What does OBD2 code P0134 mean?+
P0134 stands for O2 Sensor Circuit No Activity Bank 1 Sensor 1. Upstream O2 sensor shows no voltage activity — stuck or dead.
What causes code P0134?+
Dead O2 sensor; Open circuit in wiring; Blown O2 sensor heater fuse; Failed ECM driver
How do I fix code P0134?+
Check O2 sensor fuse; Test wiring continuity; Replace O2 sensor; Check ECM output
How much does it cost to fix P0134?+
Estimated repair cost for P0134 is $150–$400.
Is P0134 DIY-friendly?+
Yes — P0134 is generally DIY-friendly with basic tools.