Hello friends,
my 1999 XK8 developed suddenly a whole host of (most likely) unrelated problems. The worst one is "restricted performance" that refuses to be re.se by a scanner. The scanner cannot erase a B 0332 code (it is not listed) - The code P 0332 was deleted and does not come again when I start the engine a run it for a while. The second problem is that I am getting a warning "passenger door open" even when the door is firmly shut and locked. The passenger window switch in the driver's door also stopped to work. I removed it and checked with Ohmmeter and found the switch operational. Remote control door fab also stopped working - a battery is OK.
Any hints, how I should address those problems and make the car operational again?

 

Dneu,

Sorry to hear about your troubles on your car. Lots of problems, which are probably unrelated.

First thing is that P0332 code (DTC excerpt below) could still be the cause of your "Restricted Performance." I suggest you physically check the engine Knock Sensors even after resetting with your OBD scanner.


Never seen a B0332 code, so hopefully another Forum member, more knowledgable than me, will chime in.

As for the passenger's door, you seem to be doing all the right things. But is there any more information? When you open the passenger door, does the window drop an inch? Does the passenger door window switch work? Common faults are electrical so you'll need to get the door card off (simple 5min job - youtube video by Rev Sam aka sam1174) and check all of the connections. There's a microswitch there which is a common fault.

When you say your remote control fob isn't working, do you mean it won't unlock at all. Does it lock the car and can you pop open the trunk/boot? Have you tried to re-programming it?

 

Check Gus's site http://www.jagrepair.com/JaguarXK8El...OBDIIcodes.htm

He has a pretty extensive file set for the various model years of our XK8/R's

 

One vital piece of information you failed to add that could be relevant to your RP issue is shown in your forum profile "1999 Jaguar XK8 with 2001 engine replacement". .......

Graham

 

I have replaced the engine in 2011. It ran fine for 8 years.

 

That was the important bit. My first thought was whether this was coincidental with the engine change or is it a much later issue.

Graham

 

Hi dneu,

Many knock sensor issues, including those that can trigger P0332, can definitely cause restricted performance. Failure of the sensors is not uncommon, but other issues can also trigger these codes, such as a leak from the thermostat housing or valley hose that is wetting one or both knock sensors with coolant.

You may be able to shine a flash light and look down through gaps in the intake manifold plenum for signs of coolant.

Off the top of my head, I believe that on your engine the electrical connectors for the two knock sensors are mounted on the front of the engine near the thermostat tower. You can disconnect each connector and measure the DC resistance across the terminals of the sensor harness. Typically this will be a very high resistance, in the megohm range. See if both sensors measure similarly or if one measures significantly differently from the other. You can also measure for supply voltage on one terminal of each harness connector and ground on the other with the key in position II. If you have an oscilloscope or if your meter has a sensitive AC setting, you can turn the key to position II and use a long screwdriver or 1/4 inch socket extension to tap around each knock sensor and watch for a voltage spike on your scope or meter. In general the knock sensors are somewhat accessible on the normally-aspirated engines but much less so on the supercharged ones.

Your door and window switch issues are unrelated to the restricted performance. The wiring diagrams may help you diagnose the causes and you can download them here:

Jaguar X100 Electrical Guide 1999

Cheers,

Donh

 

Thanks for the advice. I have measured resistance of both knock sensors. L 1,66 MO, R 1.9MO. Restricted Performance suddenly came off. I am afraid it my be in the wires. Connectors are not corroded.,Airbags give blinking code 1-22, Scanner reads "faulty communication with ECU".

 

dnue

For some reason B0332 does not show up in the printed list of DTC's but when I ran a scan of a friend's 2001 XK8 it popped a B0322 when I ran a mobilization of a new ECM to his car. The code is some kind of ECM error code and I was unable to erase it. The ECM started the car and in s near as I could make out it did everything it was supposed to do.

B0322 is not an emission DTC and would not be in a list of OBDII codes since it isn't mandated across all manufacturers. In fact it may men an entirely different things in a GM or Mopar system than it does within Jaguar-Land rover.

I think it's an error of communication either between the Body Processor Module or the Security Module and I too am trying to track down specifically what it means and what can be done about it.