2004 Jaguar S-Type

EBUNN

MEMBER
2004 JAGUAR S-TYPE
V12
2WD
AUTOMATIC
58,787 MILES

A week ago I had taken by car in (Check Engine) Codes revealed P0300, P0303, P0306. Replaced Coils Was told it was a misfire on Coil #3, replaced all coils for precaution and took advantage of no additional labor. And fuel injectors cleaned.

A week later and 150 miles, I had to have the car towed in. Engine Light on again. Car slowed down as you were driving. Code (?) Revealed it needed A Throttle Neck Sensor. $1200.00. I looked it up and I see the throttle neck sensor was aproximately $250-$300. They said it can't be broken up in parts like that it comes in one piece and the cost is $1200.00 for the additional part what ever that is.
I'm in shock. I had to come home and lay down.

What I received in the mail today was an Emission Recall J004 -Emissions Calibration -Jaquar to reconfigure ECM using WDS
I saw that somewhere. I looked at my bill from last week and saw that the ECM was also reprogrammed at N/C on the car.

My question:
Could the reprogramming cause a false reading or possibly cause something like to happen?

Can it be programmed back?

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

A P0300 Random Misfire code usually indicates a vacuum leak or bad gas.

If a misfire in a specific cylinder should lead you to check the spark plug, fuel injector and compression.

My question:
Could the reprogramming cause a false reading or possibly cause something like to happen?

Can it be programmed back? They can try reflashing it again and see what happens