Skip the auto shop - Our mechanics make house calls

Q: Have e320 2000 Mercedes Benz getting code p1491 and check engine light on.

asked by on

The check engine light is on and code saying High Refrigr Air Pressure

My car has 117000 miles.
My car has an automatic transmission.

This code is related to the pressure in the AC system and suggests that it is too high. When this happens it is usually a result of some kind of blockage in the system. There is also a pressure sensor located usually on the side of the radiator that when faulty can also cause this code to register. I would suggest having an expert from YourMechanic come to your home to diagnose and repair.

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
  1. Home
  2. Questions
  3. Have e320 2000 Mercedes Benz getting code p1491 and check engine light on.

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: Engine codes detected were P0016 P0017 and P0174.

The codes P0016 and P0017 are related to the crankshaft location and the camshaft location. Check the camshaft position sensor and see if its plugged in. If the wiring harness is in good shape and the wires are plugged in,...

Q: Car won't crank

Hello. There are many reasons why a car wont turn over. A bad starter, a bad connection at the battery or starter, low battery voltage, bad starter relay are just a few. Because of the limited amount of information and...

Q: My nissan xtrail will crank but it wont start. I've bought a starter, spark plugs, fuel filter and a relay.

Your car's immobilizer system has to be functioning properly to start your car. If you suspect that the immobilizer system has been modified, the first order of business is to restore it and that might require consulting the factory wiring...

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...
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...
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.