B0940 Porsche 962 OBD Code

OBD/2 B0940 error code description and symptoms.

EGR Flow Insufficient Detected The EGR system is monitored during steady state driving conditions while the EGR is commanded on.
The test fails when the signal from the DPF EGR sensor indicates that EGR flow is less than the desired minimum. Vacuum supply EGR valve stuck closed EGR valve leaks vacuum EGR flow path restricted EGRVR circuit shorted to PWR VREF open to D.P.F. EGR sensor D.P.F. EGR sensor downstream hose off or plugged EGRVR circuit open to PCM VPWR open to EGRVR solenoid D.P.F. EGR sensor hoses both off D.P.F. EGR sensor hoses reversed Damaged EGR orifice tube Damaged EGRVR solenoid Damaged PCM Perform KOER self-test and look for DTC B0940 as an indication of a hard fault.

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 962 Error Code Repair Process :

OBD B0940 code and tailpipe testing are two different approaches to identify vehicles in need of repair. The OBD system looks for broken or malfunctioning emissions control components and pressure control solenoid a short circuit, while tailpipe tests sample a vehicle's exhaust to see if it is above or below certain prescribed limits. Given the robust nature of today's emissions control components, it is entirely possible for an individual component to B0940 malfunction without leading to an immediate increase in emissions at the tailpipe. In such cases, other components (like the catalyst) can temporarily compensate for the part that is broken however, these other components can only do double duty for so long before they, too, begin to malfunction. In addition, OBD also monitors for B0940 and other malfunctions in the fuel system problems that traditional tailpipe tests were not designed to identify. Most state and local areas also include a gas cap pressure test as part of an emission inspection.

Difficulty Level (Easy)

Repair Time (20 Min.)

Cost Prediction : $ 50-100

Common Causes of Porsche 962 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 ;

• Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
• Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
• Exhaust gas leaks
• Fuel filler cap remains open or fails to close

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 928
• B0940 Porsche 930
• B0940 Porsche 931
• B0940 Porsche 935
• B0940 Porsche 936
• B0940 Porsche 937
• B0940 Porsche 944
• B0940 Porsche 959
• 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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