Hi All,

Can you help me with these error codes, please?

P0830 Cylinder 8 misfire.

Am I correct to assume that the coil pack for cylinder 8 needs replacing?
What is the best method to test this, where is a good place for parts and would used parts be advisable for this?

P1316

I'm assuming this is in relation to the above error?

P1797

Low battery? Has possibly been sitting for a while what is the best way to test this?
Also, would this cause the parking brake light to remain on even when the brake is released and the window not to close fully when closing the door?

 

If I have not provided enough information or not followed etiquette please let me know.

I'm new to this!

 

Check the misfire by swapping with another coil and see if the code moves.

Have the battery load tested at a local parts store. A weak battery can result in strange codes and also affect windows.

But also do a window reset- Press down and hold until you here a click, then up until the click.

 

Since you have a 98 XKR I expect you are on the other side of the Atlantic from me, but you may want to add your location in case there is a local member willing to assist.

 

^^ What he said.

P1797 is a CAN token fault and can be caused by a weak battery.

The handbrake warning light is likely a sticking switch. See this thread:
https://www.jaguarforums.com/forum/x...7/#post1547411

Member Gus' website is a great resource for information. You will find DTC code information here:
http://www.jagrepair.com/DTCforms/DTCSTART.PDF

 

Thanks guys very helpful, I'll let you know how I get on.

 

Okay charged the battery, sorted windows, may still need to replace the battery though.

Can any body tell me how I can test the coil pack with a meter as the fault code has not come up again since I cleared it but I'm still getting lumpy running?

Also, how do I get to the switch on the handbrake, do I need to take the seat out?

 

P0830 doesn't exist. Presumably a typo for P0308 which is misfire on B4 (8)

Possible causes of the related DTC P1316 are:


(click on the image to enlarge it)

Presumably you've used a generic lookup for the DTC code descriptions? This is often misleading. For the 1998 XKR, P1797 is a transmission error code:


(click on the image to enlarge it)

I've always removed the driver's seat to access the handbrake switch and harness.

Graham

 

Thanks Graham.

 

I've noticed that some of the clips have snapped and don't lock onto the coil packs.
Does anyone have and simple solutions for this or is it typically not a problem?

 

I used high temp RTV to hold them together.

 

How can I test the coil packs with a multimeter?

 

Just to be clear cylinder 8 is the one closest to the windscreen under the air intake?
Move the coil pack to a new location and I still get an error up for cylinder 8, what is the next step to take?

 

That leaves three possibilities, the the ECU, spark plug and the fuel injector. Easy enough to swap plugs, injectors a little harder.

 

Just noticed it's a 98. I'm not sure if the SC had ignition modules, but if so they're at the back of the engine compartment near the middle. Swapping them should help identify the problem.

 

How would I identify the ignition modules?

 

The ignition harness for the coils plugs into the modules. Maybe someone will provide a picture.

 

Okay getting to the root of the problem now I think.
Pulled out the problem spark plug and there was oil on it, very clean oil I might add!
What is my next step now?

 

If I've followed the trail here, you have a consistent fail on Cylinder 8 confirmed by coil swap and also found oil in the plug hole well.

I don't have a photo of the Ignition Module but the illustration (see item 3) from JEPC should help identify them:


(click on the image to enlarge it)

Oil leaks from the cam covers is a regular issue. The main perimeter gaskets fail (usually at the rear) and also the spark plug boss seals (O Rings) which allows oil to leak and collect in the plug hole wells.

Graham

 

Replace the plug, clean the boot and see what happens.