Engine & fuel system
6 documented faults — symptoms, causes and workshop fixes.
Poor idling
Symptoms
Failure to start.
Cause
Engine control module (ECM) software fault.
Repair
- Install upgraded engine control module (ECM) software.
Data: Motorwise Workshop. Bulletin 2.
Engine malfunction indicator lamp (MIL) illuminated
Symptoms
Engine control module (ECM) in limp home mode. Trouble code stored: P0400.
Cause
Engine control module (ECM) software fault.
Repair
- Install upgraded engine control module (ECM) software.
Data: Motorwise Workshop. Bulletin 3.
Poor cold starting
Overview
- Affects
- All models with 1CD-FTV engine code.
- Fault codes
P0380- Remedy
- Software update
Symptoms
Trouble code stored: P0380.
Cause
Defective glow plugs.
Repair
- Check glow plugs, replace as necessary.
- Re-program ECM with modified software.
Data: Motorwise Workshop. Bulletin 4.
Intermittent power loss on acceleration
Exhaust gas recirculation (EGR) valve not operating properly. Fix: re-program with updated software.
Overview
- Affects
- All models.
- Remedy
- Software update
Symptoms
Engine jerking.
Repair steps
- Check air filter, replace if required.
- Check mass air flow (MAF) sensor, replace if required.
- Clean exhaust gas recirculation (EGR) valve and associated parts.
- Re-program ECM with modified software.
Data: Motorwise Workshop. Bulletin 5.
Poor starting from cold
Overview
- Affects
- All models.
- Fault codes
P0380C1201- Remedy
- Fit new part
Symptoms
Trouble codes stored: P0380, C1201.
Cause
Defective glow plugs.
Engine control module (ECM) software fault.
Repair steps
- Fit new glow plugs.
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Re-program ECM with upgraded software.
Parts
| Part | Part number | Qty |
|---|---|---|
| Glow plug | 19850-27010 | 4 |
Data: Motorwise Workshop. Bulletin 7.
Sudden power loss on acceleration
Symptoms
Trouble code stored in engine control module (ECM) fault memory: 78 (2), 78 (8), P0627.
Cause
Fuel flow control valve faulty.
Repair
- Fit modified fuel flow control valve.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Fuel flow control valve | 04221-27011 | 1 |
Data: Motorwise Workshop. Bulletin 9.
Brakes
1 documented fault — symptoms, causes and workshop fixes.
Brakes squeal
Overview
- Affects
- All models.
Cause
Replacement brake pads fitted without anti-squeal shims.
Repair
- Ensure brake pad anti-squeal shims are fitted.
- Replacement shims available separately.
Data: Motorwise Workshop. Bulletin 1.
Steering
1 documented fault — symptoms, causes and workshop fixes.
ESP warning lamp illuminated
Incorrect calibration of steering angle sensor.
Overview
- Affects
- All models with electronic stability program (ESP).
- Fault codes
C1288
Symptoms
Trouble code stored: C1288. Unable to program steering angle sensor.
Repair steps
- Ensure steering in straight-ahead position.
- Ensure steering angle sensor aligned with steering column.
- Carry out steering angle sensor calibration.
Data: Motorwise Workshop. Bulletin 8.
Air conditioning & heating
1 documented fault — symptoms, causes and workshop fixes.
Musty odour from air conditioning (AC) when operating
Overview
- Affects
- All models with air conditioning (AC).
- Remedy
- Fit modified part
- Parts
- 3 parts
Cause
Faulty AC evaporator temperature sensor.
Faulty AC amplifier.
Repair
- Models with ATC: Fit modified AC evaporator temperature sensor. Fit modified AC amplifier.
- Models with MTC: Fit modified AC evaporator temperature sensor. Fit auxiliary wiring harness between AC evaporator temperature sensor and AC wiring harness.
Parts3 parts
| Part | Part number | Qty |
|---|---|---|
| AC evaporator temperature sensor | 88620-12080 | 1 |
| AC amplifier | 88650-12A11 | 1 |
| Auxiliary wiring harness | 22648-12750 | 1 |
Data: Motorwise Workshop. Bulletin 6.
Glossary
Technical terms used in this guide.
- ECM
- Engine control module — the electronic unit that manages the engine
- EGR
- Exhaust gas recirculation — feeds some exhaust gas back into the intake to cut emissions
- Trouble Codes
- Standardised fault codes stored by the engine control module, read with a diagnostic tool
- AC
- Air conditioning — the system that cools the cabin
- ATC
- Automatic temperature control — climate control that holds the temperature you set
- ESP
- Electronic stability programme — brakes individual wheels to stop a skid
- MAF
- Mass air flow — a sensor that measures how much air the engine is breathing
- 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
- Glow Plugs
- Heaters that help a diesel engine start from cold
- Limp Home
- A protective mode that limits power so the vehicle can be driven to a workshop
- Re-Program
- Update the software on a control module using the manufacturer's diagnostic tool
- Steering Angle Sensor
- Tells the stability-control system which way the steering wheel is pointing
- Trouble Code
- A standardised fault code stored by a control module, read with a diagnostic tool
- Wiring Harness
- The bundled cables that carry power and signals around the vehicle
- Calibration
- Setting a sensor or module so its readings match the real world
- Evaporator
- The air-conditioning heat exchanger in the dashboard that cools the cabin air
- Recirculation
- Air-conditioning mode that recirculates cabin air instead of drawing in outside air
Frequently asked questions
What are the common faults with the Toyota Corolla 2.0 D-4D?
This guide contains nine workshop bulletins for the Toyota Corolla 2.0 D-4D. Of these, six concern the engine and fuel system and one the brakes. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Toyota Corolla 2.0 D-4D 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 Toyota Corolla 2.0 D-4D faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.