D4 Red triangle restricted performance

[Declan]

Hi lads
On my way to go 4WD today got a red triangle restricted performance on my D4.

Got out the IID tool and it showed no faults?
There were no faults in any ECUs

So I pressed clear all faults to see what would happen and it cleared the fault even do it was not showing.

Drove about half a kilometre and the fault came up again?

Cleared the fault and headed back home ( no 4WD today 😭.

The fault raised it head a couple of times on the way back home but the IID tool clears it every time even do it's not showing as a fault.
Has anybody come across this?,I have looked at some of the threads restricted performance but they all had some type of codes.

Nearly forgot fitted a new battery yesterday as the other one had died,it's charging so that's all good any replies would be appreciated.

Thanks Dec.

[LRD414]

Sounds very similar to mine, details at this thread including required settings for iid to read the codes:
Restricted Performance Event

Cheers,
Scott

[Declan]

Thanks Scott, I have put my.IID tool on pending so when the red triangle restricted performance comes up again hopefully I get.some type.of code fault.

[LRD414]

And turn off Confirmed so that Pending can be displayed.

[Declan]

I will LRD414 thanks for letting know.

[Declan]

Hi lads no luck even with changing the IID tool to pending still showing the red triangle restricted performance.
Next I'm going to pull out the MAF air sensors and give them a clean hopefully it's just a build up of carbon.

If anyone knows of any other sensors for me to look at please let me know ,I'm going to try and look at all the trubos pipes to make sure there's no leaks ,this definitely is a puzzleing fault in that it does not come up on the IDD tool in confirm or pending status 😠

[DiscoJeffster]

Hi lads no luck even with changing the IID tool to pending still showing the red triangle restricted performance.
Next I'm going to pull out the MAF air sensors and give them a clean hopefully it's just a build up of carbon.

If anyone knows of any other sensors for me to look at please let me know ,I'm going to try and look at all the trubos pipes to make sure there's no leaks ,this definitely is a puzzleing fault in that it does not come up on the IDD tool in confirm or pending status 😠

Very odd. I've never seen a restricted performance error that doesn't log. Double checked pending is still set?

Air leaks have always been my downfall that caused restricted performance errors.

[Graeme]

Both pending and confirmed should be ticked and read the faults again if an option is changed.

Note that changing the IIDTool settings is only for the tool's ability to show you the stored faults.

[Declan]

Thanks Graeme for the feedback.

Latest update is I cleaned both airflow sensors and swap from left to right when refitting to the air filter box and low and behold when I got the restricted performance again I had a fault code 😁

I believe I need a new air MAF sensor as the code says

P006-00A (27) ABSOLUTE PRESSURE - MASS OR VOLUME AIR FLOW CORRELATION.

Do you know exactly what this means anybody.

Thanks Dec.

[DiscoJeffster]

Thanks Graeme for the feedback.

Latest update is I cleaned both airflow sensors and swap from left to right when refitting to the air filter box and low and behold when I got the restricted performance again I had a fault code

I believe I need a new air MAF sensor as the code says

P006-00A (27) ABSOLUTE PRESSURE - MASS OR VOLUME AIR FLOW CORRELATION.

Do you know exactly what this means anybody.

Thanks Dec.

This is telling you that the MAF and MAP sensors are not agreeing eg the MAF saw a lot of air into the engine but the boost level didn’t reach the expected value for that much air. This typically means you have a leak. 2.7L typically see a split intercooler hose. 3.0L see intake manifold splits and throttle body split as a common fault.