Q: Transmission in Limp Mode
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.
Recommended Services
| Loss of power Inspection | $94.99 - $114.99 | Get a Quote |
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.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
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
What others are asking
Gasket or main seal leaking oil.
There are dozens of places where oil leaks can originate. The rear main seal and head gasket are just two of the possibilities. I suggest you have dye put in the oil system to determine where the leak is coming...
Engine missing
Misses generally are caused by failing ignition components like spark plugs, ignition coils, ignition wires, etc. But, every once in a while a component like an injector, or a valve spring can fail and cause a misfire similar to an...
Engine overheats when I stop
If the fans failed completely, they would likely not turn on at all, even when the car is first started. The fans are controlled by coolant temperature sensors that monitor the coolant temperature, and if one of these temperature sensors...
Car won't start and doesn't have normal power
Thanks for writing in today about the issue with your Saturn. Without being there to physically inspect the car, it's very hard to give you a precise diagnosis, but one common problem that occurs when people install accessory items like...
Engine fault reduced power
It sounds like you could have a sticking boost pressure actuator. Unfortunately, YourMechanic does not work on your model vehicle. I suggest having the dealership take a look at it.
Misfire in number 4 cylinder
If the injector tests good, I would check the voltage at the connector and check for a good ground signal from the PCM. This is often done best with a noid light. They can be purchased from most auto parts...
Misfire - 2003 Ford Expedition
Hello and thanks for your question. When diagnosing a misfire (https://www.yourmechanic.com/article/how-can-problems-with-the-ignition-system-cause-misfiring_2), you would need to determine all of the factors for what could be the problem. When you mentioned that you had switched a coil out from another cylinder to...
Heater not working 2005 Acura TL
Hello - you may have a bad water pump (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-water-pump) and clogged radiator. When engine overheating occurs at low engine speeds, it indicates the engine is unable to transfer heat to the radiator and cool the engine. It would also...
My 2003 Acura MDX Doesn't want to start it cranks the light in the truck will turn on. The battery light, check engine and oil lig
Hi There, This may be related to many different possibilities, some of which may be related to a lack of spark or possibly timing issues and some of which may be related to a fuel delivery problem or a combination...
Related articles
How a Manual Transmission Works
A A manual transmission helps a vehicle achieve a desired speed through the use of gears, a clutch, and a shifter. It works like this: when the driver wants to shift gears, he or she pushes in the clutch pedal...
What Causes a Car to Stall?
You trust your car. You may not think about it, but you believe that certain functions will occur without fail. You may be aware...
Symptoms of a Bad or Failing Transmission Oil Pressure Switch
Common signs include the vehicle entering "limp" mode, having difficulty shifting, and its engine RPM being higher than it should be.
Browse other content
Estimates
Maintenance