P0203 on Dacia
Injector Circuit/Open - Cylinder 3
P0203 on Dacia vehicles indicates injector circuit/open - cylinder 3. Au7o has documented this code across 1 Dacia model — most commonly on Sandero. This code means the Engine Control Module detected an electrical problem (open circuit or out-of-range resistance) in the fuel injector control circuit for cylinder 3. The ECM pulses each injector electrically and watches the circuit to verify it is operating. P0203 means the expected feedback for cylinder 3's injector is missing or abnormal, so that cylinder may not be fueling properly. The typical result is a misfire, rough idle, and reduced performance traceable to cylinder 3. Typical repair costs on Dacia range from $250 to $4,000, depending on the specific model and root cause.
Common Causes of P0203
- •Damaged or corroded injector connector at cylinder 3
- •Open or shorted wiring in the injector control circuit
- •Failed (electrically open) fuel injector on cylinder 3
- •Loose or backed-out connector pin
- •Poor ground or power feed to the injector
- •Faulty injector driver inside the ECM/PCM
- •Chafed harness causing intermittent open
P0203 on Dacia by Model
Dacia Sandero(1 issue)
- Sandero / Duster 1.5 dCi K9K Bosch CP1 Injector Failure2008-2020
The K9K 1.5 dCi diesel — used across Dacia Sandero, Duster, Logan, plus Renault Clio/Captur/Kadjar, Nissan Note/Juke — suffers Bosch CP1 high-pressure pump and injector failure typically at 100,000-180,000 km. Worst case: pump self-destructs and sends metal particles through the entire fuel system, requiring full rail+pump+injector replacement (€2,500-€4,000).
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View P0203 across all makes →Frequently Asked Questions
What does P0203 mean on Dacia?▼
P0203 stands for "Injector Circuit/Open - Cylinder 3." This code means the Engine Control Module detected an electrical problem (open circuit or out-of-range resistance) in the fuel injector control circuit for cylinder 3. The ECM pulses each injector electrically and watches the circuit to verify it is operating. P0203 means the expected feedback for cylinder 3's injector is missing or abnormal, so that cylinder may not be fueling properly. The typical result is a misfire, rough idle, and reduced performance traceable to cylinder 3. On Dacia specifically, this code is documented across 1 model.
What causes P0203 on Dacia vehicles?▼
Common causes on Dacia: Damaged or corroded injector connector at cylinder 3, Open or shorted wiring in the injector control circuit, Failed (electrically open) fuel injector on cylinder 3, Loose or backed-out connector pin, Poor ground or power feed to the injector. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0203 on a Dacia?▼
Repair costs on Dacia range from $250 to $4,000, depending on the specific model and root cause.
Which Dacia models have P0203 documented?▼
Au7o has documented P0203 on 1 Dacia model: Sandero.