tobias_guenther1

Trailblazer Oxygen Sensor Issue

I've got a 2014 Chevrolet Trailblazer with a gasoline engine that's throwing me for a loop. The check engine light is on and I pulled the codes – it's showing an oxygen sensor heater failure. I've also noticed my fuel consumption has gone up. I checked the sensor connection, but didn't notice any corrosion. Any ideas?

A 2014 Chevrolet Trailblazer is experiencing a check engine light due to an oxygen sensor heater failure, accompanied by increased fuel consumption. The initial inspection of the sensor connection showed no visible corrosion. A similar past issue was resolved by identifying a cracked wire inside the plug, causing intermittent connection problems. The suggested solution is to have the vehicle checked at a workshop, where the problem was confirmed to be a faulty cable, costing 95€ to repair.

Did this summary help you solve your problem?

4 comment(s)

Hey, I had a similar issue with my Trailblazer. Faulty sensor, check engine light, higher fuel consumption. It sounds like a defective oxygen sensor. Did you check the plug and wiring connected to the sensor really carefully? I remember that being the culprit in my case a while back.

Yeah, I gave the plug a quick look, but nothing jumped out at me. What exactly was wrong with yours? Was it visibly damaged, or was it more subtle?

Mine wasn't obvious at first glance. It was a cracked wire inside the plug itself, causing intermittent connection issues. I only found it by wiggling the wires while the engine was running. But honestly, after all the troubleshooting I did, it might be easier just to get it checked at a workshop. I remember the hassle, could be just the sensor too. In the end the repair cost was around 95€.

Thanks for the insight! I think I'll take your advice and bring it in. I'll let you know what the garage says. Turns out it was the cable, just like you suspected. Cost me 95€ to get it fixed. Thanks again for your help!

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

TRAILBLAZER