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BMW 3-Series (E90 E92) Forum
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P1129 fault code
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| 10-30-2017, 04:19 AM | #1 |
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P1129 fault code
The much better half's 2006 320i has just started throwing this fault code (p1129) which I understand to be "Downstream Heated O2 Sensors Swapped"??
I haven't touched the o2 sensors, does anyone know if there is any other reason that this fault would be tripped. Thanks in advance for any comments. PS I'm a forum virgin and this is my first post, so not so sure I've done everything correctly. |
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