For example, if the oil gets one quart or more low, that could cause the engine to overheat, and overheating could well cause a misfire. I think the others here a right, this likely has little or nothing to do w/the oil. Generally excessive oil consumption starts around 500-1000 miles per quart. The technician replaced the air fuel sensors on both.
#Toyota diagnostic codes idle code
The DTC format and general code types are. The technician retrieved Diagnostic Trouble Code (DTC) P0171 and P0174 (System too lean banks 1 and 2). OBD II DTCs consist of a five-digit alphanumeric code. Then turn the ignition ON, start the vehicle and let it idle for at least 30. This means the misfire code P0300 represents the same failure on a Chevy, Chrysler, Ford, or Toyota. This type of DTC isnt new, and these are still almost always the best. Especially with the thinner oils new cars spec these days. The diagnostic codes that are required by law on all OBDII systems are standardized and all vehicle manufacturers use the same common code list. If anything, with less oil in the oil pan, it seems like that would cause them to misfire less (although not good for the engine in other ways of course.) 2 quarts in 5000 miles? What’s that? 2500 miles per quart? That is maybe more than normal for a new car, but isn’t considered excessive oil consumption on most engines. I don’t see how the oil being low would cause oil-sensitive plugs to misfire. So that’s another easy to do test at the mechanic’s disposal. If there was any doubt, simply replacing the plugs should make the misfire go away. A visual inspection of the plug electrodes would confirm or disprove this theory straight-away. If the plugs are oil fouled, that could possibly cause a mis-fire. Will it damage the engine further to keep running it, there does not appear to be any smoke coming from the tailpipe.įrom new I got mpg in the 40’s now I am getting 33 to 34 mpg. Is there a spark plug I can use that is not as sensitive to the oil, or should I be looking for a junk yard engine or is it cheaper to have my engine taken apart and repaired. Most auto repair shops charge between 75 and 150 per hour.
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The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. They told me to check the oil often which I do and the engine has never been more than a quart low. The cost to diagnose the P0505 TOYOTA code is 1.0 hour of labor. They said the new type spark plugs are very sensitive to oil burned in the firing chamber, causing the misfire. It is important to complete the entire diagnostic process when diagnosing. Toyota Code P0171 Common Diagnosis Mistakes. Since then I have been getting the oil changed at the dealer where I bought it new and they switched to the synthetic oil, so I asked the service department, why the misfire? Toyota Code P0171 Severity Moderate It is okay to drive your Toyota with P0171 for a short period of time, but driving with this code for an extended period of time can overheat the engine and cause internal engine damage. My check engine light naturally stays on constantly now and the engine also appears to misfire on acceleration also.įor the first 60,000 miles I had the oil changed at various places every 3,000 miles using nonsynthetic oil that was recommended in the car manual. p0420 toyota p0171 p0340 p0171, nissan frontier b2205 obd ii diagnostic body. This article applies to the Toyota Camry (2002-2006). HomeNissan Nissan Select Your Nissans Diagnostic Trouble Code Body Codes. monitors the idling speed and idling air flow volume to conduct idle speed control (isc). The learning value of the idle speed control remains at the maximum or minimum five times or more during a drive cycle.Įxample: If the actual idle RPM varies from the target idle RPM by more than 200* rpm five times during a drive cycle, the ECM will turn on the MIL and will set a DTC.I have about 140,000 miles on my car, a 2006 Toyota Prius that misfires at idle when cold, and for the last 10,000 miles the engine has been using between 1 and 2 quarts of castrol synthetic 5w30 oil between the 5,000 mile oil changes. Toyota Camry 2002-2006: Fuel Diagnostic Guide Fuel Diagnostic Guide white90dx, Doctor J There is a fine line between too much fuel and not enough. Toyota RAV4 Service Manual: Idle control system malfunction. The actual idle RPM varies more than the specified amount five times or more during a drive cycleĢ. The ECM concludes that the idle speed control ECM function is malfunctioning and set the Diagnostic Trouble Code (DTC) if:ġ. The ECM regulates the idle speed by opening and closing the throttle valve using the ETCS. The Engine Control Module ( ECM) controls the throttle motor to provide the proper throttle valve opening angle to obtain the target idle speed. The ETCS is composed of the throttle motor, which operates the throttle valve, and the throttle position sensor, which detects the opening angle of the throttle valve.
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The idle speed is controlled by the Electronic Throttle Control System (ETCS). |P0505 2008 TOYOTA CAMRY code description