Q: Power train light

asked by on

in February 2014 i had my transmission replaced, in August 2014 the engine was replaced. a few weeks ago the powertrain malfunction light came on, pulled over turned the car off and then the car restarted with no issue and no warning light. a couple of days went by and it did it again, again was able to restart the car with no issue and no warning lights. did it again, this time took it to a a mechanic and they kept it 4 days, but never had the issue, the day after picking it up it happened again. 3 days ago the check engine light came on, and today i got the powertrain malfunction light, pulled over and was able to restart and continue to drive with no issue. stopped by Advance Auto and had them scan got error code p1450. would this cause the powertrain malfunction light to come on? or what

My car has 229000 miles.
My car has an automatic transmission.

Hi There, Code P1450 relates to the EVAP system in your vehicle and us unrelated to the power train malfunction you are referring to. Your car has a small purge valve with a purge solenoid in the Evaporative Emissions system that controls the venting of fumes from the fuel tank as these fumes build up inside, particularly when you are refueling the car with gas. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors in the charcoal canister. The charcoal canister is filled with activated carbon pellets that can absorb the fuel vapors. When the engine is running, the fuel vapors are purged from the canister and burned in the engine. The vent control valve (solenoid) controls the flow of outside air in and out of the charcoal canister. The vent valve is controlled by the engine computer (PCM). Normally the vent valve is open. It closes when the engine computer tests the EVAP system for leaks. If a leak in the EVAP system is detected, the Check Engine light will illuminate on the dash and the trouble code related to the problem will be stored in the engine computer. When an air leak is present in the EVAP system, the MAP sensor will not be able to determine the air density, and the MAF sensor will not be able to determine the volume of air, entering the engine correctly. This will lead to an over fueling situation or an under fueling situation depending on the size of the air leak and engine operating speeds and load. This may eventually lead to catalytic converter problems as well as misfiring problems.

The power train warning light generally will come on when the computer has detected a fault within the transmission control system. When this happens, the transmission control system puts the vehicle into a "limp mode" which helps to prevent further damage to the engine or transmission by reducing the load put on it. This may mean many different things such as a faulty transmission control module, a faulty transmission shift solenoid or possibly a bad transmission speed sensor. I would suggest having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

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. Power train light

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: Car went into limp mode after putting gas

The check engine light indicates that there is likely something wrong with the engine or transmission in your vehicle and will usually come on in conjunction with the vehicle going into the reduced power mode. This happens when the vehicle...

Q: Where is the A/C compressor low pressure side service port?

Hello there, the answer to this problem is a bit complex. When the system is low on refrigerant, in more cases than not, there is a leak that is causing the low levels. Simply adding refrigerant may only work for...

Q: My car idles high and bogs down when I hit the gas

Typically a high idle issue is caused by a bad idle control valve or a vacuum leak. When you apply pressure to the throttle and it bogs down, that tends to also be a vacuum issue. Some of the components...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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.