P1621 — Fiat
P1621 — Fiat: Immobilzer code words do not match
Code breakdown
P — System
Powertrain (engine, transmission, fuel & emissions)
1 — Type
Manufacturer-specific
6 — Subsystem
Computer output circuit
Manufacturer-specific meanings (Fiat)
- FiatImmobilzer code words do not match
- PCM Memory Performance
- Immobilizer System Fault
- Engine Coolant Temperature Signal Short To Ground