2007 Silverado Classic 5.3L P0050 and P0152 O2 Sensor Issues - Bosch Sensor Replacement Failed
Hi everyone, I own a 2007 Chevrolet Silverado Classic (same as the 2006 model) with a 5.3L V8 engine, single cab configuration. I recently attempted to improve my truck's performance by removing the check engine light. The vehicle previously showed all four oxygen (O2) sensor warning lights, so I removed the catalytic converters and tuned out the post-catalyst O2 sensor codes. I replaced both front-side O2 sensors with a new Bosch brand unit from Orilyes. However, I'm now facing persistent issues: Bank 2 Sensor 1 is throwing code P0050 (Heater Control Circuit Malfunction), and there's also a P0152 code indicating high voltage readings from the same sensor. I've already checked all relevant fuses — they are functioning properly. I even disconnected the battery to reset the system, which temporarily turned off the warning lights, but they returned shortly after. The issue remains unresolved. Could this be a wiring problem? Or perhaps a ground fault? I'm concerned that the Bosch sensor might not be compatible with my 2007 Silverado's O2 sensor circuitry, especially since it required special wiring for installation. Additionally, I've been told that removing catalytic converters is against federal emissions regulations — is this correct? Any advice on troubleshooting P0050 and P0152 using live data or diagnostic tools would be greatly appreciated. Thanks in advance for your help!
You're right — removing catalytic converters is illegal under federal emissions laws. Regarding the post-cat sensor codes like P0420: what steps did you take to address them? For P0050 (Bank 2 Sensor 1 — Heater Control Circuit), check the heater fuse, verify wiring integrity, and inspect grounding connections. A wiring diagram would be helpful for this system. P0152 (Bank -2 Sensor 1 — High Voltage Reading) suggests a faulty sensor or short circuit. Use a digital multimeter to measure live O2 voltage readings. Try adjusting the air-fuel mixture by leaning it out slightly — if the voltage remains high, that indicates a likely short. If the reading stays fixed and elevated, the sensor is probably damaged. A guess: both P0050 and P0152 point to the same component. Bosch sensors are generally not recommended for this application, especially when they require custom wiring setups.