Q: On slow moving traffic, when i release the brakes, the car has lags for half a second before take off... computer scan shows p2138

asked by on

i had a gear box issue, i replaced it, the car now drives well, but during traffic takeoff while on D, the car hesitates for half a second and then drives on normally, a computer scan showed p2138, it was cleared but the car still has the above problem... what could be issue?

My car has 84000 miles.
My car has an automatic transmission.

This code is related to a faulty throttle position sensor. The throttle position sensor (TPS) is a sensor used to monitor the throttle position of a vehicle. The sensor is usually located on the butterfly spindle/shaft so that it can directly monitor the position of the throttle. This sensor relays the position of the throttle plate (also called the butterfly) relative to your foot’s position on the gas pedal and associates the two in the ECU. The ECU then makes the direction to supply more or less fuel to the motor. When this sensor is not working properly, this can cause intermittent responses when applying the gas pedal. I would suggest having a certified professional, like one from YourMechanic, come to your home to diagnose your Check Engine Light firsthand and replace this sensor as necessary.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. On slow moving traffic, when i release the brakes, the car has lags for half a second before take off... computer scan shows p2138

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: Fuel tank door not locking

The fuel tank door has an electronic actuator that my be stuck in and is not reseting to latch the door after it has been opened. The actuator may need to be replaced or adjusted. I recommend getting it checked...

Q: The interior of the celica wont turn on.

Hi there. It is possible that you have a faulty electrical relay that powers accessories on your Toyota. However, it could also be an exposed wire that is creating a short, which is possibly what's causing those fuses to break...

Q: Will not turn over

Hi, thanks for writing in. In many instances when this occurs, the problem is the actual battery cables themselves. When the battery is "stimulated" with the wrench to the body or other metal components not grounded, it can cause the...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.