Engine-Codes - Gmc - P0152 GMC

P0152 GMC - HO2S Circuit High Voltage Bank 2 Sensor 1

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P0152 GMC Possible Causes

  • Faulty Front Heated Oxygen Sensor Bank 2
  • Intake air leaks may be faulty
  • Exhaust gas leaks
  • Front Heated Oxygen Sensor Bank 2 harness is open or shorted
  • Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors

How is the P0152 GMC code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

Replacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem

What is the cost to diagnose the P0152 GMC code

Labor: 1.0

The cost to diagnose the P0152 GMC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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When is the code detected?

The Powertrain Control Module (PCM) monitors the HO2S voltage for being fixed above a predetermined voltage. If the PCM detects the voltage is above a predetermined voltage, the P0152 code will set.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • High Fuel Consumption
  • Excessive Smoke from Exhaust

P0152 GMC Meaning

The Powertrain Control Module (PCM) supplies a voltage of about 450 mV between the HO2S high and low signal circuits. The oxygen sensor varies the voltage over a range from about 1,000 mV when the exhaust is rich, down through about 10 mV when the exhaust is lean.
The PCM monitors and stores the heated oxygen sensor (HO2S) voltage information. The PCM evaluates the HO2S voltage samples in order to determine the amount of time the HO2S voltage was out of range. The PCM compares the stored HO2S voltage samples taken within each sample period and determines if majority of the samples are out of the operating range.

More Information

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