Skip the auto shop - Our mechanics make house calls

Q: Fluctuating RPM gauge when going up hills

asked by on

When ever I go up a hill my rpm gauge goes up and down and all my sensors on the dashboard light up. When I pull over and turn off the car for a few minutes everything is fine. I took it to the dealer twice and they replaced the chip 2 times, and they still can't find the problem. Do you have any ideas about what could be wrong?

Hey there. It’s hard to tell without further information. Automatic transmissions rely on solenoids and electronic sensors to shift. If these sensors have failed, the symptoms would be similar to yours. Issues with your fuel system will also produce similar symptoms. The best way to check is to have a scan tool plugged in while you experience the issue in order to diagnose this properly. There are several sensors that could also be the problem. These again are easiest to diagnose using a scan tool. For more assistance, have a local professional, like one from YourMechanic, inspect the relevant systems in order to make proper 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Fluctuating RPM gauge when going up hills

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: Warning lights and PO344 Camshaft Position Sensor

This vehicle came with three different engines and they all have different directions to replace the sensors. The sensors also may have specialized removal and installation procedures that require special tools for the seals and sensors. The code P0344 is...

Q: Truck misfires when the engine warms up - 1995 Chevrolet C3500

If the heat sensitivity is a good clue, this could well be the ignition control module, which is quite heat sensitive on the big block Chevy's. Would check fuel pressure (while running) as well to make sure you're getting enough...

Q: Insert the key go to start everything. Goes blank releas back on battery is good starter also possible neutral safety switch or ig

Hello, thank you for writing in. Looking into and testing your ignition switch is the next step of your diagnostic process. If you have a voltmeter, you can test for voltage on particular terminals and see if the ignition switch...

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...