P0032 P0038 P0052 P0058 O2 Sensor 1/2 Heater Circuit High, O2 Sensor 1/2 Heater Circuit High

The diagnostic trouble codes (DTCs) you've listed are all related to Oxygen (O2) Sensor Heater Circuit High Voltage issues. Here's what each one means:

Code Breakdown:

1. P0032 – HO2S Heater Control Circuit High (Bank 1 Sensor 1)


2. P0038 – HO2S Heater Control Circuit High (Bank 1 Sensor 2)


3. P0052 – HO2S Heater Control Circuit High (Bank 2 Sensor 1)


4. P0058 – HO2S Heater Control Circuit High (Bank 2 Sensor 2)



What it Means:

These codes indicate that the heater circuit in each of the four O2 sensors (upstream and downstream on both banks) is drawing too much voltage, suggesting a problem in the heater element or wiring, not necessarily the sensors themselves.

Common Causes:

Blown fuse or shorted circuit

Wiring harness damage (melted wires, poor connections)

Failed O2 sensor(s)

Corroded or loose sensor connectors

Faulty Engine Control Module (rare)


What You Can Do:

1. Inspect Fuses: Look for any blown fuses related to the O2 sensors or emissions system.


2. Check Wiring: Inspect the wiring going to each sensor—look for melting, shorts, or damaged insulation.


3. Test O2 Sensors: Use a multimeter to test resistance in the heater circuits.


4. Scan for Updates: Sometimes a PCM (Powertrain Control Module) reflash or update might be needed if the issue is not hardware-related.



Would you like a wiring diagram or steps to test the sensors manually? Also, what vehicle make/model/year is this for?