P1621 fault code - but my car has been off the road for 2 months! Please help.
Senior Member
Joined: Jan 2008
Posts: 216
Likes: 9
From: Just outside of Little Rock, Arkansas
RE: P1621 fault code - but my car has been off the road for 2 months! Please help.
Hey, didn't realize this was going to be a trick question! Geeez, how unfair is that, 3 problems, I have enough problem dealing with one!
Joined: Jan 2008
Posts: 303
Likes: 2
From: Georgia
RE: P1621 fault code - but my car has been off the road for 2 months! Please help.
Hey Pam
Have you or your tech checked front crank signal when fault occurs?
Getting to be a pretty know problem with these cars as they are getting older as car warms up sensors can and do fail OC or below spec output to ECM
Ive had a few including my own 95 xj6 last year
took me awhile to figure it out and i am a Jag Tech lol
Also P1621 ECM fault/failure is quit often caused by the ignition coils as they age and crack they begin to arc to the cam cover spark plug holes
and in turn the ECM can be damaged from the spiking or grounding out of the coils
The price of new ECM if you can get at our dealer is close to 3 grand
Its kind of hit or miss on getting a good known ECM
Good luck and continue to keep us posted
Have you or your tech checked front crank signal when fault occurs?
Getting to be a pretty know problem with these cars as they are getting older as car warms up sensors can and do fail OC or below spec output to ECM
Ive had a few including my own 95 xj6 last year
took me awhile to figure it out and i am a Jag Tech lol
Also P1621 ECM fault/failure is quit often caused by the ignition coils as they age and crack they begin to arc to the cam cover spark plug holes
and in turn the ECM can be damaged from the spiking or grounding out of the coils
The price of new ECM if you can get at our dealer is close to 3 grand
Its kind of hit or miss on getting a good known ECM
Good luck and continue to keep us posted
Guest
Posts: n/a
RE: P1621 fault code - but my car has been off the road for 2 months! Please help.
Solved it!
Itraced a previous owner who put me in touch withan oldmechanic who used to service the car etc etc.
Net - we have replaced the Crank Shaft Sensor (cost £70) and the car has been running perfectly since. Apparantly this is so common the guy I spoke to carries them as part of his 'kit'. I'm not sure about that storybut who cares. I have my lovely car back on the road.
Thankyou all for your interest and your time. I'll come back here first if I have any future problems.
Best regards
Pam
Itraced a previous owner who put me in touch withan oldmechanic who used to service the car etc etc.
Net - we have replaced the Crank Shaft Sensor (cost £70) and the car has been running perfectly since. Apparantly this is so common the guy I spoke to carries them as part of his 'kit'. I'm not sure about that storybut who cares. I have my lovely car back on the road.
Thankyou all for your interest and your time. I'll come back here first if I have any future problems.
Best regards
Pam
Junior Member
Joined: Apr 2014
Posts: 4
Likes: 0
From: Leiria
Sovereign 3.2. Fault code p1621
Hi guys
My Jag have problems again.
Yesterday i put my Jag into my garage, everything ok. Today when i go to The work, The car won't START, The engine don'run. The alarme don't Work, when i Put The key in The ignition switch, all dash is on, but when i START The engine .... Nothing.
The shifts with The ignition on go to The rear, D, 2 and 3 without brake.
My diagnosis show The fault code P1621, i clean The fault , but appear again.
Someone could help me.
Regards
My Jag have problems again.
Yesterday i put my Jag into my garage, everything ok. Today when i go to The work, The car won't START, The engine don'run. The alarme don't Work, when i Put The key in The ignition switch, all dash is on, but when i START The engine .... Nothing.
The shifts with The ignition on go to The rear, D, 2 and 3 without brake.
My diagnosis show The fault code P1621, i clean The fault , but appear again.
Someone could help me.
Regards
Last edited by Induzido; Dec 30, 2014 at 07:48 PM.
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