P2229 OBD-II Trouble Code: Barometric Pressure Circuit High

P2229 code definition

Barometric pressure circuit high

What the P2229 code means

This trouble code indicates that the powertrain control module has detected a pressure that exceeds the manufacturer’s threshold of acceptance in the barometric pressure circuit.

What are the causes of the P2229 code?

Some potential causes of this trouble code would include:

• An engine that is running very poorly such as one that is misfiring or stumbling

• Clogged catalytic converters

• A faulty mass airflow, manifold absolute pressure, barometric pressure, or throttle position sensor may exist

• A faulty powertrain control module

• Damaged wiring or connectors that are associated with this system

What are the symptoms of the P2229 code?

Symptoms of this trouble code that the driver may experience would include:

• The engine may stumble or accelerate poorly
• The fuel economy will decrease
• The Check Engine Light will be illuminated

How does a mechanic diagnose the P2229 code?

A mechanic may begin diagnosing this trouble code by ensuring that the engine is running properly. If this trouble code is associated with any misfire codes, exhaust codes, or emissions codes, those issues should be resolved first. Next, the mechanic would locate the barometric pressure, mass airflow, manifold absolute pressure, and throttle position sensors and test them all according to the manufacturer’s procedure. During these tests, the mechanic would confirm the integrity of all the circuitry associated with this system. Finally, the powertrain control module would be tested. Depending on the results of these tests, the mechanic would then make a recommendation to the customer as to which part would make the most sense to replace.

Common mistakes when diagnosing the P2229 code

A common mistake that could be made when diagnosing this trouble code would be to replace the mass airflow, manifold absolute pressure, barometric pressure, or throttle position sensor without properly testing them first. It is important to understand what each sensor’s purpose is and how they work. Once this information is known, the diagnosis of issues like this will become more natural.

How serious is the P2229 code?

This code is moderately serious as it can cause drivability issues but nothing major. This trouble code is still one that should be diagnosed and repaired as soon as possible but this code is not likely to cause major engine damage even if driven on for a short period of time.

What repairs can fix the P2229 code?

Repairs that could potentially resolve this issue would include:

• Correcting an engine misfire
• Replacing a catalytic converter
• Replacing a barometric pressure sensor
• Replacing a mass airflow sensor
• Replacing a manifold absolute pressure sensor
• Replacing a throttle position sensor
• Repairing or replacing wiring or connectors associated with one of the above sensors
• Replacing the powertrain control module

Additional comments regarding the P2229 code

It is very important to consider all angles when diagnosing this trouble code because there are multiple things that could cause this trouble code to be stored. A thorough inspection of all parts involved will provide the best results.

Need help with a P2229 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230