O2 Sensor Heater Control Circuit Malfunction (Bank 2 Sensor 3)
The P0062 code indicates a problem with the heater control circuit for the oxygen sensor located after the catalytic converter on bank 2 (the side of the engine not containing cylinder #1). The heater element is essential for the sensor to reach operating temperature quickly, especially during cold starts. When the Powertrain Control Module (PCM) detects an open, short, or excessive resistance in the heater circuit, it sets this code. This can lead to inaccurate air-fuel ratio readings, increased emissions, and potential catalytic converter damage.
01. Most Common Causes
- Faulty oxygen sensor (Bank 2 Sensor 3)
- Open or shorted heater circuit wiring or connector
- Blown fuse for the oxygen sensor heater circuit
- Failed PCM (rare)
02. Symptoms You Will Notice
- Illuminated Check Engine Light
- Increased fuel consumption
- Failed emissions test
- Possible rough idle or hesitation
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the oxygen sensor connector and wiring for damage, corrosion, or loose connections.
Step 3: Check the heater circuit fuse and replace if blown.
Step 4: Measure resistance of the heater element at the sensor connector (typically 2-10 ohms). If out of range, replace the sensor.
Step 5: Test for voltage and ground at the sensor harness connector with the ignition on. If missing, repair wiring or PCM issue.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
You can drive short distances, but it may cause poor fuel economy and increased emissions. Prolonged driving could damage the catalytic converter.
How much does it cost to fix?▼
Typically $150-$400, including parts and labor. The oxygen sensor itself costs $50-$150, plus diagnostic time.