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From: Sundar on 31 Mar 2007 13:52 Hi, I have the check engine light on in my 2000 Toyota Camry. I checked with a local mechanic for the codes. They turned out to be P0125 - Collant temp low (suggested changing the thermostat - cost $70) P1143 - B1S1 not shifting (suggested changed 02 sensor cost $185). My knowledge on autobilies is limited. I would like to know what the above codes mean. Change of the parts the only option? I am price concious so if there is something that can be tried before change of parts would be very help. Any advice would be helpful -Sundar
From: Jeff Strickland on 31 Mar 2007 15:29 P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control My source does not list the P1143, but 1142 is a Subaru code, and 1144 is for Volkswagen. My source could have old information, so do not be alarmed. Somebody else will chime in here. From what I can determine (by the description you gave), these two appear to not be related. Codes can get stored and not reported, then when something DOES happen that gets displayed, the older recorded codes will also appear. These older codes might be from transient causes, and the trouble occured a long time ago and never occured again. If this were MY car, I'd reset the codes after recording them in a log, and see if either of them pop up again then set about to repair the fault that repeats. Your car is ODB II compliant, this means you can buy a scan tool for under $100 that will display the codes and reset them for you. If you have an Autozone parts store nearby, they will either pull codes for you or let you take the tool to the parking lot where you can pull them yourself. The procedure is simple, and just takes a minute or two ... "Sundar" <sundar.dhanasekaran(a)gmail.com> wrote in message news:1175363548.601938.217910(a)p15g2000hsd.googlegroups.com... > Hi, > > I have the check engine light on in my 2000 Toyota Camry. I checked > with a local mechanic for the codes. They turned out to be > > P0125 - Collant temp low (suggested changing the thermostat - cost > $70) > P1143 - B1S1 not shifting (suggested changed 02 sensor cost $185). > > My knowledge on autobilies is limited. I would like to know what the > above codes mean. Change of the parts the only option? I am price > concious so if there is something that can be tried before change of > parts would be very help. > > Any advice would be helpful > > -Sundar >
From: Ray O on 1 Apr 2007 02:07
"Sundar" <sundar.dhanasekaran(a)gmail.com> wrote in message news:1175363548.601938.217910(a)p15g2000hsd.googlegroups.com... > Hi, > > I have the check engine light on in my 2000 Toyota Camry. I checked > with a local mechanic for the codes. They turned out to be > > P0125 - Collant temp low (suggested changing the thermostat - cost > $70) > P1143 - B1S1 not shifting (suggested changed 02 sensor cost $185). > > My knowledge on autobilies is limited. I would like to know what the > above codes mean. Change of the parts the only option? I am price > concious so if there is something that can be tried before change of > parts would be very help. > > Any advice would be helpful > > -Sundar > The Diagnostic Trouble Codes (DTC) tell what circuits to check. P0125 - Insufficient coolant temperature for closed loop operation indicates an open or short circuit in Bank 1 sensor 1 O2 sensor for vehicles without California emissions or an open or short circuit in the air-fuel sensor for vehicles with California emissions. In either case, use a volt meter to check for fluctuating voltage from the O2 or air fuel sensor in the exhaust manifold. If the car has a V6, check the rear bank. Are you sure the second DTC is P1143 and not P1133? P1133 indicates an air flow circuit response problem. The B1S1 you listed above refers to bank 1, sensor 1. Both DTC's point to a problem with the O2 sensor or air flow sensor. Checking with a volt meter will tell you whether the sensor is good or bad, and if it is bad, then replacement is needed. -- Ray O (correct punctuation to reply) |