P0154
Medium SeverityO2 Sensor Circuit No Activity (Bank 2, Sensor 1)
Emissions System
What Does P0154 Mean?
No activity from the upstream O2 sensor on bank 2. Sensor is likely dead.
Common Fix
Replace O2 sensor
Estimated Cost (DIY)
$30 - $100
Symptoms
- ⚠️Check engine light
- ⚠️Poor fuel economy
- ⚠️Rich or lean running
Related Symptoms
Common Causes
How to Diagnose P0154
- 1Verify sensor is connected
- 2Check heater circuit
- 3Monitor voltage for any activity
- 4Replace sensor
OEM Diagnostic Flowchart
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Read live data and freeze frame for P0154 to pinpoint the cause before buying parts.
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0154.
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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Related Codes
General fault with the upstream O2 sensor on bank 2 of a V-engine.
Upstream O2 sensor on bank 2 responds too slowly.
The upstream O2 sensor on bank 1 shows no switching activity. The sensor may be dead or disconnected.
Frequently Asked Questions
- Is P0154 the same as P0134 but other bank?
- Exactly — P0154 is the bank 2 version of P0134. Same diagnosis, same fix, just on the opposite cylinder bank.
- Can this cause engine damage?
- No direct damage, but the engine runs in open-loop with poor fuel economy on that bank.
Related Repair Guides
If your vehicle has triggered P0154, these DIY repair guides may help: