Engine Management Light - Fault P0012 - Your advice please
Discussion
Hi,
I will really appreciate your advice please.
I run an excellent Toyota Corolla 2004 1.6 Petrol with engine type 3ZZ-E52. This has two chain driven overhead camshafts. The engine has done 91k and runs sweetly, having been well maintained with best oil etc. I have had no prior problems with it over 3 years' ownership and use the car near-daily.
Recently the Engine Management Light (EML) has come on occasionally - about every 2 weeks or so. Mostly I watch it for say 2-4 days and then reset it with my Code Reader (bought for the purpose) although once it went out by itself after a day or so.
I doubt if the camshaft timing has faulted and suspect the sensor. I have inspected the connections on this and all appears fine.
Should I replace the sensor on a try-it-and-see basis? Or do you have any other advice?
I worked for a high-mileage taxi firm in the mid noughties and they taped over their dashboard EMLs, presumably as they found them a nuisance when no fault was apparent. Certainly my Corolla sounds as sweet as a nut. Of course as a pensioner I don't want to incur main dealer charges.
Thanks in advance for your suggestions.
I will really appreciate your advice please.
I run an excellent Toyota Corolla 2004 1.6 Petrol with engine type 3ZZ-E52. This has two chain driven overhead camshafts. The engine has done 91k and runs sweetly, having been well maintained with best oil etc. I have had no prior problems with it over 3 years' ownership and use the car near-daily.
Recently the Engine Management Light (EML) has come on occasionally - about every 2 weeks or so. Mostly I watch it for say 2-4 days and then reset it with my Code Reader (bought for the purpose) although once it went out by itself after a day or so.
I doubt if the camshaft timing has faulted and suspect the sensor. I have inspected the connections on this and all appears fine.
Should I replace the sensor on a try-it-and-see basis? Or do you have any other advice?
I worked for a high-mileage taxi firm in the mid noughties and they taped over their dashboard EMLs, presumably as they found them a nuisance when no fault was apparent. Certainly my Corolla sounds as sweet as a nut. Of course as a pensioner I don't want to incur main dealer charges.
Thanks in advance for your suggestions.
Thanks Red Devil - very helpful link. I am thinking of trying an oil flush additive and with it, an oil change, to try and remove possible "sticky" coatings on the VVT-i mechanism. Also Haynes suggests the Camshaft Position Sensor should show ohms in range 1060 thru 1645 when hot. My sensor hot shows only 950 ohms and cold is similar. I could put a new sensor in. What do you think? Thanks for your communication. Geoff.
If the resistance measurement is outwith the correct range (and there is no wiring fault/duff connection) then the sensor is the likely culprit.
The fact that car is running fine without any other issues would tend to give credence to this.
The sensor is a Denso part. I think the number is either: Toyota 90919-05026/Denso 029600-0660 or Toyota 90080-19014/Denso 029600-0890
I'm not 100% on the Corolla but many Toyota sensors are common across different models. Check with your nearest Mr T stealer.
I suspect that the OEM part won't be cheap though. Once you have the right part number call this supplier for a comparison.
The fact that car is running fine without any other issues would tend to give credence to this.
The sensor is a Denso part. I think the number is either: Toyota 90919-05026/Denso 029600-0660 or Toyota 90080-19014/Denso 029600-0890
I'm not 100% on the Corolla but many Toyota sensors are common across different models. Check with your nearest Mr T stealer.
I suspect that the OEM part won't be cheap though. Once you have the right part number call this supplier for a comparison.
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