Alfa Romeo1992–1998

155 2.0 141 hp: Common faults & known problems

Common faults & known problems

3 known faults documented in workshop bulletins. Of these, three concern the engine and fuel system. Symptoms, causes, repair steps and part numbers are shown where supplied.

Technical specifications

Engine & fuel system

3 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 misfire

Water/oil ingress into spark plug orifice. Fix: clean and lubricate.

Overview

Affects: All models.
Remedy: Clean & lubricate

Symptoms

Engine malfunction indicator lamp (MIL) illuminated. Poor cold starting. Poor engine running.

Repair steps

Clean ignition coil and spark plug orifice.
Check spark plugs for insulator damage or arcing.
Check cylinder head cover for leaks.

Data: Motorwise Workshop. Bulletin 2.

Engine malfunction indicator lamp (MIL) illuminated

Affects All models with petrol engines.P0325P1325

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 3.

Glossary

Technical terms used in this guide.

MIL: Malfunction indicator lamp — the engine warning light on the dashboard
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 2.0?

This guide contains three workshop bulletins for the Alfa Romeo 155 2.0. Of these, three concern the engine and fuel system. Symptoms, causes, repair steps and part numbers are shown where supplied.

Does every Alfa Romeo 155 2.0 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 2.0 faults myself?

Many of them. The documented symptoms can be seen, heard or felt during a test drive.