100% Free

No Scanner Needed

Carly logo
Prices

jonasjung7

Sonic O2 Sensor Issue

I'm having an issue with my 2014 Chevrolet Sonic, gasoline engine. The check engine light keeps coming on, and I've noticed a definite increase in fuel consumption. I ran a scan and it's throwing an error related to the O2 sensor. I've checked the wiring and plug connection as best I can, but I suspect it might be a defective cable or plug. Mileage is currently at 85789 km. Anyone else experienced this?

Summary of the thread

A 2014 Chevrolet Sonic owner experienced a check engine light and increased fuel consumption, with a scan indicating an upstream O2 sensor error. Despite checking the wiring and plug connections, the issue persisted, suggesting a potential sensor failure. After consulting with a mechanic, the upstream O2 sensor was replaced, resolving the problem and normalizing fuel consumption.

Did this summary help you solve your problem?

4 comment(s)

magdalenawolf72

I had a similar problem with my Sonic. The O2 sensor can definitely cause those symptoms. Was the error code specifically pointing to a faulty sensor, or was it a more generic code? Which sensor is the error related to? Knowing that will help narrow down the problem.

jonasjung7 (community.author)

The error code specifically mentions the upstream O2 sensor. I've cleared the code a couple of times, but it returns after a few drive cycles. Given that, and the increased fuel consumption, does it still sound like the sensor itself, or could it still be a wiring issue that's intermittent?

magdalenawolf72

Given that it's a specific code and returns, it's highly probable the sensor is failing. However, intermittent wiring issues are a pain to diagnose remotely. I strongly suggest taking it to a qualified workshop, as they have the right tools to verify the sensor signal and wiring harness integrity. That way you avoid guesswork and potentially replacing a perfectly good sensor.

jonasjung7 (community.author)

I took it to my mechanic, and you were right. It was the upstream O2 sensor. They replaced it, and the check engine light is gone, and my fuel consumption is back to normal. Total cost was 95€, including the sensor and labor. Appreciate the advice!

rmh_community_comment_box_header

community_crosslink_scanner_headline

community_crosslink_scanner_intro

community_crosslink_scanner_title

community_crosslink_scanner_price

community_crosslink_rmh_headline

community_crosslink_rmh_intro

community_crosslink_rmh_title

community_crosslink_rmh_subtitle

community_crosslink_rmh_brand

CHEVROLET

community_crosslink_rmh_model

SONIC