Q: Fuel consumption issues after crankshaft position sensor reset

asked by on December 25, 2016

The dealership relearned the CKP after I took my 2009 Honda Accord in b/c of the malfunction and VSA lights coming on. It was running roughly and wouldn't accelerate properly when I pushed the accelerator. The next time I turned the car on, both lights came on again. The 2nd time I started it only the malfunction light came on. The 3rd time both lights didn't turn on. Yesterday I took a 110 mile trip and noticed that after 116 miles on a full tank of gas that I am almost at empty. I usually get over 375 miles / tank. Is this all related? Could it be that just the fuel gauge is off? I've never had any of these problems before and the technician told me he didn't know what caused the error message in the first place.

My car has 119215 miles.
My car has an automatic transmission.

Hello. If your lights are coming on and off then there may still be an issue somewhere with the vehicle. If there was a recent reset due to an issue with the crank position sensor it may be possible that the issue has returned or is still affecting the vehicle. The crankshaft position sensor plays an important role in the engine management system’s calculations, and a problem with it can cause all sorts of issues, including a decrease in mpg. If the light returns I would have the vehicle scanned for trouble codes to determine if that may indeed be the issue. Similar symptoms can also be caused by many other things, such as a problems with the fuel, ignition, or elsewhere in the engine management system, perhaps related to wiring. I would start by checking the crank position sensor as there was a previous issue with it that set off a warning light. As the possibilities could vary widely, if you are unsure, I would recommend having a professional technician, such as one from YourMechanic, visit your location to determine if the crankshaft position needs to be replaced.

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

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

Engine not firing

Hello, thanks for writing in about your Ford F-150. You will need to scan the computer to see if there is codes for the crankshaft or camshaft sensor. If you'd like to have this fixed, consider YourMechanic, as a certified...

How often to change the oil

Most of the time you will want to go with the manufacturer's recommendation for oil change intervals. However, if the oil change interval is a very high number such as one with five digits, I certainly dont think it would...

Engine start and open its oil cap its get dancing on that means air pressure come is it OK or some problem

Hi there. Anytime you start the motor, the oil cap needs to be kept on tight. The cap is responsible not only for keeping oil from spilling and escaping, but most importantly, maintaining a consistent vacuum pressure inside the motor....

Related articles

Honda Certified Pre-Owned (CPO) Car Program
If If you have been shopping for a used Honda vehicle, you may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on...
How to Buy a Good Quality Crankshaft Position Sensor
Just Just like the name indicates, the crankshaft position sensor monitors the rotation speed and position of the crankshaft. The crankshaft is what turns the engine’s piston power into a force that can actually move the vehicle. Its position must...
How to Replace a Camshaft Position Sensor
Camshaft position sensors determine the position of the camshaft in relation to the crankshaft to control the fuel injector.