garajizOBD-II code · manufacturer-specific
P1781
Ignition Retard Request Duration Fault
- System
- P1 — Powertrain (manufacturer-specific)
- Severity
- Moderate (3/5)
- Can I keep driving?
- Drive with caution
What does P1781 mean?
P1781 is defined as “Ignition Retard Request Duration Fault”.
Drive gently and only as far as you need to; have it checked as soon as possible.
Manufacturer-specific meanings
The same code can mean something different on some makes.
- Citroen, Diğer, Peugeot: 4X4 Switch Out of Self Test Range
- Ford, Lincoln, Mercury: 4x4 Low Switch is Out of Self-Test Range
- Volkswagen: Engine Torque Reduction Open Short To Ground
- Mazda, Nissan: Transmission 4x4 Low Switch Out Of Range Fault
- Mercedes-Benz: Upshift Delay Switchover Valve ATCC Y35
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This page is general information; an exact diagnosis needs measurements and a technician’s check.