P0755 on Volvo
Shift Solenoid B Malfunction
P0755 on Volvo vehicles indicates shift solenoid b malfunction. Au7o has documented this code across 3 Volvo models — most commonly on C70, S70, V70. This code means the transmission control module commanded shift solenoid 'B' but did not see the expected electrical response, indicating an electrical fault in that solenoid or its circuit. Shift solenoids are small electrically-operated valves inside the automatic transmission that route pressurized fluid to engage the correct gears at the right time. When the computer detects an open, short, or out-of-range signal on solenoid B's circuit, it flags this code. You may notice harsh or wrong-gear shifts, the transmission stuck in one gear, or 'limp' mode. Typical repair costs on Volvo range from $400 to $3,500, depending on the specific model and root cause.
Common Causes of P0755
- •Failed or stuck shift solenoid B
- •Damaged, shorted, or corroded solenoid wiring/connector
- •Low or dirty/contaminated transmission fluid
- •Clogged transmission filter or fluid passages
- •Valve body wear or internal hydraulic fault
- •Faulty transmission control module (TCM)
- •Internal transmission mechanical wear
P0755 on Volvo by Model
Volvo C70(1 issue)
- Automatic Transmission Solenoid Failure2006-2013
The Aisin-Warner automatic transmission develops harsh shifting and delayed engagement due to worn solenoids in the valve body. The transmission fluid change interval is often exceeded, accelerating wear.
Volvo S70(1 issue)
- AW50-42 Automatic Transmission Failure1998-2000
Like the 850, the S70 shares the Aisin-Warner AW50-42 automatic transmission that develops internal failures. The valve body, solenoids, and torque converter are common failure points, especially in turbocharged models.
Volvo V70(1 issue)
- AW55-50/AW55-51 Automatic Transmission Solenoid Failure1998-2007
The Aisin-Warner AW55-50 and AW55-51 automatic transmissions used in V70 models are known for solenoid failures, particularly the SL1 and SL2 linear solenoids that control shift pressure. Failed solenoids cause harsh or delayed shifts, transmission slipping, and limp mode engagement. The solenoids deteriorate due to ATF contamination and heat, especially when fluid changes are neglected.
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View P0755 across all makes →Frequently Asked Questions
What does P0755 mean on Volvo?▼
P0755 stands for "Shift Solenoid B Malfunction." This code means the transmission control module commanded shift solenoid 'B' but did not see the expected electrical response, indicating an electrical fault in that solenoid or its circuit. Shift solenoids are small electrically-operated valves inside the automatic transmission that route pressurized fluid to engage the correct gears at the right time. When the computer detects an open, short, or out-of-range signal on solenoid B's circuit, it flags this code. You may notice harsh or wrong-gear shifts, the transmission stuck in one gear, or 'limp' mode. On Volvo specifically, this code is documented across 3 models.
What causes P0755 on Volvo vehicles?▼
Common causes on Volvo: Failed or stuck shift solenoid B, Damaged, shorted, or corroded solenoid wiring/connector, Low or dirty/contaminated transmission fluid, Clogged transmission filter or fluid passages, Valve body wear or internal hydraulic fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0755 on a Volvo?▼
Repair costs on Volvo range from $400 to $3,500, depending on the specific model and root cause.
Which Volvo models have P0755 documented?▼
Au7o has documented P0755 on 3 Volvo models: C70, S70, V70.