Check Engine Light. I have p420 P440 and P446 codes

SOURCE: Where is the On Board Diagnostic (OBD) connector on the car.

It is under the dashboard, driver side. White, oblong female connector. One row of pins not as long as the other.

Johnny Massengill

• 345 Answers
• Posted on Nov 15, 2008

SOURCE: obd code p0440 for check engine light on 2000 Toyota Corolla

p0440 code means that the evap system has a leak. This could be caused by a bad or improperly installed gas cap. Either that or the purge solenoid has failed or the canister is plugged and not working properly.

SOURCE: 2001 toyota corolla check engine

Mass Air Flow sensor! Just remove your air filter cover. Go to Auto Zone and purchase some solvent. Spray past the air filter and it should correct the problem. If not, replace the Mass air-flow sensor. This is commonly mistaken for an oxygen sensor. Mine did this and I followed these steps and it fixed the light. BTW, the light stayed on for 5 years before I fixed it. Never hurt anything. It's normally something to do with emissions. Dummy lights. :)

SOURCE: I have a2001 corolla with a code p1071.I was told

This is almost always caused by a failing mass air flow sensor. If you had it replaced with aftermarket you may want to replace with oem to avoild problems. Thanks P0171 Fuel System Too Lean (Bank 1)Possible Causes Setting Conditions Base engine "mechanical" fault affecting one or more cylinders Check for air leaks after the MAF sensor Check for air leaks in the Air Induction system (e.g., in the intake manifold) Check for air leaks in the exhaust manifold and in the exhaust pipes Exhaust leaks located in front of the AFS or HO2S location Fuel control sensor is out of calibration (e.g., ECT, IAT or MAP) Fuel delivery system supplying too little fuel during cruise or idle periods (e.g., faulty fuel pump or dirty, restricted fuel filter) Fuel injector (one or more) dirty or pressure regulator has failed HO2S has failed (it may be contaminated with fuel, silicone or water) Vehicle driven low on fuel or until it ran out of fuel

SOURCE: code P0125 keeps coming up, obd system does not

Hi,

The p0125 code is an oxygen sensor code, the description will say something like" insufficient coolant temp for closed loop operation" the problem is not the coolant temp sensor, the problem is that the signal from the O2 sensor is not within the parameters that the computer needs to go into a closed loop condition, more than likely replacing the O2 sensor will take care of the problem but only if there is not another problem with the engine such as a misfire, vacuum leak or a mechanical problem, from what you've said this doesn't seem to be the case, so before spending a lot of time diagnosing replace the sensor.

Thanks.