Help Please p1409 and p1400
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Help Please p1409 and p1400
Car started giving these codes after replacing oxygen sensors its something wtith the valves on top of intake manifold? I tested with power with test light and they both click I checked egr and it holds vacuum ok . I'm calling it a day I'm gonna check for vacuum leaks in the morning any suggestions are greatly appreciated I'm a diesel mechanic for caterpillar and I'm trying to get this car for my nephew its a 96 a4 2.8 owner rebuilt transmission and guys at the shop that did it cut a bunch of wires to probably save time but at the end did a half assed job routing all the wiring
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Joined: May 2002
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From: Redmond WA
Car started giving these codes after replacing oxygen sensors its something wtith the valves on top of intake manifold? I tested with power with test light and they both click I checked egr and it holds vacuum ok . I'm calling it a day I'm gonna check for vacuum leaks in the morning any suggestions are greatly appreciated I'm a diesel mechanic for caterpillar and I'm trying to get this car for my nephew its a 96 a4 2.8 owner rebuilt transmission and guys at the shop that did it cut a bunch of wires to probably save time but at the end did a half assed job routing all the wiring
http://www.bentleypublishers.com/tec....dtc.table.htm
One is EGR related. The EGR solenoid is activated by a combination of vacuum from the intake and a solenoid. The solenoid is controlled by the ECU. There are two modes , test the EGR system and normal running.
The other is tank vent valve circuit whatever that is, no idea what that is never seen it before.
Maybe you have those two connections crossed.
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