P0742 on Volvo: How to Diagnose & Fix
Torque Converter Clutch Circuit Stuck On
3 Volvo models · 3 documented issues · 1 critical · $300-$5,000 repair
P0742 on Volvo by model: symptoms, diagnosis and fix
The Aisin AW55-50SN and AW55-51SN automatic transmissions used in the XC70 develop solenoid failures and internal clutch wear, typically between 100,000-150,000 miles. The transmission solenoids (particularly the SL1 and SL2 linear solenoids) lose calibration and stick, causing harsh shifting, delayed engagement, and slipping. The valve body accumulates wear debris that causes erratic shifting. In severe cases, the forward or reverse clutch packs burn out, requiring a complete rebuild or replacement. Regular fluid changes significantly extend transmission life.
Common Symptoms
- Harsh or delayed 1-2 and 2-3 upshifts
- Transmission slipping under load
- Delayed engagement when shifting into Drive or Reverse
- Check engine light with transmission codes (P0740, P0741, P0743)
- Flashing arrow indicator on dashboard
- Transmission stuck in 3rd gear (limp mode)
How to Fix
Replace transmission solenoids (SL1 part 31256009, SL2 part 31256010) and valve body separator plate as a first step. Perform complete transmission fluid flush with Volvo-approved ATF (JWS 3309). If slipping persists, a transmission rebuild is needed ($3,000-5,000). Rebuilt transmissions from specialists like IPD or Level 10 are available. Preventive maintenance: change transmission fluid every 40,000 miles despite Volvo's 'lifetime fill' recommendation.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Volvo 1161540KT JWS 3309 transmission-service fluid kit
early-transmission fluid service after diagnosis and exact gearbox match Fitment/availability: Confirmed AW55/JWS 3309 XC70 branch only; verify VIN, gearbox code and required quantity Fitment/availability: In stock with Add to Cart and B…
- Genuine Volvo 31256774 JWS 3324/AW-1 fluid, one liter
later-transmission fluid service after the exact fluid branch is confirmed Fitment/availability: Confirmed later Gen2 TF-80SC AW-1/JWS 3324 XC70 branch; verify VIN, chassis split, gearbox and quantity and do not mix with JWS 3309 Fitment…
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The Aisin TF-80SC 6-speed automatic transmission in the S80 develops valve body issues and torque converter shudder, particularly between 60,000-100,000 miles. The valve body solenoids lose calibration, causing harsh shifts and delayed engagement. The torque converter lockup clutch shudders at 30-50 mph under light throttle. The transmission fluid breaks down over time (despite Volvo's 'lifetime fill' claim), accelerating internal wear. This same transmission is used across many Volvo models (S60, V70, XC60, XC70, XC90) and has a well-documented failure pattern.
Common Symptoms
- Shudder at 30-50 mph under light throttle
- Harsh 1-2 and 2-3 upshifts
- Delayed engagement into Drive or Reverse
- Transmission warning light or flashing gear indicator
- Stuck in 3rd gear (limp mode)
- Clunk on deceleration when torque converter unlocks
How to Fix
Perform transmission fluid drain and refill with Volvo-approved JWS 3309 ATF (3x drain-fill-drive cycles for maximum fluid exchange). If shudder persists, replace torque converter ($1,500-2,500 installed). For valve body issues, replace solenoids and separator plate ($800-1,200). In severe cases, complete transmission replacement or rebuild is needed. Preventive maintenance: change transmission fluid every 40,000-50,000 miles. Never use non-approved ATF - it will cause shifting problems.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Aisin ATF-0T4 JWS 3309 automatic-transmission fluid, one quart
matched fluid for a diagnosed serviceable early-transmission branch, not a cure for internal failure Fitment/availability: JWS 3309 branch for an identified early compatible Aisin transmission only; confirm S80 VIN, gearbox code, chassis…
- Genuine Volvo 31256774 JWS 3324/AW-1 fluid, one liter
matched later-generation service fluid after exact transmission identification Fitment/availability: Gen2 TF-80SC and other Volvo Aisin AW-1/JWS 3324 branches; confirm S80 VIN, gearbox, chassis split and quantity and do not mix with JWS …
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
The Aisin Warner 8-speed automatic in the S60 T5 and T6 exhibits delayed engagement when shifting from Park to Drive or Reverse, and hesitation during low-speed maneuvers. Owners report a 1-2 second delay before the car moves after selecting Drive, and jerky behavior in parking lots. The issue is linked to TCM software calibration that prioritizes fuel economy over responsiveness, and torque converter clutch engagement logic. Cold weather amplifies the delay. Volvo has released multiple TCM software updates.
Common Symptoms
- 1-2 second delay when shifting from Park to Drive
- Hesitation when pulling away from stops
- Jerky low-speed behavior in parking lots
- Harsh downshift when requesting sudden acceleration
- Clunk when shifting into Reverse
How to Fix
Visit dealer for latest TCM software update (addresses shift engagement timing). Perform adaptive reset of transmission learning by disconnecting the battery for 30 minutes. Transmission fluid drain and refill with Volvo-approved ATF. If delay persists, valve body inspection and possible replacement may be needed. Use Dynamic drive mode in cold weather for quicker shift response.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Volvo 31256775 four-liter JWS 3324/AW-1 automatic-transmission fluid
correct fluid for a diagnosed serviceable TG-81 transmission branch, followed by proper level, fluid-counter and adaptation procedures Fitment/availability: Applicable 2019 Volvo S60 T5/T6/T8 TG-81SC and other VIN-confirmed JWS 3324/AW-1…
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
P0742 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 P0742 mean on a Volvo?
P0742 stands for "Torque Converter Clutch Circuit Stuck On." P0742 means the torque converter clutch (TCC) circuit is stuck on, meaning the lockup clutch that mechanically links the engine to the transmission stays engaged when it should release. The computer commands the clutch on and off, and when it detects the converter clutch remaining applied, it sets this code. The classic symptom is the engine stalling when coming to a stop, similar to driving a manual without pushing the clutch in, along with possible harsh shifts or poor fuel economy. It points to a hydraulic or solenoid problem inside the transmission rather than the engine. On Volvo it is documented across 3 models: XC70, S80, S60.
What are the most common causes of P0742?
The most common causes of P0742 are: Stuck or failed torque converter clutch solenoid, Stuck valve in the valve body (TCC apply valve), Contaminated or degraded transmission fluid, Internal transmission hydraulic leak holding the clutch on, Wiring or connector fault to the TCC solenoid, Faulty torque converter, Dirty or clogged transmission filter. The specific cause varies by vehicle.
How much does it cost to fix P0742 on a Volvo?
Published repair estimates on Volvo range from $300 to $5,000 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 P0742 on a different make?
View P0742 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.