Toyota corolla check engine light
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From: Devils Advocate on 15 Jul 2007 22:15 scan result say " inproper coolant temp" or something to that effect. Does this mean just as it says, the coolant needs replacement. It is good for about -20
From: Jeff on 15 Jul 2007 22:37 Devils Advocate wrote: > scan result say " inproper coolant temp" or something to that effect. > > Does this mean just as it says, the coolant needs replacement. > > It is good for about -20 For your car to work more efficiently, the coolant has to get to a specific temperature. If your thermostat is not letting the engine get warm enough, I suspect that is could cause this warning. And it means it is time for a coolant flush and new thermostat. It would help to know what year, mileage, engine and the exact code (including any code numbers) that you have. In addition, what has the temperature gauge been reading compared to what it used to read? Jeff
From: Ray O on 16 Jul 2007 00:34 "Devils Advocate" <devilsadvocate66(a)hotmail.com> wrote in message news:469ad4a4$0$8824$9a566e8b(a)news.aliant.net... > scan result say " inproper coolant temp" or something to that effect. > > Does this mean just as it says, the coolant needs replacement. > > It is good for about -20 > > I would help to know what model and model year Corolla, how many miles are on the odometer, recent service history, and actual diagnostic trouble code ("DTC"), i.e. P115, P116, etc. The electronic control unit monitors engine coolant temperature through the coolant temperature sensor for the ECU, but IIRC, the trouble can also indicate a leak in the exhaust system. -- Ray O (correct punctuation to reply)
From: Jeff Strickland on 16 Jul 2007 13:06 "Ray O" <rokigawaATtristarassociatesDOTcom> wrote in message news:6Yqdna9muM7MZQfbnZ2dnUVZ_rmjnZ2d(a)comcast.com... > > "Devils Advocate" <devilsadvocate66(a)hotmail.com> wrote in message > news:469ad4a4$0$8824$9a566e8b(a)news.aliant.net... >> scan result say " inproper coolant temp" or something to that effect. >> >> Does this mean just as it says, the coolant needs replacement. >> >> It is good for about -20 >> >> > I would help to know what model and model year Corolla, how many miles are > on the odometer, recent service history, and actual diagnostic trouble > code ("DTC"), i.e. P115, P116, etc. > > The electronic control unit monitors engine coolant temperature through > the coolant temperature sensor for the ECU, but IIRC, the trouble can also > indicate a leak in the exhaust system. > -- How do the exhaust and coolant temp tie together Ray? (I'm not suggesting you are wrong, I'm suggesting I don't know what the relationship is among these disparate systems.)
From: Ray O on 16 Jul 2007 22:29
"Jeff Strickland" <crwlr(a)verizon.net> wrote in message news:4ANmi.449$SM6.263(a)trnddc01... > > "Ray O" <rokigawaATtristarassociatesDOTcom> wrote in message > news:6Yqdna9muM7MZQfbnZ2dnUVZ_rmjnZ2d(a)comcast.com... >> >> "Devils Advocate" <devilsadvocate66(a)hotmail.com> wrote in message >> news:469ad4a4$0$8824$9a566e8b(a)news.aliant.net... >>> scan result say " inproper coolant temp" or something to that effect. >>> >>> Does this mean just as it says, the coolant needs replacement. >>> >>> It is good for about -20 >>> >>> >> I would help to know what model and model year Corolla, how many miles >> are on the odometer, recent service history, and actual diagnostic >> trouble code ("DTC"), i.e. P115, P116, etc. >> >> The electronic control unit monitors engine coolant temperature through >> the coolant temperature sensor for the ECU, but IIRC, the trouble can >> also indicate a leak in the exhaust system. >> -- > > > How do the exhaust and coolant temp tie together Ray? (I'm not suggesting > you are wrong, I'm suggesting I don't know what the relationship is among > these disparate systems.) > If DTC P0125 - Insufficient coolant temp for closed loop operation - comes up, then the thing to check is the heated O2 sensor and exhaust leaks. IMO, the SAE description is misleading and confusing, one of the few times it is. If P0115 or P0116 comes up, then check the coolant temp sensor, thermostat, and coolant. -- Ray O (correct punctuation to reply) |