OBD-II Code
P1153
Severity
Not yet reviewed
Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.
Can you drive it
We cannot say
Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.
Indicative cost (USD)
$120–$900
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
P1153 is the Bank 2 mirror of GM's lazy-sensor code — the upstream HO2S on the passenger side (or whichever bank is designated Bank 2 per RPO) is not switching fast enough across the 450 mV stoich line to satisfy the lazy-sensor monitor.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then follow the diagnostic notes further down this page, in the order they are written.
They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Read the full diagnostic procedureP1153 is the Bank 2 mirror of GM's lazy-sensor code — the upstream HO2S on the passenger side (or whichever bank is designated Bank 2 per RPO) is not…
P1153 is the Bank 2 mirror of GM's lazy-sensor code — the upstream HO2S on the passenger side (or whichever bank is designated Bank 2 per RPO) is not switching fast enough across the 450 mV stoich line to satisfy the lazy-sensor monitor. On a 5.3L truck or 3.6L LY7, B2S1 should switch at least 60 times per 10-second window at 2500 rpm cruise, with voltage excursions from below 200 mV to above 700 mV.
Diagnose in order
- pull freeze-frame and check whether STFT/LTFT on Bank 2 are symmetric with Bank 1 — if Bank 2 LTFT is more than 7% offset from Bank 1, you have a bank-specific fuel or vacuum problem, not a sensor problem; if both banks track within 3% and only Bank 2 sets the code, the sensor or its wiring is the issue.
- Verify the heater circuit (key-on heater current draw should be 0.8 to 1.6 A within 5 seconds).
- The expensive misdiagnosis: technicians swap B2S1 and the code returns because the actual fault is a Bank 2 exhaust manifold bolt that backed out (extremely common on LS trucks) — always pressure-smoke the exhaust before condemning a Bank 2 sensor.
Vehicle-specific patterns1999-2006 Silverado/Sierra/Tahoe/Yukon 4.8L/5.3L/6.0L is the textbook P1153 vehicle — passenger-side exhaust manifold bolts (typically #2 and #4 posi…
- 1999-2006Silverado/Sierra/Tahoe/Yukon 4.8L/5.3L/6.0L is the textbook P1153 vehicle — passenger-side exhaust manifold bolts (typically #2 and #4 position) snap flush with the head, causing a hiss-leak upstream of B2S1 (TSB 04-06-04-049 covers the bolt-and-gasket service kit).
- 2005-2009CTS/STS 3.6L LY7 sets P1153 when the passenger-side cam cover gasket leaks oil down onto the sensor connector.
- 2007-2012Acadia/Traverse/Enclave 3.6L gets P1153 from the timing chain stretch retarding Bank 2 cam timing past the correlation window.
- 2006-2010H3 3.5L/3.7L I5 sees P1153 from the cracked exhaust manifold (the single-piece casting is a known failure).
Estimated repair$120 to $900.
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