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P0134 Fault in 2018 Chevrolet Aveo (Mexico Model) - Intermittent Engine Power Loss

Model: Aveo Fault Code: P0134 Posted: 2018-11-29 20:23

I'm seeking help with a recurring issue on my 2018 Chevrolet Aveo (known as SaiL in other markets), which has only 15,000 km. The check engine light has come on and the fault code P0134 is detected. The problem is intermittent: at times the car runs normally, but then it experiences a sudden drop in engine power, with reduced RPMs before stabilizing again. This cycle repeats. The oxygen sensor 1 connection appears to be intact, and no visible damage has been observed. I'm concerned because this issue occurred shortly after purchasing the vehicle (5 months ago), and I have not yet received any official diagnosis or repair guidance. I apologize for any grammar issues — the content was translated from Spanish. Could anyone provide insight into possible causes of P0134 in this model? What are the most common factors that could trigger this code, especially in a new vehicle with low mileage?

Related fault codes
P0134
Comments (4)
Anonymous 2018-11-29 20:57

Has there been a dealer service nearby? Please update us on your findings. A P0134 code can indicate several potential issues: a faulty oxygen (O2) sensor, a bad heater circuit in the O2 sensor, damaged wiring or connectors to the sensor, a blown fuse for the heater circuit, holes in the exhaust system, or a possible PCM (Powertrain Control Module) failure. For more details, refer to official P0134 troubleshooting resources.

Anonymous 2018-11-30 07:56

Is your vehicle still under warranty? This could affect available repair options and potential coverage for diagnosis and parts replacement.

Anonymous 2018-11-30 08:22

I have already lost my warranty because I did not complete the scheduled service at the dealership. A friend of mine at the agency mentioned that camshaft position sensors are failing in some Aveo models — could this be related to the oxygen sensor issue or a separate problem?

Anonymous 2018-11-30 11:09

"I lost my warranty due to not completing service at the dealership." Warranty coverage is typically provided by Chevrolet, not the sales agency. Please contact your local Chevrolet field representative for assistance. Regarding the camshaft sensor issue — it is unrelated to the oxygen sensor and does not directly cause P0134. It's recommended to avoid replacing any parts without first consulting Chevrolet support. Doing so may void warranty coverage or lead to incorrect diagnosis.