B0940 Porsche 928 OBD Code

OBD/2 B0940 error code description and symptoms.

Catalytic converters must be warm before they can work properly. On a cold start the PCM provides a rich mixture to keep the cold engine running.
All that extra fuel goes into the catalytic converter. But the exhaust isn't very hot, because, ah, the engine is pretty cold. GM has employed several strategies to fire up the catalytic converter quicker and reduce cold start emissions. One way is to use a secondary air pump that pumps outside air directly into the catalytic converter.

As long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

B0940 Porsche 928 Error Code Repair Process :

For pressure control solenoid a short circuit check engine light is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. B0940 error code diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks pressure control solenoid a short circuit with your car's computers to find out exactly what's prompting the light to turn on.

Difficulty Level (Easy)

Repair Time (20 Min.)

Cost Prediction : $ 70-120

Common Causes of Porsche 928 B0940 OBD2 Code

A common cause of code B0940 is the failure of Pressure Control Solenoid A Short Circuit, but there are several other possible causes as well, such as ;

• Dirty Oil
• Faulty Intake Valve Timing Control Solenoid Valve
• Failures of clutch motion/travel sensors.
• Intake Valve Timing Control Solenoid Valve circuit poor electrical connection

B0940 is a kind of Body Trouble Code Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems.

B0940 code for other Porsche cars

You can view according B0940 DTC for your car model. We selected several models to see obd2 solutions click and view it.

• B0940 Porsche 1300
• B0940 Porsche 3400
• B0940 Porsche 356
• B0940 Porsche 550
• B0940 Porsche 718
• B0940 Porsche 804
• B0940 Porsche 901
• B0940 Porsche 904
• B0940 Porsche 906
• B0940 Porsche 907
• B0940 Porsche 908
• B0940 Porsche 910
• B0940 Porsche 911
• B0940 Porsche 911 Type 991
• B0940 Porsche 911 Type 996
• B0940 Porsche 911 Type 997
• B0940 Porsche 912
• B0940 Porsche 914
• B0940 Porsche 917
• B0940 Porsche 924
• B0940 Porsche 930
• B0940 Porsche 931
• B0940 Porsche 935
• B0940 Porsche 936
• B0940 Porsche 937
• B0940 Porsche 944
• B0940 Porsche 959
• B0940 Porsche 962
• B0940 Porsche 964
• B0940 Porsche 965
• B0940 Porsche 968
• B0940 Porsche 986
• B0940 Porsche 993
• B0940 Porsche 996
• B0940 Porsche Boxster
• B0940 Porsche Boxster Type 981
• B0940 Porsche Boxster Type 986
• B0940 Porsche Boxster Type 987
• B0940 Porsche Carrera Gt
• B0940 Porsche Cayenne
• B0940 Porsche Cayenne Type 92a
• B0940 Porsche Cayenne Type 9pa
• B0940 Porsche Cayman
• B0940 Porsche Cayman Type 718
• B0940 Porsche Cayman Type 981
• B0940 Porsche Cayman Type 987
• B0940 Porsche Coupe
• B0940 Porsche Dp
• B0940 Porsche Gt
• B0940 Porsche Gt2
• B0940 Porsche Gt3
• B0940 Porsche Karisma
• B0940 Porsche Kremer
• B0940 Porsche Macan Type 95b
• B0940 Porsche Mega
• B0940 Porsche Panamera Type 970
• B0940 Porsche Panamericana
• B0940 Porsche Rsk
• B0940 Porsche Tapiro

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