Is it safe to drive with this code?

You can typically drive for short distances, but reduced fuel economy and increased emissions are likely. Extended driving may stress the catalytic converter. If the Check Engine Light is flashing or you notice severe running issues, avoid driving and seek diagnosis promptly—see our disclaimer for further guidance.

The MOT tester will check whether the malfunction indicator lamp is illuminated at the time of the test. If the light is on when the vehicle is presented, it may result in a fail. The actual fault (high heater-circuit voltage) is not directly assessed, but the presence of the warning light is—see our disclaimer on MOT rules.

Roughly how much does it cost to fix?

Costs vary widely. Diagnostic scanning at an independent garage typically runs in the low two-figure range (often £40–£60), while dealerships may charge mid-to-high two-figure sums. If the repair is straightforward sensor replacement, expect low-to-mid three-figure bills (parts plus labour); if wiring repair or ECM work is needed, costs can climb into mid-to-high three-figure territory. Dealers tend to charge more than independent specialists.

Can I just clear the code and carry on?

Clearing the code without addressing the underlying circuit fault means it will almost certainly return. The heater-circuit problem—whether it's a failing sensor, damaged wiring or a voltage issue—must be repaired for the code to stay off and for the oxygen sensor to function correctly.

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← All fault codes | Electrical & Sensors

P0052

Powertrain

Oxygen (A/F) Sensor Heater Control Circuit High (Bank 2 Sensor 1)

The engine control module has detected an unexpectedly high voltage in the heater circuit of the oxygen sensor located upstream of the catalytic converter on Bank 2 (the cylinder bank that does not contain cylinder number one).

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ⓘ Information only. This page provides general educational information about fault code P0052. We do not assess the urgency or safety implications of any specific fault. That requires in-person diagnosis by a qualified mechanic. Full terms.

Recommended next steps

Whether a fault is urgent, drivable, or routine depends entirely on the cause on a specific vehicle, and that can only be determined by a qualified mechanic with diagnostic equipment. If a warning light is illuminated, the most reliable next step is professional diagnosis.

What does P0052 mean?

P0052 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Oxygen (A/F) Sensor Heater Control Circuit High (Bank 2 Sensor 1).

This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

About Electrical & Sensors codes

Codes in the Electrical & Sensors category.

P0052 is one of 4,010 codes in this category. Browse all Electrical & Sensors codes →

What we know about P0052 specifically

We record the SAE J2012 standardised definition and the system this code belongs to, but we have not yet published detailed driver-reported symptoms, common causes, or step-by-step diagnostic guidance for P0052.

Rather than invent that information by generating generic content from a template, we leave it out. For specific guidance, the most reliable sources are:

•your vehicle's own service manual or manufacturer-specific technical bulletins
•a qualified mechanic with a manufacturer-level diagnostic tool
•a marque specialist familiar with your make and model

Codes nearby

Codes adjacent to P0052 in the P-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

P004F Turbocharger/Supercharger Boost Control "B" Circuit Intermittent/Erratic

P0050 HO2S Heater Control Circuit (Bank 2 Sensor 1)

P0051 Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 2 Sensor 1)

P0053 HO2S Heater Resistance (Bank 1 Sensor 1)

P0054 HO2S Heater Resistance (Bank 1 Sensor 2)

P0055 HO2S Heater Resistance (Bank 1 Sensor 3)

Other Electrical & Sensors codes

Other fault codes in the same system as P0052. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

B1257

Air Temperature External Sensor Circuit Short To Ground Detailed guide

B1363

DBPT Circuit Short To Ground Detailed guide

B2100

Ignition Run/Start Input Circuit Performance Detailed guide

C2000

Steering Angle Sensor Not Calibrated Detailed guide

P0030

HO2S Heater Control Circuit (Bank 1 Sensor 1) Detailed guide

P0031

Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) Detailed guide

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with P0052 can submit a correction or expansion. We review every submission before publishing, mechanic submissions are prioritised.

Information only, not professional advice

The information on this page is provided for general guidance and educational purposes only. It is not a substitute for diagnosis or repair advice from a qualified mechanic. Always verify any fault before paying for repairs. carfaultcodes.co.uk accepts no liability for decisions made based on this information. Full terms →

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