The starter turns the engine, but it will not run. Another car may stop unexpectedly and restart once it has cooled. When P0322 appears in the scan, those two descriptions are useful starting points; they should not disappear behind the words “needs an ECU”.
What the VAG reference identifies
Ross-Tech describes P0322, also recorded as 16706 or 000802, as a missing G28 engine-speed signal. It notes that G28 also provides a crankshaft-position reference. Its guidance includes checking the sensor and wiring, with a warning that oil or coolant can travel into the harness and affect the controller. Read the Ross-Tech reference.
That is a diagnostic direction for the stated system, not a finding that every vehicle with P0322 has a damaged ECU.
Give the technician the sequence
- Does the starter turn normally, slowly or not at all?
- Did the engine stop while driving, or fail to start after parking?
- Does the scan tool show an engine-speed value during the failed start?
- Have there been coolant leaks, sensor replacements or harness repairs?
Ask the garage to retain any signal capture and identify where it was measured. A trace at the sensor and a trace at the ECU connector answer different questions. A number in a live-data list also needs its test conditions recorded.
Before sending the controller
If contamination is suspected, include clear photographs taken during a professional inspection and the original repair history. Repairing a removed ECU without addressing a vehicle-side problem may leave the cause unresolved. Avoid repeated road tests of a vehicle that cuts out unexpectedly; arrange recovery where required.
Send AXION the full fault report before removing a module. Owners and garages across the UK can discuss suitable postal work; vehicle testing takes place by appointment at Didcot.
Reviewed September 2026. Use the complete manufacturer-specific fault description and vehicle repair information.