Parts for your 2016 Ford Falcon-Oxygen sensor

2016 Ford Falcon oxygen sensor — what it does and when to service it

Technical sources confirm the 2016 Ford Falcon is fitted with heated oxygen sensors (HO2S). Ford’s FG X Falcon workshop material for the Powertrain Control/Emissions Diagnosis describes upstream and downstream HO2S used for closed‑loop fuel control and catalyst monitoring, and the model’s Euro 5/ADR 79/04 compliance requires on-board diagnostics and post‑catalyst monitoring that rely on oxygen sensors. In practice, most 2016 FG X inline‑six models run two sensors (one before and one after the catalytic converter), while the XR8 V8 uses four (two per bank).

On the 2016 Falcon, the oxygen sensor measures the oxygen content in the exhaust so the engine control module can fine‑tune the air–fuel mix. The upstream sensor helps the engine run smoothly and efficiently, while the downstream sensor keeps tabs on catalytic converter health. Together they trim fuel use, keep emissions in check, and help the Barra or Coyote feel crisp on the throttle.

As a wear item exposed to heat, moisture and contaminants, an ageing HO2S can drift out of spec. Owners may notice the check engine light, higher fuel use, a rough idle, sulphur-like smells from the exhaust, or a failed rego emissions check. Fault codes such as P0130–P0135 (Bank 1 Sensor 1), P0150–P0155 (Bank 2 Sensor 1 on V8s), P0137–P0141 or P0160–P0161 point the diagnosis toward an oxygen sensor circuit or heater, P0420/P0430 indicate the catalyst but often rely on the downstream sensor’s data.

Good servicing practice on a 2016 Falcon includes:

• Visual checks at service intervals for chafed wiring, loose connectors and exhaust leaks ahead of the sensor.
• Scan-tool review of fuel trims and sensor activity, lazy switching or pegged readings warrant closer testing.
• Preventative replacement around 120,000–160,000 kilometres if drivability or trims suggest ageing, especially on vehicles doing short trips.
• When replacing: let the exhaust cool, use the correct O2 sensor socket, don’t twist the loom, avoid contaminating the tip, and follow the Ford workshop torque specification. Many new sensors arrive with anti‑seize pre‑applied to the threads—if so, don’t add more.
• After installation, clear DTCs and complete a proper drive cycle so the ECU relearns trims and catalyst monitors run to completion.

LPG EcoLPi and turbo variants still rely on HO2S for closed‑loop operation, so keeping sensors healthy pays back in smoother running and fewer trips to the bowser.

Technical sources referenced: Ford Falcon FG X Workshop Manual (Powertrain Control/Emissions Diagnosis, Fuel Charging and Controls — Heated Oxygen Sensor), ADR 79/04 (Euro 5 equivalent) emissions and OBD requirements, and general OEM HO2S service practices published by major sensor manufacturers.

Popular questions

How many oxygen sensors does a 2016 Ford Falcon have?
Most FG X inline‑six Falcons (petrol and EcoLPi) use two sensors: one upstream (pre‑cat) and one downstream (post‑cat). The XR8 V8 runs four—two per bank, handling both mixture control and catalyst monitoring. Build spec can vary, so the quickest check is by VIN or a look under the car for bungs ahead of and after the catalytic converters.

What fault codes point to a bad oxygen sensor on a 2016 Falcon?
Common codes include P0130–P0135 (Bank 1 Sensor 1 circuit/heater), P0150–P0155 (Bank 2 Sensor 1 on V8s), P0137/P0138 (low/high voltage), and P0141 or P0161 (heater performance on downstream sensors). P0420/P0430 relate to catalyst efficiency but are evaluated using the rear sensor’s data—so a failing downstream sensor can mislead the diagnosis. Proper testing with a scan tool is recommended before replacing parts.

Can an oxygen sensor be cleaned, or should it just be replaced?
Cleaning generally doesn’t restore accurate operation and can damage the sensing element. If testing shows a lazy response, heater failure, or wiring faults, the reliable fix is repair of the loom or replacement with the correct spec sensor. Also address any exhaust leaks and misfires first, as they can quickly ruin a new HO2S or the catalyst.