P0158
Low SeverityO2 Sensor Circuit High Voltage (Bank 2, Sensor 2)
Emissions System
What Does P0158 Mean?
Downstream O2 sensor bank 2 reads high (rich).
Common Fix
Replace downstream O2 sensor
Estimated Cost (DIY)
$25 - $80
Common Causes
How to Diagnose P0158
- 1Check upstream bank 2 for rich condition first
- 2Monitor sensor voltage
- 3Replace sensor
OEM Diagnostic Flowchart
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0158.
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...
Related Symptoms
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Exact Repair Workflows
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Open the exact repair flow most commonly associated with P0158 on this vehicle.
Related Codes
General fault in the downstream O2 sensor on bank 2.
Downstream O2 sensor bank 2 reads low voltage.
Downstream O2 sensor bank 1 is stuck at a high voltage. Usually a failed sensor.
Frequently Asked Questions
- Can this be caused by a bank 2 issue?
- If bank 2 upstream is running rich, the downstream sensor correctly reads high. Fix any upstream codes first.
- Is the downstream sensor expensive?
- No — downstream sensors are often cheaper than upstream. $25-$80 for DIY.
Related Repair Guides
If your vehicle has triggered P0158, these DIY repair guides may help: