Q: Check engine light is on

asked by on September 26, 2016

The car has gone 22,000 miles so far. The dashboard is showing the check engine light on. The Automatic feature of the car reads codes. The error code popped up indicating boost pressure sensor. What is this and do I need to replace it?

Check Engine Light is on Inspection $94.99 - $114.99 Get a Quote

Yes, this needs to be checked out and the boost pressure sensor replaced if it has failed. Your engine is turbo-charged, which means an air pump, driven by exhaust pressure, may force more air into your engine to achieve more power when you need it. The boost pressure sensor monitors how much additional air pressure is being given to the engine and reports this to engine management. Engine management limits how much pressure the engine gets to avoid engine damage from over-heating after extended high-pressure use as one case. A bad sensor could cause damage to the engine, or cause the engine to go into "Limp" mode, where power is severely limited. If you would like to have this checked, a qualified professional from YourMechanic can come to your car’s location to diagnose and address the Check Engine Light.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Brake light switch stuck.
From what is sounds like, your brake lights constantly appear to be on. It's not uncommon for aftermarket parts, such as brake light switches (https://www.yourmechanic.com/services/brake-light-switch-replacement), to fail prematurely. I would have a certified mechanic like YourMechanic verify the problem (https://www.yourmechanic.com/services/brake-light-is-not-working-inspection)...
Car making clicking sound at startup
Hello. It is important to consider whether the noise is heard when you are trying to start your vehicle, or when the motor actually starts. If it is before the motor starts, then the issue is most likely a low...
Fuse keeps popping in car
After looking at the wiring diagrams for your car, I cannot find any 30 amp fuses in the fuse box location you describe. I see all different sizes up to an 80 amp. Most big ones are 40 or 50...
Advice on how to become a mechanic
I learned from my grandfather who was a mechanic. I started when I was 14, but he wouldn't teach me anything, he'd only let me watch. Over time I practiced and figured things out myself. Today, you can learn a...
Won't start after driving uphill and oil pressure light came on.
It sounds like you blew a head gasket or broke the timing belt. Over revving the engine in second gear may have caused the timing belt (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-timing-belt) to break. It will not start and this is an interference engine that...
The VVT solenoid
Hello. It may be possible to access the solenoid from within the motor, however that would require disassembly of the engine, or at least the valve train. You may be able to access it by removing the valve cover. Regards,...
Where does the vent line from front of the gas tank go?
Hi, thanks for writing in. The vent line or EVAP tube the comes from the gas tank is typically routed to the intake manifold. The intake manifold is where the air is mixed with the fuel before it reaches the...
Car is idling up and down while either parked or when driving.
Hi there. I believe O'reilly's sold you an IAC (idle air control valve) from the description you have given. OEM is the acronym for original equipment manufacturer. Seems odd that it was only fixed for a couple of hours. Sometimes...
I have a new battery but my car won't start
The solution will depend on the symptom you are observing as you try to start the car. I recommend a no-start diagnostic (https://www.yourmechanic.com/services/car-is-not-starting-inspection) which will identify the root cause. There are a lot of possibilities but if the engine does...

Related articles

P0083 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 1 Sensor 2)
P0083 P0083 code definition P0083 is a general OBD2 code indicating a issue with bank 2 intake valve control solenoid. This code may be seen with P0081 and P0082. The vehicle also has a bank 1 valve control solenoid. What...
P0515 OBD-II Trouble Code: Battery Temperature Sensor Circuit
P0515 trouble code means there is an issue with the battery temperature sensor circuit often caused by battery corrosion or engine overheating.
P0417 OBD-II Trouble Code: Secondary Air Injection System Switching Valve B Circuit Shorted
Trouble code P0417 means the PCM has detected an issue with the secondary air injection system, often due to a faulty air pump.