Rover P38A
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Discussion Starter · #1 ·
Hello mighty forum guys
Please help!- I have no idea about anything (I am a widow and inherited the P38- RR 2001 HSE) so pls. don't tell me I'm
dumbo (actually you can tell but is of no use)...
sequence of events:
  1. had a major coolant leak through the expansion tube (afterward, I came to the conclusion/presumption that the cap was not tightened properly when I added coolant since right now- after refill- there is no visible loss anymore)
  2. had to change the battery (did a by-pass so I don't lose the BECM codes); new battery is Group 31 12-Volt Commercial Battery, 950 cold-cranking amps, 1170 cranking amps, 175 minutes reserve capacity (so I assume is good for P38)
  3. at first drive after battery change I've got "service engine soon"; a neighbor checked the codes for me before I go to a mechanic
  4. told me he got 2 codes:
  5. P1667 (powertrain fault? according to his reader)- on the forum I found P1667 is "Engine anti-theft signal circuit low Serial link short circuit to earth"
  6. P055 (also, as he told me- loss of cooling fluid; could be related to the recent leak that was registered/remanent in the computer?)- OK, since there is no such code I assume is/he meant either:

  • P0505 Idle control system malfunction Blocked IACV - high or low rev/min error
  • P0155 O2 sensor heater circuit malfunction (bank 2, sensor 1) Front sensor heater RH bank - short/open circuit
  • P0550 Power Steering Pressure Sensor Circuit Malfunction

Now, the question is: are these computer malfunctions/gremlins after the battery change without resetting the computer?
How bad am I standing, you think?The way it seems I have 3 choices and I ask your opinion, guys:

  1. try to disconnect the battery to reset codes & clean the connectors (which hasn't been done when I replaced the battery, mea culpa)
  2. go to a cheap mechanic that I know (who doesn't know much about RR specifically) and see... (he will offer to clear the codes, probably, but it might be a good idea or not...)
  3. go to the dealer- which will kill me...(I am low budget, shops take advantage of widows big time-ie. last oil change cost me $500...- and I am not sure a 2001 car is worth it anymore)
I also have to mention that the oil(synthetic) is pretty old by now (about 3 years) but 3 people told me it still looks OK since I drive about 1000K/year (that alone should tell you something about me and my RR...)
Any suggestion is appreciated! (might be that I don't make much sense with my story to ¯\_()_/¯you so ask me anything)


27,834 Posts
Disconnecting the battery will not reset codes. Unless your mechanic has diagnostic gear that can read LR specific codes there's no need to incur a bill.

There is no reset of any computer necessary after a battery change. The only thing you need to do is wait 10+ minutes IF you have GPS. This gives the GPS computer the time needed to store that satellite positions for a faster reboot. Not waiting can "brick" the GPS.
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