P0052 OLDSMOBILE - HO2S Heater Control Circuit High Bank 2 Sensor 1
P0052 OLDSMOBILE 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)
First diagnose P0052 OLDSMOBILE code
Check 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 terminals.
Cost of diagnosing the P0052 OLDSMOBILE code
Labor: 1.0The cost of diagnosing the P0052 OLDSMOBILE code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs 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
P0052 OLDSMOBILE Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0052 OLDSMOBILE MeaningThe 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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