Q: OBD code P0501, speedometer dead, hesitation shifting.

asked by on

Recently during a two drive the speedo became erratic even though the RPM remained constant while on the highway. The engine check light was already on due to the up stream O2 sensor needed to be replaced. Next day zero reading on the speedo and hesitation with shift points. Sperdo occasionally showed a reading then fails back to zero.

My car has 180500 miles.
My car has an automatic transmission.

From your description it sounds like either the speed sensor is bad or there is a problem in the wiring of the speed sensor circuit. Your transmission is shifting weird because the car does not know how fast it is going. The tachometer uses another sensor to determine the speed of the engine. A YourMechanic certified technician can come to your location to help you diagnose and repair this issue by performing one or more of the following services:

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
  1. Home
  2. Questions
  3. OBD code P0501, speedometer dead, hesitation shifting.

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: Honda CRV oil change: Valvoline 0W-20 full syn and Mobil1 filter a good choice?

Hello, thank you for writing in. It is perfectly fine, and preferred by some, to run fully synthetic oil in your vehicle. You must make sure it matches the weight rating listed in your owner's manual. While we cannot personally...

Q: Service engine light blinks after 60 miles per hour - 2003 Chevrolet S10

Hello. Since the Check Engine Light is coming on, I usually scan the computer for codes first to see what comes up. The codes may or may not help me to diagnose the problem. From what you are explaining, this...

Q: Honda Accord air filters and oil additives

First to talk about air filters--K&N air filters are lubricated air filters. They have an element in them, but it's got oils in it. So, they do clean quite well and they flow a little bit better. If you have...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.