Hello guys

[9rvin]

I think i have little problemwith my Rcz. TODAY it startet to go In Safe Mode or something like that very slow accelaration with 2 Faultycode : (P0131)heated oxygen sensor 1,bank 1 low presure and (P0171) system to lean bank,1 i have checked and cleaned all airtakes airfilter sparkplugs etc everything.. i have take the bank,1 o2 sensor out (it was very dirty and black) cleaned and put it back.. then i resetet or delete the fulty codes and the car was like a new but just for 45 min.. and then i once again have recived the same P0131 code ‍ but without P0171 hmm.. i dont know what to thing if somebody can explain this i will be very Thankful thanks guys! And Happpy Eastern

 

[9rvin]

Correction : (P0131)heated oxygen sensor 1,bank 1 low Voltage or NO voltage..

 

[Pedro]

P0131- Oxygen sensor circuit too low possibly the sensor is failing altogether as its rare to get a bad circuit on the Lambda plug ins unless the wring has been opened plus by cleaning the sensor you eliminated P0171 = System too lean bank 1 but there are 2 sensors monitoring the emissions as the upstream measure before the cat & the downstream after the cat & these send data to the ECU regarding the Air fuel/ratio mixture monitoring if its too lean or too rich
if one is failing then I would change both together as they both do a important job in engine performance

 

[9rvin]

Yess i will do that thanks but just before half hour i get the P0171 3 time in a row.. and no trace from actual P0131 now the motor shacking little bit on idle ...

 

[Pedro]

P0171 bank 1 is too lean so you may have a problem of too much air & too little fuel =The fuel Air ratio for bank 1 is out of sync could explain your lumpy idle so you need to (A) check for no vacuum leaks or the following possible causes & the table also refers to "Faulty Oxygen sensors"

 

[9rvin]

Okay i understand you.. how to check for a vakuum leaks?and where ?

 

[Pedro]

A bad vac leak is exposed through a smoke test but you should look at all the air intake pipes just check all the clips are tight see if there is no visible signs of cracked hoses or if you hear any slight hissing sounds another point I forgot to mention is Bank 1 system too lean could also point to low fuel rail pressure which has been known to be a faulty HP fuel pump & a generic failure on all the RCZ variants unless you have had yours changed don't overlook that possible issue

 

[Verminator]

More than likely to be hpfp (high pressure fuel pump)..... Also check your battery..

 

[9rvin]

No My HP pump its not changed at all.. and I am Sounding some klack-klack on the Pasenger site sound more like diesel engine thanks Pedro for yours Hints but still dont know where to start .. p.s the car hat 102000km and its a 156thp GT model from 2011

Hi Verminator i dont have any problems with the batery the car startet without any problems... hmm.. how do you mean? I dont know How? Do in need special tool?some voltagemeter or something?

 

[9rvin]

 

[Pedro]

Pump faulty ? Timing chain & tensioner if original on 102.000 would mean they have surpassed the recommended end of life service & need replacing urgently as for the clacking is it on the top or bottom side of engine ?

 

[9rvin]

Hello people it was the lambdasonde 1. Everytnig runnig smooth right now... thanks

 

[Pedro]

Good but I would have changed both as they work as a pair