P2203 on Opel
NOx Sensor Circuit High (Bank 1)
P2203 on Opel vehicles indicates nox sensor circuit high (bank 1). Au7o has documented this code across 1 Opel model — most commonly on Movano. Generic code. The module detects a voltage in the Bank 1 NOx sensor circuit that is above the normal operating range. A persistently high signal usually indicates a short to voltage, an open in the circuit pulling the reading high, or an internal sensor fault. Typical repair costs on Opel range from $250 to $1,500, depending on the specific model and root cause.
Common Causes of P2203
- •Signal wire shorted to a voltage source
- •Open circuit causing the input to float high
- •Failed NOx sensor / sensor control module
- •Corroded or damaged connector
- •Wiring damage from heat or chafing near the exhaust
P2203 on Opel by Model
Opel Movano(1 issue)
- AdBlue/SCR failures on 2.3 dCi: NOx sensor decay and injector crystallisation trigger a no-start countdown2012-2023
Euro 5 and Euro 6 Movano vans with the 2.3 dCi engine (shared architecture with the Renault Master and Nissan NV400) suffer well-documented SCR faults. The dominant failure modes are upstream/downstream NOx sensor degradation on higher-mileage vans, crystallised urea blocking the AdBlue injector on vehicles used for short trips, SCR catalyst contamination from incorrect fluid, and less commonly AdBlue pump or pressure faults. Once a fault is logged the van begins counting down remaining engine starts and will refuse to restart when the counter reaches zero, which strands a working vehicle. Typical codes are P20EE, P207F, P2202/P2203, P204F, P2044 and P2BAD/P2BAE.
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View P2203 across all makes →Frequently Asked Questions
What does P2203 mean on Opel?▼
P2203 stands for "NOx Sensor Circuit High (Bank 1)." Generic code. The module detects a voltage in the Bank 1 NOx sensor circuit that is above the normal operating range. A persistently high signal usually indicates a short to voltage, an open in the circuit pulling the reading high, or an internal sensor fault. On Opel specifically, this code is documented across 1 model.
What causes P2203 on Opel vehicles?▼
Common causes on Opel: Signal wire shorted to a voltage source, Open circuit causing the input to float high, Failed NOx sensor / sensor control module, Corroded or damaged connector, Wiring damage from heat or chafing near the exhaust. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2203 on a Opel?▼
Repair costs on Opel range from $250 to $1,500, depending on the specific model and root cause.
Which Opel models have P2203 documented?▼
Au7o has documented P2203 on 1 Opel model: Movano.