Q: Car turns on and off. The brake and the steering wheel gets harder.

asked by on

The light engine turned on a few days ago and I got it scanned saying P0171 which they told me that I needed to replace the intake manifold gasket. I was going to do myself but then I couldn't do it because of the position of the screws. So I was going to buy an extension and then It turned off while driving. And the car has been shaking.

My car has 155000 miles.
My car has an automatic transmission.

Hello, thanks for writing in. The P0171 is an indication of a lean mixture, which can be caused by an air leak in the intake (as you were advised), a borderline engine temp sensor reporting a warmer engine temperature than exists, or a weak oxygen sensor. (There was also a Toyota Technical Service Bulletin which addresses "lean running issues in very cold climates" - #228497.)

If you need assistance with this repair, I would recommend having a rough idle inspection completed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car turns on and off. The brake and the steering wheel gets harder.

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: Q: Power steering not working.

It sounds like your serpentine belt is broken. You can inspect the belt under the hood in front one the motor. If the belt is OK you may have a bad power steering pump. I recommend having a technician come...

Q: Car stalls, have to start from neutral. 1997 Jaguar XJ6

This might be the idle air control valve failing. Since this is one of the electronic engine controls which interacts with the engine management system to control idling specifically, it is a prime candidate for this mode of failure. This...

Q: Steering Issues - 2001 Ford Mustang

Hello, thanks for writing in. The symptoms described are commonly caused by issues with the power steering system. It may be possible that the power steering fluid has run low, or an issue has occurred with the power steering pump....

Related articles

P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.