Skip the auto shop - Our mechanics make house calls

Q: My 2009 Toyota avanza A/T hits strongly when I kickdown the accelerator at 50km/h and the engine light comes on with a code p1706 for engine torque malfunction.

asked by on

I made an engine overhaul last month. After the overhaul my car is fine but when I kickdown the accelerator, and the reach 50 or 60 km/h the automatic transmission hits strongly and the check engine light came on and the accelerator died when I kickdown again .... When I read the transmission DTC by my launch tool , it read p1706 engine torque malfunction ... When I turn the key off and then turn the engine on again the DTC cleared itself

My car has 200390 miles.
My car has an automatic transmission.

Hi there. This code is coming up for the transmission having an issue with the kickdown. There could be two things that would be wrong. Either the kickdown solenoid has failed in the transmission or the torque converter clutch solenoid is sticking. Check the transmission for fluid level and make sure that it is full. Check the harness to the transmission and make sure that it is tight and secured. If you had the engine off the transmission, it is quite possible that the seals on the input shaft to the transmission has split. The first seal on the input shaft is to seal the torque converter clutch. I recommend back tracking what was performed on the vehicle and then go from there. If you need further assistance with your vehicle, then seek out a professional, such as one from Your Mechanic, to help you with the harsh kickdown during heavy acceleration.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • My 2009 Toyota avanza A/T hits strongly when I kickdown the accelerator at 50km/h and the engine light comes on with a code p1706 for engine torque malfunction.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Van overheated, leaked, engine shut off

Hi there. This could be a variety of things related to the cooling system for your 1995 Toyota Previa. Since you just replaced the thermostat, we can theoretically rule this out. You may also want to check the coolant fan...

Q: Car makes a medium pitched whine or growl in sync with rpms.

If you are hearing the noise at idle when the car is not moving, generally the noise you are describing originates in the engine, the transmission (torque converter runs even at idle), and/or the accessory drives. However, if there is...

Q: My car enters all gears but after driving for 4 mins it does ( not ?) enter drive again but reverse only. Is it the oil used? 2007 Toyota Camry

Hello - first task is to check the transmission fluid level and quality. I believe this transmission is designated as "lifetime lubricant", which really means you should seriously consider changing fluid and filter at 100K miles at least. You could...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...