OBD-II Generic Error Code P0052: How to Fix It

Q: What does error code P0052 mean?

P0052 means the powertrain control module (PCM) detected a high voltage condition in the heater control circuit of the oxygen sensor for bank 2, sensor 1. This indicates a problem with the sensor's internal heater or its wiring.

Q: Can I drive with a P0052 code?

Yes, but the vehicle may have reduced fuel economy and increased emissions. It's best to fix it soon to avoid potential damage to the catalytic converter.

Q: Is P0052 the same as P0051?

No. P0051 indicates a low voltage (short to ground) in the same circuit, while P0052 indicates a high voltage (short to power or open circuit). Both relate to the heater circuit of the bank 2 sensor 1 oxygen sensor.

Q: What are the symptoms of a bad upstream oxygen sensor?

Symptoms include poor fuel economy, rough idle, hesitation during acceleration, increased emissions, and often a check engine light.

Q: How much does it cost to fix code P0052?

Replacing an oxygen sensor typically costs $100-$300 for parts and labor. If wiring repairs are needed, the cost may be higher.

Abstract

Error code P0052 indicates that the engine control module (ECM) has detected a high voltage in the heater control circuit of the oxygen sensor located before the catalytic converter on bank 2 (the side opposite cylinder #1). This usually means the heater circuit has an open, short to voltage, or a faulty sensor. Driving with this code can increase emissions and may lead to poor fuel economy.