Skip the auto shop - Our mechanics make house calls

Q: Wrench light came on truck has no power and the rpms constantly get higher if put in park

asked by on

Got in truck after work and cranked it up went to pull out of parking lot and truck had no power a wrench light came up on dash and if put in park the rpms climb slowly took to auto zone and wasnt showing any codes if the truck is in motion and you put in nuetral turn the key off and then fire it up again it gain power for a second or two and then goes right back to limp mode

My car has 126990 miles.
My car has an automatic transmission.

A: Hi there: The wrench light is service ligh...

Hi there:

The wrench light is service light indicator that alerts the driver that maintenance or service is due for a component. Most of the time, scan that Auto Zone will complete uses a basic scan tool, which does not factor or is unable to download all stored codes in the ECU. Anytime the vehicle goes into limp mode, an error has been detected inside the transmission or with one of the electrical sensors or components that are critical elements of the transmission system. It's probably a good idea to have a professional mobile mechanic complete a check engine light is on inspection; even if the light is not activated, any stored codes caused by the transmission limp mode activation will be accessible and should pinpoint the source of your Ford Super Duty's issues.

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Timing issues? Weird noise when accelerating.

Hi there. Although it's true that faulty or incorrect ignition timing will impact how smooth an engine runs, other issues like mass air flow sensors, O2 sensors and crankshaft position sensors can also cause similar symptoms. The best way to...

Q: How do you operate the sun visors?

Your car is equipped with two sun visors – one for the driver and another for the passenger. They’re designed to help you combat glare from the sun, making driving safer for everyone involved. Here’s how to use them: ...

Q: Truck starts then immediately dies

Hello, thanks for writing in. Most of the time this is caused by a fuel system issue. I would usually start by installing a scan tool to see if there are any codes in the computer pertaining to this problem....

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...