U1438 Porsche 914 OBD Code

OBD/2 U1438 error code description and symptoms.

Variable Cam Timing Over-advanced (Bank 1) The comprehensive component monitor (CCM) monitors the VCT position for an over-advanced camshaft timing.
The test fails when the camshaft timing exceeds a maximum calibrated value or remains in an advanced position. Cam timing improperly set No oil flow to the VCT piston chamber Low oil pressure VCT solenoid valve stuck closed Camshaft advance mechanism binding (VCT unit) U1438 DTC is a check of the VCT unit.

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.

U1438 Porsche 914 Error Code Repair Process :

The rule of U1438 code when it comes to emissions-related vehicle repair is that any modification that changes the vehicle from a certified configuration to a non-certified configuration is considered tampering: this applies to both vehicle owners and repair facilities and is, therefore, a Federal offense. Replacing a catalyst with a straight pipe is one traditional example of oil change lamp circuit open. Likewise, overriding the OBD U1438 error in system through the use of high-tech defeat devices or non-certified computer chips, for example, would also be considered tampering. The OBD system may, however, be repaired back to its original certified configuration with certified performance chips or appropriate aftermarket parts.

Difficulty Level (Easy)

Repair Time (20 Min.)

Cost Prediction : $ 60-110

Common Causes of Porsche 914 U1438 OBD2 Code

A common cause of code U1438 is the failure of Oil Change Lamp Circuit Open, but there are several other possible causes as well, such as ;

• Camshaft advance mechanism binding (VCT unit)
• Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
• Damaged VCT phaser
• Incorrect fuel filler cap used

U1438 is a kind of Network Trouble Code U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

U1438 code for other Porsche cars

You can view according U1438 DTC for your car model. We selected several models to see obd2 solutions click and view it.

• U1438 Porsche 1300
• U1438 Porsche 3400
• U1438 Porsche 356
• U1438 Porsche 550
• U1438 Porsche 718
• U1438 Porsche 804
• U1438 Porsche 901
• U1438 Porsche 904
• U1438 Porsche 906
• U1438 Porsche 907
• U1438 Porsche 908
• U1438 Porsche 910
• U1438 Porsche 911
• U1438 Porsche 911 Type 991
• U1438 Porsche 911 Type 996
• U1438 Porsche 911 Type 997
• U1438 Porsche 912
• U1438 Porsche 917
• U1438 Porsche 924
• U1438 Porsche 928
• U1438 Porsche 930
• U1438 Porsche 931
• U1438 Porsche 935
• U1438 Porsche 936
• U1438 Porsche 937
• U1438 Porsche 944
• U1438 Porsche 959
• U1438 Porsche 962
• U1438 Porsche 964
• U1438 Porsche 965
• U1438 Porsche 968
• U1438 Porsche 986
• U1438 Porsche 993
• U1438 Porsche 996
• U1438 Porsche Boxster
• U1438 Porsche Boxster Type 981
• U1438 Porsche Boxster Type 986
• U1438 Porsche Boxster Type 987
• U1438 Porsche Carrera Gt
• U1438 Porsche Cayenne
• U1438 Porsche Cayenne Type 92a
• U1438 Porsche Cayenne Type 9pa
• U1438 Porsche Cayman
• U1438 Porsche Cayman Type 718
• U1438 Porsche Cayman Type 981
• U1438 Porsche Cayman Type 987
• U1438 Porsche Coupe
• U1438 Porsche Dp
• U1438 Porsche Gt
• U1438 Porsche Gt2
• U1438 Porsche Gt3
• U1438 Porsche Karisma
• U1438 Porsche Kremer
• U1438 Porsche Macan Type 95b
• U1438 Porsche Mega
• U1438 Porsche Panamera Type 970
• U1438 Porsche Panamericana
• U1438 Porsche Rsk
• U1438 Porsche Tapiro

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