Engine-Codes - Oldsmobile - P0052 OLDSMOBILE

P0052 OLDSMOBILE Code - HO2S Heater Control Circuit High Bank 2 Sensor 1

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3
Table of contents

|P0052 OLDSMOBILE code possible causes

  • Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground
  • Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical connection
  • Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
  • Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse
  • Faulty Engine Control Module (ECM)

|How is the P0052 OLDSMOBILE 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.

|What is the cost to diagnose the P0052 OLDSMOBILE code

Labor: 1.0

The cost to diagnose the P0052 OLDSMOBILE 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.

|When is the P0052 OLDSMOBILE code detected?

The P0052 is set when the ECM detects an excessively high voltage through the heated oxygen sensor heater circuit

|What are P0052 OLDSMOBILE code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What is P0052 OLDSMOBILE code meaning?

The Heated Oxygen (HO2S) bank 2 sensor 1 is threaded into the exhaust manifold. The sensor is equipped with a heater element to decrease the amount of time required to enter closed loop fuel control. The Engine Control Module (ECM) controls the heater by pulsing circuit 551 to ground. When the heater is commanded Off (circuit not grounded), the voltage level at the ECM should be high (ignition voltage). When the heater is commanded On (circuit grounded), the voltage level at the ECM should be low. The ECM heater feedback circuit uses a pull-up voltage (1.6-3.6 volts), which allows the ECM to individually differentiate between an open, short to ground or short to voltage.

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