Q: P0755 & P0700 error codes

asked by on August 12, 2016

Car has never had transmission problems but is in 2nd gear limp mode after hitting brakes in rush hour traffic. 2 days before I replaced 2 tires on car. Used tires no balancing. Several months ago I had a fuse blow under hood in the power distribution center. I frequently replaced the 20 amp yellow fuse in cavity 8 to start the car. That is recent history. I am not willing to replace/rebuild transmission. I will trade In if so. What is the most likely fix and cost of that fix in this scenario? Or is it new car time? Thanks!

My car has 133000 miles.
My car has an automatic transmission.

The problem with buying used tires and not having them balanced is the potential problems they can cause.

Most transmissions - or more specifically, the Powertrain Control Module (PCM) which controls the transmission and drive line - contain incredibly tight tolerance standards in regards to wheel speed, which, when combined with engine RPM, controls shift points. If two tires are not equally-sized (and this could be as minimal as 1/4" of total circumference), it could trigger the 2nd gear limp mode, along with the P0700 generic trouble code.

There are two things you should do before thinking about selling your vehicle:

  1. Verify that the two used tires you bought are of the same manufacturer and style, and have tread depth readings within 2/32nd’s of each other on the front axle.
  2. Have a qualified mechanic inspect the issues you’re having with the blown fuse; an electrical short could be triggering many of these warning lights.
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

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

Car stopped moving suddenly, gears stuck

Hello there. This type of fault is not uncommon. There are a few different faults that would cause this on your 2000 Cadillac Catera, but since the engine runs properly the fault most likely lies with the transmission in some...

Jeep 2014 Patriot Throttle Body

Hello. Diagnosisng the issue from here will take some trial and error. You should look into having the mass airflow senor checked. This sensor is responsible for telling the computer how much airflow is coming into the engine. The codes...

04 impala overheat changed waterpump n thermostat still overheat now stop running

At 200 thousand miles, the overheating could really be just about anything. But if you drove the car while it was overheating, there may have been some damage done that is causing your starting problem. Common causes of overheating are...

Related articles

How Do I Take Care of My New Tires?
You’ve You’ve equipped your car with a brand new set of tires, replacing the old set of worn out rubber. They were noisy, and every time you had to brake hard, you were losing traction. Now you’ve spent your hard-earned...
How Do I Take Care of My New Tires?
You’ve You’ve equipped your car with a brand new set of tires, replacing the old set of worn out rubber. They were noisy, and every time you had to brake hard, you were losing traction. Now you’ve spent your hard-earned...
Symptoms of a Bad or Failing Shock Absorber
Common signs include vibrations while driving, swerving or nose diving when braking, longer stopping time, uneven tire wear, and leaking fluid.