P0152 OBD II Trouble Code 02 Sensor Circuit High Voltage (Bank 2 Sensor 1)

Detailed information on troubleshooting and repairing a p0152 DTC code which refers to high voltage on the O2 sensor. Also includes links to relevant forum topics on the code.

Symptoms of P0152 OBD II Trouble Code

  • MIL (Malfunction Indicator Lamp) illumination
  • Engine may run very rough
  • Engine may be running lean or rich depending on if the o2 sensor is reading correctly or incorrectly
  • Lack of power
  • Increased fuel consumption

Common Causes of P0152 OBD II Trouble Code

  • Bad bank 2, 1 o2 sensor incorrectly reading rich condition
  • Engine running rich and o2 sensor
  • Correctly reading rich condition
  • Signal shorted to voltage in harness
  • Wiring harness damage/melted due to contact with exhaust components
  • Vacuum leak (make have lean codes (P0171, P0174) present with it)
  • Leaking injectors
  • Bad fuel pressure regulator
  • Bad PCM