Engine & fuel system
3 documented faults — symptoms, causes and workshop fixes.
Engine cranks but fails to start
Symptoms
Immobilizer warning lamp flashes.
Cause
Immobilizer read coil failure.
Repair
- Fit modified immobilizer read coil.
Parts3 parts
| Part | Part number | Qty |
|---|---|---|
| Read coil | 39730504G01 | Logo, Civic, Insight, HR-V |
| Read coil | 39730584A01 | Accord Coupe, S2000 |
| Read coil | 39730510G01 | CR-V |
Data: Motorwise Workshop. Bulletin 1.
Poor engine performance
Symptoms
Engine malfunction indicator lamp (MIL) illuminated. Trouble codes stored in engine control module (ECM) fault memory: 22-4.
Cause
Engine oil level incorrect.
Oil supply pressure to variable valve timing (VVT) system too low.
Repair
- Top up engine oil to correct level.
Data: Motorwise Workshop. Bulletin 2.
Poor starting
Symptoms
Excessive fuel consumption. Poor engine running.
Cause
Poor connection between battery earth lead and chassis earth point due to corrosion.
Repair
- Inspect earth lead for corrosion, replace if necessary.
Data: Motorwise Workshop. Bulletin 3.
Glossary
Technical terms used in this guide.
- MIL
- Malfunction indicator lamp — the engine warning light on the dashboard
- ECM
- Engine control module — the electronic unit that manages the engine
- Trouble Codes
- Standardised fault codes stored by the engine control module, read with a diagnostic tool
- Control Module
- A control unit for one of the vehicle's systems (engine, gearbox, brakes, body, and so on)
- Fault Memory
- The list of stored trouble codes in a control module
- Immobilizer
- The anti-theft system that prevents the engine from starting without the correct key
- Earth
- An electrical ground connection back to the battery or body
Frequently asked questions
What are the common faults with the Honda Accord Coupe 3.0?
This guide contains three workshop bulletins for the Honda Accord Coupe 3.0. Of these, three concern the engine and fuel system. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Honda Accord Coupe 3.0 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 Honda Accord Coupe 3.0 faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.