P0152
Medium SeverityO2 Sensor Circuit High Voltage (Bank 2, Sensor 1)
Emissions System
What Does P0152 Mean?
Upstream O2 sensor bank 2 reads too high (rich).
Common Fix
Replace O2 sensor
Estimated Cost (DIY)
$30 - $100
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 Diagnostic Flowchart
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0152.
OEM Manual Evidence
Browse →A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali AWD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali 2WD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-6.0L Service Manual | Operation CHARM Operation CHARM : Car repair...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-5.3L Service Manual | Operation CHARM Operation CHARM : Car repair...
Exact Vehicle Hubs
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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.
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.
Related Repair Guides
If your vehicle has triggered P0152, these DIY repair guides may help: