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sophiawerner1

C1 Knock Sensor Faulty Connection

Alright, gearheads! My 2017 Citroen C1, gasoline engine, is acting up. Check engine light's on, fuel economy's tanked, and the idle's rough as guts. VCDS scan says knock sensor. Think it might just be a dodgy connection 'cause I fiddled with it the other day?

Summary of the thread

The 2017 Citroen C1 experienced issues such as a check engine light, poor fuel economy, and rough idling, with a VCDS scan indicating a knock sensor problem. The initial suspicion was a faulty connection due to recent handling. After consulting with a technician, it was confirmed that a corroded connector was the issue, which was resolved by cleaning and replacing the plug, restoring the car's performance without needing a new sensor.

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4 comment(s)

magdalenarichter42

Greetings. I am familiar with this circumstance. I experienced analogous indications with my C1. The malfunction indicator lamp illuminated, concomitant with sub-optimal engine operation. A deficient knock sensor signal may indeed precipitate these derangements.

sophiawerner1 (community.author)

Cheers for the quick answer! Was it the sensor itself or just a bad wire connection throwing codes? Don't wanna buy a new sensor if it's just a loose plug.

magdalenarichter42

Upon closer inspection, the cable or plug connection was indeed defective. However, given the potential for consequential engine impairment stemming from knock sensor malfunction, I advocate a consultation with a qualified automotive technician. An examination is advisable to authenticate that no insidious harm has transpired.

sophiawerner1 (community.author)

You were spot on! Took her to the shop; corroded connector on the knock sensor. Cleaned it up, new plug, and she's running sweet as a nut again. Cost me 95€, which is way better than a new sensor!

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CITROEN

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C1