Asad Posted May 3, 2012 Share Posted May 3, 2012 need help guys Since having my cat back exhaust fitted i had check engine light come on. Had it checked by professional garage was told i need to replace driverside post cat lambda sensor. I had new driver side post cat lambda sensor fitted today but the engine check light is still staying and on now the code reader is showing error code: P1051 I checked this code from the list provided in this forum it is showing as: P1051: A/F sensor heater (bank2) anyone know which sensor this is? alsois there any sensor fuses which i should also check? Quote Link to comment Share on other sites More sharing options...
Dave J Posted May 4, 2012 Share Posted May 4, 2012 Have you tried erasing all the codes then driving again? I recently had a coilpack fail and it threw up all sorts of codes that needed clearing, tried the ECU code reader the next day and no further issues Dave. Quote Link to comment Share on other sites More sharing options...
Zugara Posted May 4, 2012 Share Posted May 4, 2012 Try ecu reset, if it's a heated sensor it will be one that is pre cat. Check under the car and make sure the plugs for the post cats are well connected too. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 4, 2012 Share Posted May 4, 2012 The only code i can find for that fault is P0051 which is bank 2 heater circuit, which i think is the right hand side cat sensor, if you have recently had decats fitted, it could be a couple of things, one being that the sensor was knocked/dropped during removal/refitting, or that the decats don't have a long enough O2 sensor boss, or it needs spacers due to overheating the sensors which is common. If you 350Z is JDM then don't panic, as the cat O2 sensors are not used in fuel calculations, i have a wide-band monitor setup fitted to my car in place of the std sensors, it does throw error codes but that all, and although i have the means to erase the codes its not permanent and they will come back if the perceived fault remains. Quote Link to comment Share on other sites More sharing options...
Peter10 Posted May 4, 2012 Share Posted May 4, 2012 Someone from Abbey M/S may be able to help, I doubt there is much about the 350z they don't know... Quote Link to comment Share on other sites More sharing options...
Asad Posted May 7, 2012 Author Share Posted May 7, 2012 thank you for your suggestions guys. I only had the cat back exhaust fitted. replaced the Y pipe,centre pipe,back box only. Cats are still factory original. garage also removed the rusty heatshields from around the cats. does this mean fault code P1051 is pre cat sensor? not post cat? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 7, 2012 Share Posted May 7, 2012 As i said before there doesn't appear to be that code listed, ( but i am using Skyline 350GT/Infiniti manual, but engine codes should be exactly the same) however it appears to be the collector sensor rather than the cat sensor, and AFAIK they are not interchangeable due to response rate. Are you getting any bad running? IE bad fuel consumption? Quote Link to comment Share on other sites More sharing options...
Asad Posted May 11, 2012 Author Share Posted May 11, 2012 Thank you for your suggestions guys. I had the car rechecked by garage with code reader. The following codes have come up: P0037 ho2s heater control circuit low bank 1 sensor 2 P0057 ho2s heater control circuit low bank 2 sensor 2 P1031 ? P1051 ? My car is 04 plate Uk spec Only mod is the y pipe/centre section/back box exhaust fitted Cats are factory original We have already resetted the codes but they keep returning Any further advice guys? I had already replaced the driver side post cat lambda sensor but all these above codes are still showing. Also anyone know if there are any 02 sensor fuses i should check first? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 12, 2012 Share Posted May 12, 2012 Check the 15 amp fuse in the engine bay fuse box, but i am not certain that its a dedicated O sensor heater fuse, i thought it supplied the ECU as well, other than that, have you checked the connector's for the O2 sensors? Quote Link to comment Share on other sites More sharing options...
Joseph350 Posted June 14, 2017 Share Posted June 14, 2017 Hi I've got the same problem error code p1051 My 350 is miss firing a lot I've replaced my spark plugs and coil ignition Also cam sensor.. I was thinking maybe ecu any help would be great Quote Link to comment Share on other sites More sharing options...
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