Parts for your 2020 Ford Transit-Knock sensor

2020 Ford Transit knock sensor — is it used?

Short answer: it depends on the engine. Ford’s own service information shows a knock sensor is fitted to 2020 Transit models with the petrol V6 engines (3.5L PFDI and 3.5L EcoBoost). The Ford Workshop Manual for those engines includes knock sensor removal/installation and diagnostics (with DTCs such as P0325–P0334), and the Ford parts catalogue lists a dedicated knock sensor for these variants. By contrast, the 2020 Transit sold in Australia and New Zealand is predominantly the 2.0L EcoBlue turbo‑diesel. In Ford’s diesel engine management documentation for that platform, a conventional knock sensor isn’t listed among monitored components, and there are no diesel-specific knock‑sensor procedures. That aligns with common diesel practice across OEMs.

Why the difference? A petrol engine uses spark ignition, so the ECU needs a knock sensor to detect abnormal combustion (“pinging”) and pull timing to protect the engine. A modern diesel is compression‑ignition and doesn’t run spark, combustion phasing is controlled with injection timing, rail pressure and boost. What’s often called “diesel knock” is typically normal combustion noise. Because of this, Ford’s 2.0L EcoBlue strategy doesn’t rely on a traditional block‑mounted knock sensor. Instead, it manages combustion using other inputs.

On a 2020 Transit 2.0L EcoBlue (the usual AU/NZ fitment), a knock sensor isn’t relevant to servicing. If a scan tool shows knock‑sensor DTCs on a diesel Transit, it’s usually the wrong engine profile selected in the tool, generic OBD lists being misapplied, or a mislabelled fault. For local owners, that means there’s no knock‑sensor item to replace or maintain on routine servicing.

What does the diesel actually watch to keep things healthy? The ECU leans on:

• Crank and cam position sensors for precise injection timing
• Fuel rail pressure and injector control for combustion shaping
• MAP/MAF, boost control, IAT and EGT sensors to manage airflow and temperatures

If you’re running a petrol V6 Transit (common in North America and some private imports), that vehicle does have a knock sensor and knock‑related maintenance/diagnosis applies as per the Ford Workshop Manual. For AU/NZ‑spec diesels, it doesn’t.

FAQs

Does a 2020 Ford Transit in Australia or New Zealand have a knock sensor?
Most local 2020 Transits are 2.0L EcoBlue turbo‑diesels, which don’t use a conventional knock sensor. Ford’s diesel service information lists no knock‑sensor diagnostics for that engine, reflecting typical diesel control strategy.

Which 2020 Transit engines do use a knock sensor?
The petrol V6 options (3.5L PFDI and 3.5L EcoBoost) include a block‑mounted knock sensor, as documented in the Ford Workshop Manual and parts catalogues for those engines. The ECU uses it to detect knock and adjust ignition timing.

My scan tool shows P0325/P0330 on a 2020 Transit diesel — is the knock sensor faulty?
Unlikely. Those codes apply to petrol engines with knock sensors. On a diesel Transit, this usually points to the wrong engine profile in the scan tool or a generic OBD list being applied. Re‑select the exact engine and model year, then re‑scan.