Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSPEUGEOT1991405 S, 4D WAGON, 1.9 C, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEFUEL INJECTION/IGNITION SYSTEM ADJUSTMENTCODE DEFINITION
1991 Peugeot 405 S, 4D Wagon, 1.9 C, Automatic
Code Definition
1991 Peugeot 405 S, 4D Wagon, 1.9 C, AutomaticSECTION Code Definition
CODE DEFINITION
| Defect Code | Defective Component | Checks |
| 11 | End of Test Sequence | ***** |
| 12 | Beginning of Test Sequence | ***** |
| 13 | Air Temperature Sensor | Check defective componentsand its electrical circuit |
| 14 | Injector NTC Sensor | Check defective componentsand its electrical circuit |
| 21 | Throttle Switch (Idle Position) | Check defective componentsand its electrical circuit |
| 22 | Idle Regulation Electrovalve | Check defective componentsand its electrical circuit |
| 33 | Airflow Sensor | Check defective componentsand its electrical circuit |
| 34 | Canister Purge Electrovalve | Check defective componentsand its electrical circuit |
| 35 | Throttle Switch Unit (Full Load Position) | Check defective componentsand its electrical circuit |
| 42 | Injectors | Check defective componentsand its electrical circuit |
| 15 | Fuel Pump(s) Relay | Fuel pump controls |
| 43 | Detonation Correction Regulation (at Max.) | Detonation sensor, opera- tion of engine (temp., spark plugs, ...) |
| 44 | Detonation Sensor | Detonation sensor |
| 31, 32 | Self Correction Richness Regulation Function | Air leak at intake, Exhaust leak |
| 51 | Self Correction Richness Regulation Function | Lambda sensor electrical unit. Try again with new Lambda sensor |
| 52 | Self Correction Richness Regulation Function | Try again with new ECU |
| 53 | Battery Voltage | Charging system |
| 54 | ECU | Try again with new ECU |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.