1996 jaguar xj6 dtc test code p1178

we can't tell you what you can do, lacking skills and tools and spares.
I can tell you what a shop does. sure.
P0300 means all cylinders of the engine are missing,
means (physics) weak combusting on all cycl.
bad spark all or bad injections to all (lean) or engine cam out of time?
P1 codes are factory only codes. Jag codes
P1000 means car is not ready for smog tests, the , onboard readiness is not complete, means drive for a day or 2 and is caused by scan tool DTC reset or battery on car went dead or was disconnected.
next P1316 _
Misfire Excess Emission, get the shop to find it.
there are a battery of test to do.
even low fuel pressure can trip p0300.
goes lean ,combustion goes weak and BINGO gross misfire.
or bad spare, but how can all fail and not get one cmp or ckp errors>?
bad fuel> too. put diesel in the gas?
park parked over 1 year or parked less, with 1/8 tank for long long months?
we can not guess history of any car.

OBD-II Trouble Code: P0443 Evaporative Emission Control ...

www.obd-codes.com/p0443

P0443 - Evaporative Emission Control System Purge Control Valve Circuit ... P0443 trouble code symptoms could be just an malfunction indicator lamp (MIL) ... But, it's also possible to have a lean condition or a rough running engine if the ...Missing: jaguar ‎xj6

P0443 OBD-II Code and Check Engine Light - Jaguar Forums - Jaguar ...

www.jaguarforums.com > ... > XJ XJ8 / XJR ( X308 )

Feb 24, 2014 - Anyone have an idea on where to look for this? Jaguar® Leasing Deals.... P0443 OBD-II Code and Check Engine Light-xj8-purge-valve. .... Newby with air suspension fault, philwarner, XJ XJ6 / XJ8 / XJR ( X350 & X358 ), 7 ...Missing: 1995

Error code p0443..Think dealer is on crack - F150online Forums

www.f150online.com/.../287418-error-code-p0443-think-dealer-crack.h...

try jaguar forums links provided .defo more info on them

XJ6 XJ12 Series II III Jaguar Forums Jaguar Enthusiasts Forum

Jag lovers Forums

hi there i would be checking the crank angle sensor this tells the computer when and where to fire the ignition and sets the timing

TO RESET ECM ON A 1988 XJ6 JAGUAR.YOU DISCONNECT NEGATIVE BATTERY CABLE FOR 30 SECONDS TO CLEAR CODE.THIS WONT DO ANY GOOD IF YOU HAVE A ECM TROUBLE CODE DONT FIX PROBLEM.CHECK ENGINE LIGHT WILL STAY ON, UNTIL YOU FIX FAULTY COMPONENT OR SENSOR.

Code 44 means that the oxygen sensor is signaling the computer that the fuel mixture is bad - too rich or too lean.

my manual says fuel fail 14 deals with yourr coolant temperature sensor is no in operating range

Using a scan tool should turn lite out

this is the most common error code, just means the one of the nods in fuel pump misfired, on every model other than the ones for usa market, after clearing the error code on vcm the check engine light would reset. for our cars its programmed to stay on.
also get fail 17 fuel 17 same thing
it will not effect the running of the car or its performance
may run a little rich

Many cars of that period could be reset by some ignition key sequence.
Try switching from the off position to the on (not start) several times within 15-30 seconds.
It won't hurt anything and might turn off the light.
If the problem is still present that caused the light to go on the first time, it will likely come on again after you start the engine.

I hope the reason for that alarm light has been since corrected.

Some cars needed to have the battery disconnected for several minutes to cancel the memory contents.
Newer cars will not likely respnd to that since flash memory is now common which retains the error code even without power.