2000 s type error code help
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I'm asking for some help for a friend, as titled 2000 Jaguar s type error code = P1383 and P1388. The car idles fine cruise is fine under accelleration it stumbles and coughs but runs. As I stated this is for a friend, I'm a nissan 350z guy so I have no experience and my scanner can't ID these codes. Thanks...
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Lentz, Codes P1383 and P1388 are both for the variable valve timing circuit being overly retarted (timing that is, not being dumb). P1383 is for bank 1 (cylinders 1,3,5) and P1388 is for bank 2 (cylinders 2,4,6). The possible causes is:
1) wiring problem between the PCM and the actuator
2) stuck actuator
3) actuator oil supply fault
Possible problems 1 and 2 would require 2 separate faults to make them occur. While possible, unlikely unless your friend has been living with one of the problems for some time. So, that leaves an actuator oil supply problem. HOw long has it been since your friend last changed his oil? If it has been a long time, I would start there and see if things improve. May want to consider running an oil detergent through the engine to help clear out some of the gunk if this is the case. Beyond that, not sure what to say. I don't know the insides of these engines well enough to go much beyond this. But, hopefully this will atleast give you a starting point.
1) wiring problem between the PCM and the actuator
2) stuck actuator
3) actuator oil supply fault
Possible problems 1 and 2 would require 2 separate faults to make them occur. While possible, unlikely unless your friend has been living with one of the problems for some time. So, that leaves an actuator oil supply problem. HOw long has it been since your friend last changed his oil? If it has been a long time, I would start there and see if things improve. May want to consider running an oil detergent through the engine to help clear out some of the gunk if this is the case. Beyond that, not sure what to say. I don't know the insides of these engines well enough to go much beyond this. But, hopefully this will atleast give you a starting point.
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Oil has been changed regularly I was told. I'm assuming it was the right viscosity. I did find a TSB for this issue (S303-09) that requires the PCM to be reprogramed with a different software based on VIN number with some needing to be more "agresssive" than others.
Last edited by fklentz; 03-24-2009 at 10:18 PM.
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Must be NA engine, I have twin turbo, 412 RWHP 390 TQ. There was a comparision of power on a TT VQ35 with fully ported heads ( 4K cosworth heads) and stock with just cams, and valve springs. The ported build made 6 HP more than the stockers, go figure, that was an expensive 6 HP.
Last edited by fklentz; 03-24-2009 at 10:09 PM.
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Stype, something you may want to try is getting a bottle of oil detergent (I use stuff called CD2). Add that about 100 miles before you next oil change and then drain out your oil like you would any time you change the oil. This bottle is simply the detergents that get added to normal oil. But, in this case, you are adding some extra and I have had motors that have responded very well to this product (only like $3). Some motors though have not been affected by the extra detergent. But, it is a cheap thing to try.
As you are adding the detergent, do a quick look at the plugs for the VVT. If you are going to have an issue with the wiring, this is the most likely place. Also, did you recently do anything to the car? Just trying to eliminate likely sources.
As you are adding the detergent, do a quick look at the plugs for the VVT. If you are going to have an issue with the wiring, this is the most likely place. Also, did you recently do anything to the car? Just trying to eliminate likely sources.
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Lentz, Codes P1383 and P1388 are both for the variable valve timing circuit being overly retarted (timing that is, not being dumb). P1383 is for bank 1 (cylinders 1,3,5) and P1388 is for bank 2 (cylinders 2,4,6). The possible causes is:
1) wiring problem between the PCM and the actuator
2) stuck actuator
3) actuator oil supply fault
Possible problems 1 and 2 would require 2 separate faults to make them occur. While possible, unlikely unless your friend has been living with one of the problems for some time. So, that leaves an actuator oil supply problem. HOw long has it been since your friend last changed his oil? If it has been a long time, I would start there and see if things improve. May want to consider running an oil detergent through the engine to help clear out some of the gunk if this is the case. Beyond that, not sure what to say. I don't know the insides of these engines well enough to go much beyond this. But, hopefully this will atleast give you a starting point.
1) wiring problem between the PCM and the actuator
2) stuck actuator
3) actuator oil supply fault
Possible problems 1 and 2 would require 2 separate faults to make them occur. While possible, unlikely unless your friend has been living with one of the problems for some time. So, that leaves an actuator oil supply problem. HOw long has it been since your friend last changed his oil? If it has been a long time, I would start there and see if things improve. May want to consider running an oil detergent through the engine to help clear out some of the gunk if this is the case. Beyond that, not sure what to say. I don't know the insides of these engines well enough to go much beyond this. But, hopefully this will atleast give you a starting point.
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