Skip the auto shop - Our mechanics make house calls

Q: Check engine light is on

asked by on

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?

A: Yes, this needs to be checked out and the b...

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.

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!

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: Bad clutch

If the clutch is slipping, then a new clutch will most likely need to be installed. The flywheel will need to be inspected and possibly machined, if there are gouges or hotspots. You may want to enlist the help of...

Q: can garage fix my car

If you got to a minor accident, you should have the car checked by a local body repair shop. The shop will need to quote all of the repairs needed to bring the car back to working condition. Cost for...

Q: Why is the window lock light stuck on in my 2015 Mercedes CLA250 keeping my windows from rolling up

This is typically caused by a programming issue in the control module for the windows. Most of the time the module just needs to be reprogrammed by the dealer. In some cases this can be caused by debris if some...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...