Parts for your 2015 Ford Mondeo-Knock sensor

2015 Ford Mondeo knock sensor — what it does and when to replace it

Yes, the 2015 Ford Mondeo uses a knock sensor on its petrol engines. Technical references that confirm this include: Ford Workshop Manual (WSM) for the 2015 Mondeo/Fusion platform (Engine — 1.5L and 2.0L EcoBoost), which shows one or two block-mounted knock sensors (component code 12A699), Ford service information and DTC lists that include P0325 (Knock Sensor 1 circuit) and P0330 (Knock Sensor 2 circuit) for these engines, Ford parts catalogues listing the knock sensor for 2015 Mondeo petrol variants, and professional databases such as Autodata and Bosch ESI[tronic] noting closed-loop knock control on EcoBoost engines. Note: the 2.0 TDCi diesel variant does not use a conventional knock sensor.

On a 2015 Ford Mondeo with a 1.5L or 2.0L EcoBoost, the knock sensor is the quiet achiever that keeps the engine smooth and happy on Aussie and Kiwi fuel. It listens for “knock” (detonation) and lets the ECU trim ignition timing on the fly, protecting the motor and helping it deliver the best blend of power and economy. If the sensor can’t hear clearly, timing gets pulled back, the car can feel flat, and fuel use can creep up.

It’s not a routine service item, but it’s worth a check whenever the bonnet’s up for major work or there’s a drivability complaint. Typical signs of a knock sensor issue include a check engine light, sluggish performance, pinging under load, or unusually high fuel consumption. A scan showing codes like P0325 or P0330 is a strong hint.

Replacement is straightforward for a trained tech but is best done with care. The sensor needs a clean, flat mating surface on the engine block and must be torqued exactly to spec (over- or under-tightening can skew readings). It’s smart to fit a quality OEM-equivalent sensor and inspect the harness for heat or oil damage while you’re there. On some 2.0L EcoBoost setups there are two sensors—diagnose which bank is at fault before swapping parts. After replacement, clear codes and perform a proper road test so the ECU can relearn knock thresholds.

Preventative tips:

• Use the correct octane recommended for your Mondeo’s engine.
• Keep up with spark plug and intake system maintenance so the knock system isn’t working overtime.
• Fix any oil leaks that might contaminate sensor connectors.

For diesel Mondeo models (2.0 TDCi), the engine management strategy doesn’t rely on a traditional knock sensor, so this part isn’t fitted.

Popular questions about 2015 Ford Mondeo knock sensor

Does my 2015 Mondeo definitely have a knock sensor?
Petrol models (1.5L and 2.0L EcoBoost) do—some have one sensor, others have two. Diesel (2.0 TDCi) variants don’t use a conventional knock sensor. A technician can confirm by checking the engine code, live data and DTCs.

What symptoms point to a bad knock sensor on a Mondeo?
Common signs are a check engine light, pinging under load, lazy acceleration, and higher fuel use. Scan results showing P0325 or P0330 are typical on affected EcoBoost engines. Always rule out spark plugs, coils, and intake leaks first, as they can mimic knock issues.

Is the knock sensor a regular service item?
No. It’s replaced on condition. During major services or engine work, it’s worth inspecting the sensor and loom, verifying torque, and ensuring the mounting surface is clean. Using the recommended fuel and keeping ignition components fresh helps the sensor do its job.