P0746 on Opel: How to Diagnose & Fix
Pressure Control Solenoid Performance/Stuck Off
1 Opel model · 1 documented issue · 1 critical · $150-$2,500 repair
P0746 on Opel by model: symptoms, diagnosis and fix
The Aisin AF40 6-speed automatic in Insignia A (2008-2017) develops harsh shifts, shudder during lock-up, and delayed engagement, typically by 100,000-160,000 km. Root cause is degraded ATF and worn solenoids; Opel's "lifetime fill" claim is widely disputed.
Common Symptoms
- harsh shifts
- shudder at light throttle
- delayed engagement
- limp mode
How to Fix
Drain-and-fill ATF every 60,000 km using Aisin JWS3309 / Dexron VI-compatible fluid (~€150-€250 DIY). Solenoid pack replacement if shifts remain harsh (€500-€900). Full mechatronic / valve body rebuild €1,500-€2,500. Severe shudder may indicate torque converter wear.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Aisin ATF-93001 AW-1 transmission fluid 1 L
Confirm VIN, transmission tag, quantity and level procedure.
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P0746 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 P0746 mean on a Opel?
P0746 stands for "Pressure Control Solenoid Performance/Stuck Off." P0746 means the transmission's pressure control solenoid 'A' is performing poorly or appears stuck in the off (low pressure) position. This solenoid regulates hydraulic line pressure that applies clutches and bands to make smooth, firm shifts; the TCM detects when commanded pressure changes aren't producing the expected response. A stuck-off condition typically means line pressure stays low. You may experience slipping, soft or delayed shifts, harsh engagement, overheating, or the transmission entering limp mode. On Opel it is documented across 1 model: Insignia.
What are the most common causes of P0746?
The most common causes of P0746 are: Low, dirty, or degraded transmission fluid, Faulty pressure control / EPC solenoid, Clogged valve body passages or stuck valve, Wiring or connector fault at the solenoid, Internal transmission wear (worn clutches, leaking seals), Dirty or clogged transmission filter, Faulty transmission control module (less common). The specific cause varies by vehicle.
How much does it cost to fix P0746 on a Opel?
Published repair estimates on Opel range from $150 to $2,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0746 on a different make?
View P0746 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.