“It turns over but will not start” tells a workshop more than “the ECU is dead”. Before discussing a replacement controller, distinguish normal cranking, slow cranking and no cranking. Also say whether the engine cuts out after running or never starts at all.
The relevant Tucson example
HELLA documents petrol Tucson models from 2004–2010 with poor starting, stalling or misfiring and codes P0320, P0321, P0322 or P0323. Its example points to an intermittent crankshaft-sensor signal and calls attention to connector condition as well as the sensor. It does not establish that every Tucson carrying one of these codes has the same defect.
What to send with the report
- The engine identification and exact code descriptions from the scanner.
- Whether the fault occurs hot, cold or after a period parked.
- Whether it is present during the workshop visit or only in stored history.
- Any previous sensor replacement, connector repair or loom work.
For a garage referral, include the test conditions alongside the results. “Signal checked” does not tell us enough. Was it checked while the engine refused to start, or later when it was running normally? Preserve the original scan before clearing anything.
Discuss an ECU or wiring assessment with AXION. Keep the original ECU until its identity and the proposed assessment route have been agreed. If the engine stalls unpredictably, arrange a safe recovery rather than driving it to demonstrate the fault.
Use the full fault description from your scan and the repair information for your vehicle.