OBD-II Code
P0061
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)
$180–$620
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
P0061 means the heater circuit resistance on Bank 2 Sensor 3 is out of the plausibility window — same diagnostic logic as P0060 but on the third sensor of Bank 2, which only exists on multi-cat exhaust systems (typically European V8s with a pre-cat + mid-cat + post-cat sensor layout, or certain Asian V6/V8s with a four-O2 monitoring scheme).
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 procedureP0061 means the heater circuit resistance on Bank 2 Sensor 3 is out of the plausibility window — same diagnostic logic as P0060 but on the third sens…
P0061 means the heater circuit resistance on Bank 2 Sensor 3 is out of the plausibility window — same diagnostic logic as P0060 but on the third sensor of Bank 2, which only exists on multi-cat exhaust systems (typically European V8s with a pre-cat + mid-cat + post-cat sensor layout, or certain Asian V6/V8s with a four-O2 monitoring scheme).
Cheapest-first ladder
- confirm via FSM exhaust schematic that the vehicle actually has a Bank 2 Sensor 3 before parts-cannoning — verify the sensor location physically and identify the connector before tooling on the wrong one.
- Unplug Bank 2 Sensor 3 and measure heater element resistance with a DMM at known ambient temperature; a healthy heater reads 2-15 ohms cold (most OE sensors at 5-9 ohms), and an aged heater drifting toward open reads 15-50 ohms before going OL — that drift is what sets the resistance-plausibility code.
- Backprobe the supply pin with the connector reconnected and engine running warm; confirm 0.5-2.0A current draw at 12V. Check the connector pins for corrosion (which raises measured resistance without an actual element fault).
- The expensive misdiagnosis on P0061: shops replace what the scan tool labels Sensor 3 only to find the new OEM sensor still throws P0061 because the resistance fault was actually in the connector pins, not the element — clean the pins with electrical-contact cleaner and a pin-burnishing tool BEFORE condemning the sensor.
Vehicle-specific patterns2005-2011 Mercedes-Benz M273 5.5L V8 (E550, S550, CL550, ML550, GL550) is the most common P0061 platform — the Bank 2 multi-cat layout has three sens…
- 2005-2011Mercedes-Benz M273 5.5L V8 (E550, S550, CL550, ML550, GL550) is the most common P0061 platform — the Bank 2 multi-cat layout has three sensors per bank in export-market configurations, and the rear sensor (labeled Sensor 3) sees the most heat-soak fatigue.
- 2003-2010BMW N62 V8 in certain trim levels (especially long-wheelbase 7 Series and Alpina variants) ships four O2 sensors total and what BMW firmware calls Bank 2 Sensor 3 is the rear-bank mid-position sensor — the harness routes through the transmission tunnel and the connector pins corrode at the seam.
- 2008-2013Range Rover 5.0L V8 (Jaguar AJ-V8) sees P0061 from chronic underbody harness exposure on the Bank 2 rear connector.
- 2009-2014Audi 4.2L FSI V8 (RS5, S5 4.2) in certain markets carries a Sensor 3 designation on the secondary cat.
Estimated repair$180 to $620.
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