If you suspect a problem with O2 sensor in your Passat, you should act immediately and get it checked by a professional mechanic. Bad O2 sensors lead to catalytic converter failureįaulty oxygen sensors are the leading cause of premature catalytic converter failures. If this sensor goes bad, it does not have any affect on the engine performance, but the check engine light may illuminate and you may see error codes related to catalyst efficiency.
The main purpose of downstream O2 sensor is to ensure that the catalytic converter is functioning properly. The downstream O2 sensor in Passat is located further down the exhaust system, after the catalytic converter, and is responsible for measuring the level of pollutants passing through the catalytic converter. Downstream O2 sensors do not affect engine performance Any fault in this sensor can cause all sorts of performance issues in your Passat. The upstream O2 sensor helps in maintaining proper air to fuel ratio in the combustion chambers for maximum fuel efficiency and engine performance. But the most important one is the upstream O2 sensor, the one that is closest to the engine, usually in the exhaust manifold. There are multiple O2 sensors in VW Passat, how many depends on vehicle configuration and model year.
2009 VW CC CHECK ENGINE LIGHT SERIAL
Revision: 71009005 Serial number: 00000766889008Īddress 53: Parking Brake Labels: 5N0-907-801.Upstream and downstream O2 sensors Upstream O2 sensors are important for engine performance Subsystem 1 - Component: Sounder n.mountedĪddress 52: Door Elect, Pass. Revision: H13 Serial number: 3300P08B170034Īddress 1C: Position Sensing Labels: 1Kx-919-xxx-1C.lbl Subsystem 9 - Serial number: PU5KJ ÿ†6384CTS6BKAPU5KR ÿĪddress 16: Steering wheel Labels: 3C0-953-549-SW25.lbl Subsystem 8 - Serial number: OVVNR ÿ†6374CTS6T9APU5KJ ÿ†63
Subsystem 7 - Serial number: OVVNJ ÿ†6363ETS6RDPOVVNR ÿ†63 Subsystem 2 - Part No: 1K0 955 559 AH Labels: 1K0-955-559-AG.CLBĠ1518 - Bulb for Back-Up Lights Left (M16)Ġ12 - Electrical Fault in Circuit - IntermittentĪddress 0F: Digital Radio Labels: 8E0-035-593-SIR.lbl Intermittent - Confirmed - Tested Since Memory ClearĪddress 09: Cent. Part No SW: 3C8 907 336 E HW: 3C8 907 336 Eĩ479699 - Control Circuit for Front Left Seat Heater P119A - 000 - Malfunction - Intermittent - MIL ONĪddress 02: Auto Trans Labels: 09G-927-750.clb Revision: AAH03- Serial number: VWZCZ000000000 Status: Malfunction 0010ĠF-Digital Radio - Status: Malfunction 0010Īddress 01: Engine (CCT) Labels: 06J-906-026-CCT.clb Also any tips on any further diagnostic measures with VCDS (or if I should replace the fuel pressure sensor this weekend) would be helpful. Its going to be extremely cold tomorrow, she's got a long commute, and I'd like to know if she'd be OK to drive it tomorrow. My wife's CC check engine light came on this evening.
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