P0733 on Volvo
Gear 4 Incorrect Ratio
P0733 on Volvo vehicles indicates gear 4 incorrect ratio. Au7o has documented this code across 1 Volvo model — most commonly on S60. This code indicates the transmission control module found that the actual gear ratio in 4th gear is outside the acceptable range for that gear. It is detected by comparing transmission input speed against output speed while 4th gear is engaged. A mismatch typically signals the transmission is slipping in 4th gear or that a control/hydraulic fault is preventing proper engagement. Typical repair costs on Volvo range from $900 to $4,500, depending on the specific model and root cause.
Common Causes of P0733
- •Low or contaminated transmission fluid
- •Worn 4th-gear clutch packs or bands
- •Failing shift solenoid for 4th gear
- •Valve body or line pressure issues
- •Internal transmission mechanical wear
- •Restricted transmission filter
- •Faulty input or output speed sensor
P0733 on Volvo by Model
Volvo S60(1 issue)
- AW55-50SN 5-Speed Automatic Transmission and TCM Failure2001-2009
P2-generation S60s use the Aisin-Warner AW55-50SN 5-speed automatic. Two related failures dominate owner reports: the transmission control module (TCM), which is mounted inside the transmission case and bathed in hot ATF, develops cracked solder joints and internal failures, and the transmission's clutch packs and valve body wear prematurely because Volvo originally specified the fluid as 'lifetime fill'. Symptoms usually begin as harsh or delayed 1-2 and 2-3 shifts, then progress to flare-ups, limp-home mode (locked in 3rd gear), and eventually loss of forward or reverse. Owners on CarComplaints report 'Transmission/TCU Failure' and 'Lost Forward And Reverse' on early cars, and NHTSA has 16+ automatic-transmission complaints on the 2001 alone.
Looking for P0733 on a different make?
View P0733 across all makes →Frequently Asked Questions
What does P0733 mean on Volvo?▼
P0733 stands for "Gear 4 Incorrect Ratio." This code indicates the transmission control module found that the actual gear ratio in 4th gear is outside the acceptable range for that gear. It is detected by comparing transmission input speed against output speed while 4th gear is engaged. A mismatch typically signals the transmission is slipping in 4th gear or that a control/hydraulic fault is preventing proper engagement. On Volvo specifically, this code is documented across 1 model.
What causes P0733 on Volvo vehicles?▼
Common causes on Volvo: Low or contaminated transmission fluid, Worn 4th-gear clutch packs or bands, Failing shift solenoid for 4th gear, Valve body or line pressure issues, Internal transmission mechanical wear. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0733 on a Volvo?▼
Repair costs on Volvo range from $900 to $4,500, depending on the specific model and root cause.
Which Volvo models have P0733 documented?▼
Au7o has documented P0733 on 1 Volvo model: S60.