Skip the auto shop - Our mechanics make house calls

Q: Transmission in Limp Mode

asked by on

The car is starting up fine, though sometimes it takes longer than usual. The transmission is in Limp Mode, and I am getting codes P0765 and P0700. In addition, when I press the gas pedal, the headlights get brighter.

A: Based on the service information I have, it...

Based on the service information I have, it seems like the most likely cause is an internal failure of your powertrain control module. Your headlights getting brighter when the engine revs higher indicates a charging system problem. The problem is most likely your battery or alternator. I would ask for help from one of the mechanics at YourMechanic to diagnose your car’s loss of power so that you can have this issue repaired soon.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: The front breaks have gone out and I don't know if the back is bad too. The carb also has several problems including bad needles a

You should have front and rear brakes checked for thickness to see if they are in need of replacement. You should also have an expert check the carburetor as it may have problems with dirt of debris clogging the jets....

Q: Gear independently shifted into neutral - 2005 Chevrolet Suburban

This sounds like it could be a transmission control issue. Faults codes should be read out and any issues corrected. Generally, if there is a mechanical condition in a transmission the symptoms will be static and always present where an...

Q: Can a bad thermostat cause me to have to keep putting coolant in my car?

Hi, thanks for writing in. The thermostat in the engine cooling system is a valve that opens and closes as engine temperature fluctuates. The purpose of the valve is to keep the engine operating temperature at a relatively constant, optimal...

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...
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...
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...