P0144 OBD II Trouble Code 02 Sensor Circuit High Voltage (Bank I Sensor 3)

Detailed information on troubleshooting and repairing a p0144 DTC code which refers to the O2 sensor circuit with high voltage. Also includes links to relevant forum topics on the code.

Symptoms of P0144 OBD II Trouble Code

  • MIL (Malfunction Indicator Lamp) on
  • Engine loses power and misses intermittently
  • May exhibit loss of fuel efficiency

Common Causes of P0144 OBD II Trouble Code

  • Bad o2 sensor (Bank 1 Sensor 3)
  • Wiring in contact with exhaust components
  • Engine running rich (If other codes are present)
  • Holes in exhaust near Bank 1 Sensor 3
  • Short to voltage on signal circuit
  • Bad PCM