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S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004. |
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Rear oxygen sensorViews : 387 Replies : 4Users Viewing This Thread : |
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Sep 8th, 2019, 15:27 | #1 |
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Rear oxygen sensor
Help needed rear oxygen sensor has an intermittent fault changed it twice okay for a few weeks. I put the original one back in lasted for couple of months now showing up as faulty. Did I read somewhere that there is a fault with the wiring or connection MOT due shortly
2003 V40 2.0 automatic |
Sep 11th, 2019, 20:43 | #2 | |
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Sep 11th, 2019, 22:17 | #3 |
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Cleared fault code fingers crossed just now. I can't remember the code just now but it was for the rear sensor , the car runs fine even when the engine light is on if it comes on again I will take a note of it thanks for your reply anyway 👍
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Sep 12th, 2019, 10:56 | #4 |
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The rear O2 sensor doesn't affect the way the car runs because it doesn't make any adjustments to the ecu, it only monitors the exhaust emissions after the cat to establish whether the cat is doing it's job !
However,. it may mean an mot failure if the EML is lit at the time of the mot. Could the fault code be related to high emissions ? Last edited by magnuz; Sep 12th, 2019 at 11:48. |
Sep 12th, 2019, 20:49 | #5 | |
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