Renault OBD Codes
decoded & explained
The codes Renault and Dacia drivers actually see — A/C relay, fuel pressure, misfires and sensors — with clear causes and fixes.
Renault check engine light codes
Renault and Dacia use standard OBD-II engine codes. Renault’s Clip/Can Clip tool unlocks deeper modules, but generic scanners cover the vast majority of engine faults.
Here are the P-codes most reported on Clio, Mégane, Duster and other Renault/Dacia models.
OBD-II code decoder
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Most common Renault
Common Renault/Dacia faults behind these codes.
| Code | Description |
|---|---|
| P0087 | Fuel Rail Pressure Too Low |
| P0171 | System Too Lean (Bank 1) |
| P0300 | Random/Multiple Cylinder Misfire |
| P0335 | Crankshaft Position Sensor Circuit |
| P0401 | EGR Flow Insufficient |
| P0420 | Catalyst System Efficiency Below Threshold (Bank 1) |
| P0442 | EVAP System Small Leak Detected |
| P0645 | A/C Clutch Relay Control Circuit |
Common Renault faults
Common Renault/Dacia faults behind these codes.
A/C clutch relay (P0645) — a classic Renault fault affecting air conditioning on Clio and Mégane.
Fuel pressure too low (P0087) — fuel pump wear, especially on diesel models.
Misfires (P0300) — coils and plugs on petrol engines.
Lean mixture (P0171) — vacuum leaks or a dirty MAF.
Crank sensor (P0335) — the engine will often stall or refuse to start.
Renault FAQ
What is P0645 on a Renault?
Why does my Renault show P0087?
Is a misfire code serious?
Can I read Renault codes with a phone?
What does the orange engine light mean?
Codes vary slightly by model, year and engine. Always confirm with a proper diagnosis. Manufacturer-specific codes (P1xxx/P2xxx) may differ from generic descriptions.
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Decode your Renault code now
Use the free decoder below, or browse the most common Renault codes.