Powertrain, generic · Fuel and air metering

P0164 O2 Sensor Circuit High Voltage Bank 2 Sensor 3

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modeNo

Sensor 3 on bank 2 is a switching oxygen sensor behind a second converter or converter brick. It is rare – documented for Jaguar Land Rover's supercharged V6 and V8 (2013–2016), where it is the 'post-cat' sensor of the second bank, and for Ford systems that monitor part of the converter volume. P0164 means the signal is above about 1.05–1.15 V. A switching sensor can produce at most about 1 V, so anything higher is electrical: a short to voltage or to the heater wire, or – on GM's bias logic – an open ground. Ford's over-voltage test (above 1.1 V for 10 s) explicitly covers downstream sensors 2 and 3. Jaguar Land Rover assigns the code to that sensor and names software (fixed by reconfiguring the engine module) and water-induced thermal shock as causes; no thresholds are published for sensor 3, so the logic follows the sensor 2 checks. When it fails, the downstream evaluation of that converter is suspended; there is no limp mode.

Likely causes

Signal wire shorted to voltage or to the heater wire

Sensor faulty internally (heater-to-signal short)

Sensor ground open (GM logic)

Engine module software (Jaguar Land Rover)

Symptoms

Check engine light on (usually after two drive cycles)
Catalyst readiness incomplete
Usually no noticeable change in driving

Repair estimate

DifficultyEasyDIY possible

Parts and labour€60–300

Time0.3–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

oxygen sensor bank2 sensor3oxygen sensor wiringcatalytic converter

Related codes

P0144 P0158 P0162 P0163 P0167

References: law.cornell.edu, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.