Diahatsu YRV Engine system Code P1346

it will be either 8mm or 10mm more likely 10mm

I look up your code. Meaning of code is vvt sensor range/performance problem bank 1

possible causes
faulty variable valve timing vvt sensor
variable valve timing sensor harness is open or shorted
variable valve timing sensor circuit poor electrical connection
engine control module

Well the obvious answer is that the auto transmission has a problem. The normal diagnosis would be the solenoid that engages 4th gear is faulty and the vehicle stays in 3rd gear. So you have to know the diagnostic code that comes up in this condition.

But just as a precaution first check if the engine coolant is at right levels and thermostat is functional. Sometimes fault in engine cooling system can also lead to the O/D light (over drive) coming up.

To get some details on how to check the diagnostic code you can refer to
http://personal.utulsa.edu/~nathan-buchanan/93fsm/autotrans/31diagnosi.pdf

If you are unsure it is best to take the vehicle to an auto transmission specialist (not the Toyota service place) and get it checked. By the way should not be anything to worry telling your dad. It is nothing that you could have caused. Simple vehicle mechanical issues.

depends on car-computer systems vary--getta data stream done-it gives values to pinpoint solution--bring it to a shop with factory eqipment -no cheap code reader like a partsplace or dealer

Mine turns out to be lambda sensor...

The standard description of Diagnostic Test Code (DTC) U0156 is "Lost Communication With Information Center "A"" This is a computer network fault. It could be due to a failed module or loss of power to the module. There may also be other faults in other parts of the system. If you are getting this code from the engine control module, the entire computer network in your vehicle needs to be tested/diagnosed. Many components can be affected by a single module that cannot communicate because several of the modules share the same data in order to make your vehicle function properly.

the p1346 code is deviation in crankshaft position and v v t i sensor signal.... chances are you're timing is worn out and will need to be replaced. sorry to say but this job is not for the diy (do it yourselfer) and again sorry

Definition of Diagnostic Trouble Code P1346 Audi: Ignition Coil Power Output Stage 3 Short to B+ BMW: Misfire During Start Cylinder 3 Buick: Intake Camshaft Position [CMP] Sensor System Performance Cadillac: Intake Camshaft Position [CMP] Sensor System Performance Chevrolet: Intake Camshaft Position [CMP] Sensor System Performance Ford: Fuel Level Sensor B Circuit GMC: Intake Camshaft Position [CMP] Sensor System Performance Lexus: VVT Sensor Rang/Performance Problem (Bank 1) Lincoln: Fuel Level Sensor B Circuit Mazda: Fuel Level Sensor B Circuit Mercury: Fuel Level Sensor B Circuit Oldsmobile: Intake Camshaft Position [CMP] Sensor System Performance Pontiac: Intake Camshaft Position [CMP] Sensor System Performance Saturn: Intake Camshaft Position [CMP] Sensor System Performance Toyota: VVT Sensor /Camshaft Position Sensor Circuit Range/ Performance Problem (Bank 1) Volkswagen: Ignition Coil Power Output Stage 3 Short to B+

okay.how would the injectors have anything to do with the vehicle stability control/4wd.??if it were injectors at such a low mileage you would feel a real lack of power.now as toyota own diahatsu you could save yourself a fortune if you ask them to diagnose a fault!!to check vsc is working put car in 2nd and floor the pedal turning as tight a circle you can brave.it should stop the inside wheels from screaming....to check 4wd do the same and you will feel the car trying to pull itself apart.you will see what i mean.!!!

P1346 is the code for:
VVT Sensor /Camshaft Position Sensor Circuit Range/ Performance Problem (Bank 1)
If the code came on just after the timing belt replacement more than likely the sensor was damged in some way during the work. The sensor is located in the same area the mechanic was working in while changeing the timing belt. You should have this checked right away. A faulty cam sensor can also lead to the vehicle not starting.