i am new member here and i need your help guys , my S-type 2004 is showing message (Restricted Performance) Which affects the performance of the car, and had tried to solve the problem or examined, but without interest, in most cases, this message appears and at some times and disappear when you receive this message becomes weak performance of the car
Please help me to solve this complex problem

Thank you

 

How old is the battery?

It's your #1 suspect by far.

 

i already changed the battery my dear and still the problem as it is , some people are sying that this problem from the oxygen sensor , and some re saying it is from the throttle , and some are saying it is from the Spark plugs

So i don't know what shall i do and what shall i change

please advice

and by the way i have another message also (park brake fault)


Thanks

 

With that fault as well it's almost for sure a power problem. You may have been sold an inadequate battery or it's now discharged.

Also check trunk - remove spare - for any signs of damp or water.

Doesn't sound at all to be a bad O2 or throttle let alone plugs.

 

+1 to jag v8, are the any codes?

 

Hard to say without the OBDII codes. Please post the codes when you get them.

 

I had the 'restricted performance' message after I ran through large puddle of water after torrential rain. It went away after 15 minutes of running.

I don't know where the water intrusion caused the error but if your message goes away when dry, it may focus your investigation toward preventing water leak.

 

Read the codes! Anything less is a guessing game...

 

Another vote to read the codes!!

They are there for a reason. Please use them!
.
.
.

 

ok guys ,

i am going to check got the code today and i will get back to you

Thanks

 

Hi again

i would like to inform you that the car is going worst than before , it's shaking too much and i can't drive it any more
so i checked the car and i found a lot of trouble codes

P0171 - system too lean
P0174 - system too lean
P0300 - randome / multiple cylinder misfire detected
P0305 - cylinder 5 misfire detected
P0306 - cylinder 5 misfire detected
P1313 No description
P1316 No description
P0102 mass or voulume air flow"A" circuit low
P0112 Intake Air temperature sensor (DTC) (Mode 07)

could you please help me to solve these problems and fix my car

Thanks

 

How many miles on the car? When was the last time the Ignition coils were replaced?

 

It sounds like you have an air leak in your intake system. It will take some investigation to track it down but in the mean time, I suggest avoid driving the car as it can result in further damages to expensive components like the catalytic converter.

Two generic methods of tracking down an air leak:
1 - listen with help of stethscope to various locations for 'hissing' type of sound
2 - spray combustable spray in suspecting area and look for engine idle speed increase

 

wait... he has an air mass meter code and a air temperature code. Both those sensor are a unit in the air mass. I would check the connection at the air mass meter, with all the water and rain maybe it corroded. I've seen it happen.

The meter codes will cause the engine to use a default value for the maf and cause the lean codes.

Also, what kind of air filter do you have? did u put a k & n?

 

Engine_DTCs_42NA

check this link for the codes p0102 and p0112 possible cause u ll see they can both be cause by a disconnected air mass