2 trouble codes in morning P0111 P2100

Hi Keith,

Interestingly, I do not find those exact DTC in the Toyota repair docs. What device are you using to retrieve the DTC?

Assuming that the DTC relate to the mass air flow sensor and the throttle body, you might try using MAF sensor cleaner on the MAF, and throttle body cleaner on the throttle body interior and throttle plate.

 

http://priuschat.com/forums/gen-ii-...roubleshooting/56274-story-two-dtc-codes.html

 

Yes, in the section of the manual where the code is defined, it will give the conditions where the code may be cleared if the fault is gone. Typically it will say something like "Duration = 2 driving cycles" which means that if the fault is not there for 2 driving cycles, the MIL (malfunction indicator light aka Check Engine Light) will go off. Some codes do not have this info.

 

When the car is IG-OFF, can you freely rotate the throttle shaft by turning the spring-loaded shaft with your hand?

If not see, if you can clean off the throttle shaft with the throttle body cleaner. If you still have a problem you might have to replace the throttle motor.

Or you might visit your Toyota dealer and see what DTC the tech can pull. Maybe that will further narrow down the problem.

 

Yes, the codes that you retrieved are not "real" Toyota DTC and apparently are an artifact produced by your scanner. The real codes might provide more insight into your car's problem.

I think that throttle body cleaner has lubricant in it, while MAF sensor cleaner is not supposed to leave a residue. So you may want to lubricate the shaft with throttle body cleaner.

However, if the throttle shaft is freely rotating then a stuck shaft is not the source of your current problem.

Maybe you should see what DTC the Toyota dealer tech can retrieve. Then you can decide whether the repair is DIY or not. Good luck.

 

Make sure all the various connectors around the TB are hooked
up firmly -- the MAF/IAT on the front, the TPS underneath, and
the wiring to the motor. You should hear the motor PWM buzzing
when the car's powered up and the engine not running, and feel
it fight you if you try to gently move the butterfly. Try
wiggling the motor wiring [there are 2 connectors inline heading
to it] while listening carefully to the PWM to see if you hear
any connectivity drops.
.
When you cleaned the TB, did you actually take it *out* of the
car [note that there's a coolant loop to deal with] and open it
up and fully lube everything? As Patrick notes the shaft and
its gearing really needs to not be sticky, and if the car's
been in a dirty environment it's possible the little geartrain
under the motor housing has gotten dried out / crapped up and
wants a little TLC. If nothing else, put a drop of 90-weight
gear oil into each pivot point where the shaft attaches to the
butterfly and work it back and forth and let it soak sideways
into the sleeves.
.
It is possible to do all this without breaking the coolant loop;
you can unbolt the TB and raise it up to the limit of the hoses
and it's enough to service. Have a spare gasket on hand if the
old one gets ripped up. If you muck with the TPS screws make
sure you get the pot *exactly* back in the same position because
it does NOT auto-learn. If the paintmarks are gone make new ones.
.
_H*

 

Now that Hobbit's entered the fray, take a look at his website where he disassembles and restores to good working order a Prius throttle body: http://www.techno-fandom.org/~hobbit/cars/tb/

 

Patrick,
My 2005 has 450K miles and I now have a P0111 that repeats after clearing it and another code that I did not read. I'm using a GoPoint cable to my iphone and golink app. They list P0111 (FUZZYLUKE.COM) as a intake temp sensor error. I recently had a inverter water pump replaced under recall. Perhaps they did not fully reconnect my temp sensor. I'll locate it and check if signal is open or sensor can be replaced. I do see air intake temperature reading. I'll check out your path as an alternative.
Pat M.

 

There should be no need to disturb the mass air flow sensor when the inverter coolant pump is replaced. You might check the wiring harness connection to the MAF sensor. If it is secure, then remove the sensor and clean with MAF cleaner.

 

Wow!!!! Please consider posting a quick note for us in the http://priuschat.com/forums/gen-ii-prius-main-forum/79235-299-999-mile-club.html

The intake air temp sensor is part of the MAF sensor, mounted on the air intake. Look there for loose/broken/disconnected wires. Or you may need to clean the MAF sensor and the air temp thermistors. Or replace the sensor entirely.