Cold Start Off – cold start modification in the ECU software
Software modification of the cold start strategy (Cold Start Off) in the engine control unit: suppression of the raised idle and the noisy catalyst heating phase after a start on supported petrol engines.
The modification changes only the behaviour after a cold start; normal engine operation stays unchanged. The file is prepared for the exact software version.
Requests are submitted from a DR-files account. If you are not signed in, you will be asked to sign in or register first. The selected service is kept.
Service details
The raised idle after a start serves the fast heating of the catalyst. Suppressing it affects the behaviour after a cold start; the emission context and the use of the vehicle are assessed in the request.
Required information
- Vehicle manufacturer, model, year and engine code
- ECU manufacturer, hardware and software number (if known)
- Complete original file read from the control unit, the tool and the read method used
- Description of the requested behaviour after a start (rpm, length of the heating phase)
Typical workflow
- 01Choose the service and enter the vehicle and control unit details.
- 02Upload the original file.
- 03Fixed prices are charged from your credits when you submit; other prices are confirmed in the request and charged when you accept them.
- 04The file is prepared and delivered in your account.
Technical notes
- The fixed price in credits is deducted when the request is submitted. The file is prepared for the exact software version and checked before delivery.
- The modification affects the catalyst heating phase after a cold start; the emission context and the use of the vehicle are assessed in the request.
Frequently asked questions
What exactly does Cold Start Off change?
It suppresses or shortens the phase of raised idle and adjusted ignition timing after a cold start that serves the catalyst heating. The normal temperature correction of the mixture and the idle remain.
What is needed for the request?
The complete original file read from the control unit, the hardware and software number and a description of the required function. You select the service when uploading the file and see the price in credits before submitting.
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