garajizOBD-II code · manufacturer-specific
P1643
Can Link ECM/INSTM Circuit / Network Malfunction
- System
- P1 — Powertrain (manufacturer-specific)
- Severity
- Moderate (3/5)
- Can I keep driving?
- Drive with caution
What does P1643 mean?
P1643 is defined as “Can Link ECM/INSTM Circuit / Network Malfunction”.
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.
- Jaguar: CAN Link Engine Control Module Transmission Control Module Circuit Network
- Volkswagen: Check DTC Memory Of Central ECU
- Buick, Cadillac, Chevrolet, GM, GMC, Oldsmobile, Saturn: Engine Speed Output Circuit
- Ford, Lincoln, Mercury: Fuel Pump Monitor Circuit Low Input
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This page is general information; an exact diagnosis needs measurements and a technician’s check.