Skip the auto shop - Our mechanics make house calls

Q: Truck shut off while going down a hill

asked by on

My check engine light never goes off. When I go over 55 for a constant time the check engine light blinks. When coming down a hill towards a stop sign today the truck shut off and would not start back up. It's never stalled or sputtered before. All electronics still work and truck tries to start. Sounds like it is out of gas even though it is not. Wasn't sure if it was possibly a crank shaft sensor or fuel pump. Input is appreciated.

My car has 170000 miles.
My car has an automatic transmission.

A: A full diagnostic would be needed to identi...

A full diagnostic would be needed to identify the issue. A key to that effort will be reading the diagnostic trouble codes that have set the Check Engine Light on.

With those codes and a few quick tests, it should then be relatively easy to find the fault. In particular, the crankshaft position sensor should be tested for functionality.

If you suspect the fuel pump has gone bad or has totally failed (or if it has beed disconnected due to a wiring/terminal fault), you can check its condition by having an assistant turn the key to the "On" position as you listen back at the tank for the characteristic noise. There is a momentary "whirring" sound that the tank pump will make as it turns on and pressurizes the fuel system prior to ignition. If there is dead silence at the instant the key is turned "On", then there is an problem with the circuit or the pump itself.

If you would like to have the stalling problem diagnosed by an expert, a certified technician from YourMechanic can come to your car's location to inspect the issue and move forward with repairs.

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: Tail gate won't release

Hey there. The rods connect to the center control handle using plastic clips and these clips or the handle breaks. You will need to have a mechanic remove the inner tailgate cover to gain access to the latch handle and...

Q: Coolant is boiling

You need to check to see if the thermostat is opening properly and if the cooling fan came on. The upper and lower hose should be hot if it is open. If this is your first time running the car...

Q: Fuel pump issues

Hello. There are a couple possibilities including the fuel issue you have mentioned. If you spray additional starting fluid in the intake and it runs longer, then that's a clue that fuel starvation is the problem. See if you can...

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...
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...
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.