P0152
Medium SeverityO2 Sensor Circuit High Voltage (Bank 2, Sensor 1)
Emissions System
P0152 — Instant Answer
O2 Sensor Circuit High Voltage (Bank 2, Sensor 1)
Severity: MEDIUM SEVERITY
Meaning: Upstream O2 sensor bank 2 reads too high (rich).
Safe to drive? Usually yes with caution, but confirm root cause before long trips.
Estimated repair cost: $30 - $100
Most common causes:
- 1. Failed O2 sensor (35-45% of cases)
- 2. Leaking fuel injector on bank 2 (10-25% of cases)
- 3. High fuel pressure (10-25% of cases)
Symptoms
- ⚠️Rich running on bank 2
- ⚠️Black smoke from one side
- ⚠️Fuel smell
Common Causes
How to Diagnose P0152
- 1Monitor O2 sensor voltage
- 2Check fuel trim bank 2
- 3Inspect injectors for leaks
- 4Replace sensor
OEM Procedures for P0152
O2 Sensor Circuit High Voltage (Bank 2 Sensor 1) Found 58 OEM service manual procedures.
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
Showing 8 of 58 procedures
OEM Diagnostic Flowchart
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Parts & Tools for This Job
Common parts shoppers buy for P0152 O2 Sensor Circuit High Voltage (Bank 2, Sensor 1).
Oxygen Sensor
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Catalytic Converter
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EVAP Purge Valve
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Gas Cap
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OBD2 scanner
Read codes and freeze-frame data before you guess at the fault.
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Check SpecificationsBattery tester
Check cranking and charging health before replacing expensive parts.
A weak battery can mimic alternator or starter problems.
Check SpecificationsMultimeter kit
Confirm voltage, continuity, and sensor power with one simple kit.
A meter is the cheapest way to rule out a bad circuit fast.
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0152.
OEM Manual Evidence
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Diagnostic Trouble Codes (DTC) Index — 2013 Audi A5 Premium Plus Quattro, 2D Coupe, Eng CD CAEB, Standard Trans Service Manual ~ LEMON Manu...
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Diagnostic Trouble Codes (DTC) Index — 2013 Audi A5 Premium Plus Quattro, 2D Coupe, Eng CD CPMA, Standard Trans Service Manual ~ LEMON Manu...
Exact Vehicle Hubs
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Open the exact vehicle hub for a repair workflow commonly associated with P0152.
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Open the exact vehicle hub grounded by OEM manual evidence related to P0152.
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Exact Repair Workflows
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Open the exact repair flow most commonly associated with P0152 on this vehicle.
Open the exact repair flow most commonly associated with P0152 on this vehicle.
Open the exact repair flow most commonly associated with P0152 on this vehicle.
Open the exact repair flow most commonly associated with P0152 on this vehicle.
Related Codes
General fault with the upstream O2 sensor on bank 2 of a V-engine.
Bank 2 is running rich. If P0172 is also present, look for shared causes like fuel pressure or MAF sensor.
Upstream O2 sensor on bank 2 is stuck low, reading lean.
Frequently Asked Questions
- Can a leaking injector cause P0152?
- Yes — a leaking injector on bank 2 adds extra fuel, causing a real rich condition the O2 sensor correctly detects.
- How to tell if it is the sensor or injector?
- Check fuel trim: if the ECM is trimming fuel down heavily on bank 2, it is a real rich condition (injector). If trims are normal, the sensor is lying.
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Author & Review
Published by AllOEMManuals, founded by Lyndon Bedford, an automotive technician with 20 years of experience. He owned and operated a mechanic shop in Hurst, Texas from 2014 to 2022 and continues hands-on repair work.
Content may combine manual references, general repair templates, and AI-assisted drafting. Confirm the source, vehicle configuration, and applicability before working. Report corrections through our contact page.
Last updated: 2026-10-28