P2044 on Opel
Reductant Temperature Sensor Circuit Low
P2044 on Opel vehicles indicates reductant temperature sensor circuit low. Au7o has documented this code across 1 Opel model — most commonly on Movano. Set when the PCM detects the reductant (DEF) temperature sensor signal voltage is lower than expected, typically indicating a short to ground or a failed sensor. Typical repair costs on Opel range from $250 to $1,500, depending on the specific model and root cause.
Common Causes of P2044
- •Short to ground in the signal circuit
- •Faulty reductant temperature sensor
- •Corroded or shorted connector
- •Damaged wiring harness
- •PCM/dosing control module fault
P2044 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 P2044 across all makes →Frequently Asked Questions
What does P2044 mean on Opel?▼
P2044 stands for "Reductant Temperature Sensor Circuit Low." Set when the PCM detects the reductant (DEF) temperature sensor signal voltage is lower than expected, typically indicating a short to ground or a failed sensor. On Opel specifically, this code is documented across 1 model.
What causes P2044 on Opel vehicles?▼
Common causes on Opel: Short to ground in the signal circuit, Faulty reductant temperature sensor, Corroded or shorted connector, Damaged wiring harness, PCM/dosing control module fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2044 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 P2044 documented?▼
Au7o has documented P2044 on 1 Opel model: Movano.