Q: if my transmission fluid was filled a quart over could this cause my reduced engine power light to come on?

asked by on

oil can henry's filled my transmission fluid a quart to high. i drove around not knowing this until my next scheduled oil change. now my reduced engine light is on and when i push the gas pedal it will only reach 2000 rpm's. what is the issue, and could the overfilling of the trany fluid cause this problem?

My car has 114000 miles.
My car has an automatic transmission.

Hi there. Usually the reduced power light is caused by an engine component failure, like the throttle body, TPS or bad O2 sensors. It is very possible that the additional transmission fluid has created a trouble code that might have activated a Limp Mode setting for your Chevy. When the internal engine or transmission sensors determine a fault exists inside the transmission (which can be triggered by too much hydraulic pressure due to excessive fluid), it tends to create a limp mode, so you can slowly drive the vehicle to a repair facility. Two things can be done to resolve this issue. First, flush the transmission fluid and change the filter first. Second, a professional mechanic will need to complete a reduced engine power light inspection to deactivate the limp mode; which should resolve this problem. If that doesn’t work, a detailed inspection might be warranted.

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. if my transmission fluid was filled a quart over could this cause my reduced engine power light to come on?

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: Stalls then dies.

Hey there, thanks for writing in about your 1999 Chevy Lumina. The problem sounds like your fuel pump is going bad and getting worse over time. In order to verify the problem the fuel pressure would need to be checked...

Q: My 2008 Pontiac G8 GT has a collapsed lifter, and i want to have contact with a mechanic experienced in rebuilding Gen IV LS motor

California guidelines prohibit the modification of the camshaft that you are contemplating. Consequently, anyone in California who is actually a knowledgeable engine specialist is not going to do this kind of work because it would be flat out illegal. There...

Q: Best motor oil for a 04 bmw 325ci ow40w or 5w40w full synthetic

The difference between these two oils is primarily the viscosity or thickness of the oil. Depending on the brand, there may be a number of other additives in play as well, however the most important component of the oil is...

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...
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...