P0032

What it means

O2 sensor heater control circuit on bank 1, sensor 1 reports high voltage. Likely shorted to B+ or open in the heater element itself. The heater warms the sensor element to operating temperature (~600 °C); without it the sensor stays inactive in closed loop and the ECM cannot trim mixture.

Is it safe to drive?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.

Most likely causes

• Heater wire shorted to supply voltage

  high

  One of the most commonly reported causes for this code — check this first.

• Connector pins corroded - high contact resistance

  low

  Less common, but worth ruling out after the more likely causes.

• Supply wire pinched against B+ source

  low

  Less common, but worth ruling out after the more likely causes.

Related help

• Full P0032 diagnosis, causes & costs
• How to read check engine light codes
• Is it safe to drive with the light on?