Hi All,

I have the "Restricted Performance" message on my dashboard and my OBDII scan shows the P0327 (Knock Sensor) error code.

I had to get some petrol and put some air in my tyres so I gingerly drove my car to the local service station, but I couldn't feel any difference in performance, admittedly, I was only going 60kmh (40mph) on local streets - but it did make me wonder how restricted my car's performance is and is it okay to drive at 100kmh (60mph) until I get it to the mechanic? (booked in to see the mechanic for something else in 4 days).

Can anyone tell me exactly what Restricted Performance means?

Troy.

 

You’ll be restricted to 3000 rpm’s and I believe cruise control is not available.

 

The cruise control will still work, at least on my car. I've mentioned my trip in the summer of '21 several times in my posts as that was when my alternator was half way out, constantly showing 12.6V, so the ECU was going crazy and throwing random codes. While driving I-10 from Deming ,NM, to Austin, TX, the code of the day was for the IAT2 sensor, which puts the car in RP. I cleared it, but it kept coming back on. So after about three times of that, I just went on in RP. Out in West Texas, the speed limit is 80, so I set the cruise control at 80 and we went from about Van Horn to Fredericksburg with no problems. I cleared the code in the last little town and it didn't show up again. That was just short of 400 miles.

For A2b - I have the car in the garage, pictures on that other thread should be sometime over the weekend.

 

There is 2-3 different level of restricted performance. Depending of the fault.

 

Just curious, how often do any of you exceed 3,000rpm?

 

Perhaps not often but certainly regularly, particularly when driving alone. I don’t drive like the proverbial BMW or Subaru owners who think they’re driving in a rally all of the time but I do enjoy leaving the XJR in sport mode and exercising the J-gate enough to exercise the engine, I think it’s therapeutic for the car as well as me.

 

Not often....but enough to recognize if it wasn't there. Here, we have some calcified drivers
who are determined to impact the roads with a much obstruction as possible..... or at least,
it seems that way to me and The Duchess.

 

🙈🙉🙊

 

🤐

I'm so glad it's not just me.... 😇

 

Every time my car goes out I'd say.

 

Well, I have experienced several restricted performance warning with my 2003 X308 over the years. It more or less left me completed stranded. I had hardly enough power to get the car safely of the road.

Never managed to check the RPMs. To much buttock clenching going on! If anything, my thoughts are that the term restricted performance is not correct. Should be “virtually no performance” as far as Im concerned.

Jeroen

 

From memory if you get 'Restricted Performance' and a yellow light above the LCD display, then you get normal driving up to 3k rpm - which gets interesting if you try to pull away quickly as the engine bounces off the limiter at 3k but because of the throttle position the gearbox won't change up until you lift off the pedal. If you get a red light above the LCD display then the throttle doesn't work at all & the engine runs at about 1,200rpm to enable you to creep off the road to a place of safety.

It all depends on what fault has triggered the restricted performance condition.

 

"It depends" is really the only correct answer here, at least without dealer level tools probably.

Mine showed restricted performance when my cruise control failed due to its vac line breaking. Try and use cruise control, and if the controller detected the open loop it would throw that warning message, with no OBD codes.

The side effects of that restricted performance? Cruise control button disabled until next drive cycle. No rpm limits etc, drove perfectly normal.

I can't remember if the ABS module motor fault triggers a restricted performance message as well...

Something else I found out, if you have restricted performance and want the text to stop popping up and annoying you, press "clear" on the trip computer buttons until it returns to odo. Yellow light will stay, but hey what can you do.

 

In my case, the restricted performance is due to a intermittent P0327 (Knock Sensor) error. I didn't notice any change in performance while driving around the city and on the motorway, admittedly, I was driving rather gingerly due to the warning message.

 

In my f type,restricted performance won’t let the auto transmission change appropriately so I have to use the manual gear paddles

 

limited to 3k rpm, so try to boot it down the road & it hits the 3k limiter without changing gear & bounces off it.

 

Sounds a bit like Limp mode, which is one step up from not going anywhere.

Can be that the car cannot figure what's good and what's bad - and may also be unable to flag codes due to having no idea what to trust.

 

year old post! And the new F Type is entirely different