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?
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. 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: Soft brakes make me think they won’t work

Any unusual braking occurrences should be viewed as potentially serious. However, the symptom you describe is more indicative of a common issue Toyota had with the Tundra, causing them to issue a on it. It has to do with replacing...

Q: Thrumming and vibration under feet when driving

Hi, thanks for writing in. The noise and vibration you sense could be engine vibration passing direction directly into the body of the car. This normally should not occur, but it can happen when engine mounts or a transmission mount...

Q: Check Engine Light and code for O2 sensor

Hello. Knowing the actual code number would help determine the problem. If you are getting an O2 sensor code associated with the way it is running, then the sensor is more than likely bad. On this Toyota, the O2 sensor...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
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...