The code P20EE is a diagnostic trouble code associated with diesel vehicles equipped with an AdBlue SCR emission control system. Renault and Dacia generally sell these diesel engines under the name Blue dCi. The information gathered on this site concerns a specific question: which models may be affected, and how to know whether your car is one of them.
Models concerned by the P20EE reports
The following models are cited when P20EE is discussed in relation to Blue dCi engines:
- Renault: Clio, Captur, Mégane, Scénic, Kadjar
- Dacia: Duster, Sandero, Logan
Not every version of these models is concerned. The affected powertrains are diesel Blue dCi versions equipped with an SCR/AdBlue system. Because a single Blue dCi motorisation is installed in several models sharing the same platform, the same fault code can appear on different nameplates.
Why identifying the engine matters
If the Anti-pollution message appears and code P20EE is read, the underlying repair is not always limited to the AdBlue injector. Crystallization can clog the injector in the exhaust line. The reports on this site mention an engine-lock countdown of 1,000 km; the English version states 600 miles. In the cases described, cleaning or replacing the injector does not fully solve the problem, because the engine ECU is locked in such a way that the countdown may continue until a software reset is performed — and owners report being sent back to the dealer for it.
For that reason, the first verification is not the model name; it is the engine designation. The registration document (carte grise) identifies the engine. If the vehicle has a Blue dCi diesel, it belongs to the population covered by these reports. If it is a petrol version or a non-SCR diesel, P20EE does not apply in the same way.
Practical steps and legal avenue
Owners in Europe who encounter this situation should keep their maintenance and repair records. If a garage replaces the AdBlue injector but the lockout persists, document the chronology. Depending on your country, the relevant legal framework may be consumer protection and hidden-defect law.
This site maintains an independent registry of reported cases. If you have been affected by the P20EE with a Blue dCi engine and the post-repair software lockout, you can report your situation at adblue-haldex.com. The registration is used to build a factual dossier; no product is sold.
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