Skip the auto shop - Our mechanics make house calls

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.

A: This code is related to a faulty throttle p...

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 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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: where is the transmission dipstick located

The 2015 Nissan Sentra is equipped with a CVT transmission. CVT transmissions typically do not have a dipstick and are only serviceable from the bottom of the vehicle via a drain and fill plug. CVT transmissions also require a specific...

Q: Hard start, rough idle, then idles fine, acts like not getting fuel, has new fuel pump

Hello there, thanks for writing in. Many faults will cause a rough starting and lack of power with your 2001 Toyota Corolla. The most likely causes of this are a clogged fuel filter, spark plugs, coil, failed fuel injectors, wiring...

Q: Can shaft position sensor all of the outcomes of the problem

Possibilities: 1 - Simply replacing the camshaft sensor will solve your problem. 2 - If it does not, with the age of the vehicle, there can be a break in the wiring harness to the cam sensor. 3 - If...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.