P2044 on 2016-2021 Opel Movano — Reductant Temperature Sensor Circuit Low
1 vehicles · 1 makes · $250-$1,500 repair
How to diagnose and fix P2044: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Opel Movano · 2016–2021
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.
Common Symptoms
- AdBlue warning with a remaining-range countdown (typically 1,500-2,400 miles)
- Emission system fault message and reduced power / limp mode
- Engine will not restart once the start countdown reaches zero
- Repeat AdBlue faults returning shortly after a repair
How to Fix
Diagnose before replacing parts: read live NOx sensor data and AdBlue rail pressure rather than fitting parts to the code. Typical repairs are a NOx sensor (approx. GBP 250-500), AdBlue injector (GBP 300-600), AdBlue pump (GBP 400-700) or SCR catalyst (GBP 800-1,500+). Clear the start countdown properly with the fault fixed. Prevention: use only fresh, in-date AdBlue to ISO 22241, never top up with water or screenwash, and give short-trip vans a regular motorway run so the injector runs hot enough to avoid crystallisation.
Sources for this issue (3)
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P2044 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P2044 mean?
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.
What are the most common causes of P2044?
The most common causes of P2044 are: Short to ground in the signal circuit, Faulty reductant temperature sensor, Corroded or shorted connector, Damaged wiring harness, PCM/dosing control module fault. The specific cause varies by vehicle.
How much does it cost to fix P2044?
Repair costs for P2044 range from $250 to $1,500, depending on the vehicle and root cause.
Which vehicles are affected by P2044?
Au7o has documented P2044 across 1 vehicle models from 1 manufacturers: Opel.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.