P1621 fault code - but my car has been off the road for 2 months! Please help.
#1
02-26-2008, 02:22 PM
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P1621 fault code - but my car has been off the road for 2 months! Please help.
Hi there,
Forgive me if I use incorrect terminology, Iam after all a girl - however I love my Jag!
It is XJ6 2.3auto 96.
I was driving along a straight road 50 mph and the revs just dropped to zero. The car started normally after 15 minutes and continued for another 10 minutes before the same thing happened. My garage guy has welded bits, mended bits, checked all sorts of electrical bits and finally after 2 months found fault code P1621 so I think relating to the immobiliser. I got a replacement 2nd hand ECU and this has been fitted but the car still cuts out after about 10 minutes and then wont start for 10 minutes. (i.e. same problem as before)
Can anyone please help with what to check next?
Many thanks
Forgive me if I use incorrect terminology, Iam after all a girl - however I love my Jag!
It is XJ6 2.3auto 96.
I was driving along a straight road 50 mph and the revs just dropped to zero. The car started normally after 15 minutes and continued for another 10 minutes before the same thing happened. My garage guy has welded bits, mended bits, checked all sorts of electrical bits and finally after 2 months found fault code P1621 so I think relating to the immobiliser. I got a replacement 2nd hand ECU and this has been fitted but the car still cuts out after about 10 minutes and then wont start for 10 minutes. (i.e. same problem as before)
Can anyone please help with what to check next?
Many thanks
#2
02-26-2008, 04:38 PM
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#3
02-28-2008, 07:40 AM
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#4
02-28-2008, 07:54 AM
#5
02-28-2008, 09:46 AM
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RE: P1621 fault code - but my car has been off the road for 2 months! Please help.
Hi Michael,
The garage guy checked all the wires on the original ECU with the result that the car started much faster! The replacement ECU is in even better condition and is from a reputable source. I think it is prettyunlikely that both of these ECUs have the same fault. My (very unknowledgable) feeling is to look elsewhere in the car. We have also checked the voltage to the fuel pump (injection or whatever) and that was still ok even after it cut out.
Thanks for helping.
Pam
The garage guy checked all the wires on the original ECU with the result that the car started much faster! The replacement ECU is in even better condition and is from a reputable source. I think it is prettyunlikely that both of these ECUs have the same fault. My (very unknowledgable) feeling is to look elsewhere in the car. We have also checked the voltage to the fuel pump (injection or whatever) and that was still ok even after it cut out.
Thanks for helping.
Pam
#6
02-28-2008, 05:45 PM
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RE: P1621 fault code - but my car has been off the road for 2 months! Please help.
I don't think it's that drastic. The steering locks only when the key is removed. By your description, I would change the entire lock assembly. I'm just guessing, but I would be the lock is bad and breaking all contact. It's telling the car to shut and lock the steering. It would be the only that that combines the two symptoms that I can think of.
#7
03-01-2008, 08:21 AM
RE: P1621 fault code - but my car has been off the road for 2 months! Please help.
Ken, you probably know better than me, as I'm totally unfamiliar with the car, but kinda sounds like an old time problem of the coil heating up, quitting, and after a short cool down, letting the car start again. Just a thought. Keith.
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#8
03-01-2008, 08:27 AM
RE: P1621 fault code - but my car has been off the road for 2 months! Please help.
Pammyjz, by "The garage guy", are we referring to a qualified Jaguar mechanic? Or just the local grease monkey down at the local garage? Not to knock the local grease monkey, if thats what he is, cause their place in history is well established, but, definately not the place to take your beloved Jaguar. Keith
#9
03-01-2008, 08:30 AM
#10
03-03-2008, 05:27 AM
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RE: P1621 fault code - but my car has been off the road for 2 months! Please help.
Hello Keith, Ken at al,
My husband is the only other person who regularly drives the car and he says the steering hasnt locked when it has cut out with him - so - any ideas based on this are also welcome.
The guy who is looking at it isnt a Jag specialist but he is an electrical specialist. He still seems to think the problem is probably electrical.
Many thanks
Pam
My husband is the only other person who regularly drives the car and he says the steering hasnt locked when it has cut out with him - so - any ideas based on this are also welcome.
The guy who is looking at it isnt a Jag specialist but he is an electrical specialist. He still seems to think the problem is probably electrical.
Many thanks
Pam
#11
03-03-2008, 04:59 PM
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RE: P1621 fault code - but my car has been off the road for 2 months! Please help.
Without the steering condition, go back to Keith's suggestion on ignition coil. Look for signs of leakage on the under side of it. Sounds like Keith is dead on. It hits up and cuts out / cools off and runs again.
As an outside thought (and I mean way outside) check the resistance on the battery cables. The computer feeds directly from the battery since it's more stable. Maybe resistance is building?
As an outside thought (and I mean way outside) check the resistance on the battery cables. The computer feeds directly from the battery since it's more stable. Maybe resistance is building?
#12
03-04-2008, 08:19 AM
#13
03-05-2008, 08:10 PM
RE: P1621 fault code - but my car has been off the road for 2 months! Please help.
OK, a little more info please. You said the steering locked up with you, and doesn't with your husband. How many times did it lock up with you? And did it lock up each and every time the motor died? Just looking for a possible coincidence of some sort, not related to the motor stopping. I hate the idea of throwing money at problems without knowing exactly what it is, but, the cost of a new coil is pretty minor, and would certainly eliminate that possiblility. Keith
#14
03-06-2008, 09:32 AM
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#15
03-06-2008, 10:03 AM
#16
03-06-2008, 02:59 PM
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#17
03-08-2008, 01:44 PM
RE: P1621 fault code - but my car has been off the road for 2 months! Please help.
Ken, just wondering, going along with my first suggestion. Maybe buy only one new coil, and try it in place of each "old" coil. Still not the best solution, but, short of turning it over to a mechanic, might still be a cheaper way to go.
#18
03-10-2008, 04:50 PM
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#19
03-12-2008, 06:13 PM
Keith
#20
03-12-2008, 08:23 PM
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RE: P1621 fault code - but my car has been off the road for 2 months! Please help.
maybe the car is cutting out due to fuel problem.. and she is thinking the steering locks but it doesnt... when engine die's power steering dies as wheel making it give the effect the steering is "locked" simple problem to find..
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