Engine & fuel system
2 documented faults — symptoms, causes and workshop fixes.
Engine misfire/hesitation on idle
Ignition coil low tension wiring trapped under ignition coil cover.
Overview
- Affects
- All models, 1994-97.
Repair steps
- Repair and re-route damaged wiring.
- If necessary, de-bur edges of ignition coil cover.
- Fit cable tie to No.4 HT lead.
Data: Motorwise Workshop. Bulletin 1.
Engine malfunction indicator lamp (MIL) illuminated
Symptoms
Trouble codes stored: P0325, P1325.
Cause
Knock sensor (KS) fault.
Repair
- Check wiring connector and resistance of KS. Replace parts as necessary.
Data: Motorwise Workshop. Bulletin 2.
Glossary
Technical terms used in this guide.
- Trouble Codes
- Standardised fault codes stored by the engine control module, read with a diagnostic tool
- HT Lead
- High-tension lead — the spark-plug wire that carries the ignition spark
- KS
- Knock sensor — listens for engine knock so the engine control module can retard the timing
Frequently asked questions
What are the common faults with the Alfa Romeo 155 1.7?
This guide contains two workshop bulletins for the Alfa Romeo 155 1.7. Of these, two concern the engine and fuel system. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Alfa Romeo 155 1.7 have these faults?
No. These are patterns documented across the model by workshops, not predictions for an individual vehicle. Where a fault applies only to certain vehicles or VIN ranges, that is listed with the fault.
Can I check for Alfa Romeo 155 1.7 faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.