No engine codes, intermittent hesitation or surging while driving in that speed range
Ever do the 60k mile tuneup? this decade?
if it does run perfect
and only hesitates for a second (you never said when)
you TIP-IN the throttle. and it hesitates for a very short time (1s) and
then catches up (does it) and WOT is good power.(wide open throttle) up a hill
then that is a BAD TPS. Hard to test and ECU never reports
it for one good reason, the ECU thinks the driver is crazy
so ignores it, (some times driving crazy is justified) see?
like passing, and should not be...
the TPS gets worn and it fails to report your fast foot
and the ECU fails to activate Enrichmode,
the Air meters. catch up, and power returns.
i can test any TPS , i have a scope, to see the glitch failures
most shops just replace it on suspicion.
SOURCE: engine light is on ,code P0171, hesitates when start driving
you will need a code reader to turn light off
SOURCE: code p1135 what wrong help,toyota 2000,highlander
That code is specific to the Air-Fuel Ratio (A/F) Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P1135 Trouble Area:
Open or short in A/F sensor (bank 1, sensor 1)
A/F sensor (bank 1, sensor 1) heater
ECM
__________________
SOURCE: engine light,poor acceleration and bucking from engine
The evaporation canister can cause this, so would any vacuum leak. A faulty throttle position sensor or camshaft position sensor would also cause this but it would in the diagnostics most likely.
SOURCE: 2000 toyota corolla hesitates when you hit the gas.
i would check your fuel filter and air filter first if they are dirty then i would change them. and if it still does it then it might be one of the sensors on your throtttle body. like your tps sensor or the iac valve or it could be your mas sensor you can also clean these with some throttle body cleaner and mass air flow cleaner that you can pick up at any auto parts store
SOURCE: check engine light code p420
The "check engine" warning light advises that the vehicle is in "fail safe" mode. That means only some of the car's capabilities are operational, just enough to get you to the nearest service point. You probably should not drive it any further than that. Have your service man download and analize the fault codes from the ECM which will indicate what the problem is. The p420 code appears to indicate a probelem with your 02 sensors and maybe the catalytic convertor. The remedy may be to fit a new convertor but as these are expensive to replace, you may want to wait until the car has to pass an emissions test.
Hello
The engine
and automatic transmission in this vehicles drive train
are fully electronically controlled by a computer called the PCM and
TCM (Power Train Control Module, Transmission Control Module). When a
problem like this or other drive-ability related problems occurs the
computer stores a record of the problem (there are of course some
exceptions to this, like the fuel pump, engine coolant temperature
sensor and MAF sensor for instance) in the form of a fault code in
its memory, to read these fault codes you must have the systems
memory scanned with a special tool. Once the fault code(s) are read
you then must perform the appropriate diagnostic testing to find and
resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL
A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR
HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM
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