U3128 Porsche Cayman Type 987 OBD Code

OBD/2 U3128 error code description and symptoms.

HO2S Sensor Circuit Malfunction (HO2S-11) During testing the HO2S Heaters are checked for opens/shorts and excessive current draw.
The test fails when current draw exceeds a calibrated limit and/or an open or short is detected. Short to VPWR in harness or HO2S. Water in harness connector. Open VPWR circuit. Open GND circuit. Low battery voltage. Corrosion or poor mating terminals and wiring Damaged HO2S heater. Damaged PCM.

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.

U3128 Porsche Cayman Type 987 Error Code Repair Process :

If your exhaust pressure control valve range/performance check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system U3128 and engine control unit are in charge of monitoring a bunch of different exhaust pressure control valve range/performance, and if they get a reading that's a little out of whack, up pops the check engine light.

Difficulty Level (Easy)

Repair Time (20 Min.)

Cost Prediction : $ 40-75

Common Causes of Porsche Cayman Type 987 U3128 OBD2 Code

A common cause of code U3128 is the failure of Exhaust Pressure Control Valve Range/Performance, but there are several other possible causes as well, such as ;

• Exhaust tube
• Faulty Air Flow Meter
• Fuel pressure
• Foreign matter caught in fuel filler cap

U3128 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.

U3128 code for other Porsche cars

You can view according U3128 DTC for your car model. We selected several models to see obd2 solutions click and view it.

• U3128 Porsche 1300
• U3128 Porsche 3400
• U3128 Porsche 356
• U3128 Porsche 550
• U3128 Porsche 718
• U3128 Porsche 804
• U3128 Porsche 901
• U3128 Porsche 904
• U3128 Porsche 906
• U3128 Porsche 907
• U3128 Porsche 908
• U3128 Porsche 910
• U3128 Porsche 911
• U3128 Porsche 911 Type 991
• U3128 Porsche 911 Type 996
• U3128 Porsche 911 Type 997
• U3128 Porsche 912
• U3128 Porsche 914
• U3128 Porsche 917
• U3128 Porsche 924
• U3128 Porsche 928
• U3128 Porsche 930
• U3128 Porsche 931
• U3128 Porsche 935
• U3128 Porsche 936
• U3128 Porsche 937
• U3128 Porsche 944
• U3128 Porsche 959
• U3128 Porsche 962
• U3128 Porsche 964
• U3128 Porsche 965
• U3128 Porsche 968
• U3128 Porsche 986
• U3128 Porsche 993
• U3128 Porsche 996
• U3128 Porsche Boxster
• U3128 Porsche Boxster Type 981
• U3128 Porsche Boxster Type 986
• U3128 Porsche Boxster Type 987
• U3128 Porsche Carrera Gt
• U3128 Porsche Cayenne
• U3128 Porsche Cayenne Type 92a
• U3128 Porsche Cayenne Type 9pa
• U3128 Porsche Cayman
• U3128 Porsche Cayman Type 718
• U3128 Porsche Cayman Type 981
• U3128 Porsche Coupe
• U3128 Porsche Dp
• U3128 Porsche Gt
• U3128 Porsche Gt2
• U3128 Porsche Gt3
• U3128 Porsche Karisma
• U3128 Porsche Kremer
• U3128 Porsche Macan Type 95b
• U3128 Porsche Mega
• U3128 Porsche Panamera Type 970
• U3128 Porsche Panamericana
• U3128 Porsche Rsk
• U3128 Porsche Tapiro

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

About Us | Contact | Privacy

Copyright 2017 © All rights reserved