Error Code P1121 - Could It Be To Do With Maf Sensor?

[gs300sport]

Hi

Recently had an engine light on the car.. car went into limp mode.

after taking it to lexus they diagnosed it with the

P1121 = Accelerator Pedal Position Sensor/Range Performance.

After looking about on the net I found the following

P1121 = Throttle Position (TP) Sensor Inconsistent With MAF Sensor High Voltage

I am wondering if the error is to do with the airflow and a dirty Maff Sensor and maybe a Dirty Throttle Body.

The car is in deperate need of a service.... I have recently bought the car and the air filter is very dirty. I have ordered a new one but would the chances of the filter being dirty actually causing the engine light to throw the P1121 Code?

[Mr Morse]

The 2JZ MAF sensor is very sensitive to dirt....get some switch or contact cleaner from Maplin and give it a good clean.

Sounds like the TB would also benefit from a good decoking with carb cleaner as well

[gs300sport]

Hi

thanks for the reply

Is this the stuff you mean??

http://www.maplin.co.uk/Module.aspx?Module...ol&doy=29m8

Also what would you recommend for cleaning the throttle body??

is there a spray i can use?

cheers

[Mr Morse]

Hi

thanks for the reply

Is this the stuff you mean??

http://www.maplin.co.uk/Module.aspx?Module...ol&doy=29m8

Also what would you recommend for cleaning the throttle body??

is there a spray i can use?

cheers

Yep that suff is fine

For the TB go to Halfords or other auto parts supplier and get some carburettor cleaner.....or failing that, Mr Muscle Oven Cleaner!

[randyreindeer]

That mr muscle stuff is great for cleaning ally inlet manifolds but i've only tried it on the outside.

[gs300sport]

update

I replaced the air filter, cleaned MAF sensor and Throttle Body and I have not had a single engine light on since.

So if anyone ever gets P1121 = Accelerator Pedal Position Sensor/Range Performance code then that could be cause of the problem.