Q: Check engine light is on 2014 chevy impala..Auto zone said it was the rocker arm..the chevy dealer said it was the throttle body..

asked by on August 01, 2017

My question is simple.I have a 2014 chevy Impala..the check engine light is on..Auto zone quoted a Rocker arm issue.The Chevy dealer reported a throttle body issue..What would cause the check engine light to come on.and how would I get it repaired?

Generally, the check engine light comes on when something fairly serious is going on with the vehicle. This can happen for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a bad catalytic converter, bad spark plugs or spark plug wires and many other reasons. Due to the wide range of possibilities for the check engine light to come on, the best and most efficient way to narrow down the scope of what may be causing this is to have the vehicle hooked up to a scanning tool to download any potential fault codes that may have registered in the computer. This will allow a mechanic to determine more specifically what to look for in diagnosing your vehicle. I would recommend having an expert from YourMechanic come to your location to take a look at your vehicle to determine what may be causing your check engine light to come on.

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

P0171 after oil change

To answer your question as to the cost, it depends on exactly what is wrong. As described below, there are many underlying malfunctions that can cause diagnostic trouble code P0171. Typically, a diagnostic is performed, the exact cause is pinpointed,...

engine struggles turning over and rpm don't move from 0

It sounds like you have both a stalling issue and difficulty starting but if the car is dying immediately after starting and you keep trying to restart it, that alone will cause the battery to discharge and explain the no...

How do I adjust the power driver’s seat?

The power driver’s seat is adjusted with the three power seat controls, which are on the outboard side of the seat. The seats can be adjusted in five different ways: You can adjust the position of the seat with...

Related articles

A Buyer’s Guide to the 2012 GMC Sierra Hybrid
When When you buy a truck – even a half-ton truck like a GMC Sierra 1500 – you expect to make a trade-off between hauling capacity and fuel efficiency, right? Well, the designers and engineers at GMC don’t think that...
P0304 OBD-II Trouble Code: Cylinder 4 Misfire Detected
P0304 code definition P0304 is a diagnostic trouble code seen when a misfire is detected in cylinder 4. This code may...
How to Clean Your Catalytic Converter
Before looking into a catalytic converter cleaner, check it for clogging, internal part damage, and poor fuel economy.