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Autopart Mechanic

Autopa ... 4/9/2018

2012 BMW X1 xDrive28i 6 Cyl 3.00L


How do I fix the P0733 OBD-II Trouble Code? How can I diagnose Gear 3 Incorrect Ratio of my car?

1 Answer

PartsAvatar Ca

PartsAvatar Ca 4/9/2018

What the P0733 code means?

The P0733 code means that the power train control module (PCM) has detected something unusual with
the ratio of the third gear in the vehicle's transmission. This will usually have to happen multiple times
before a trouble code will be stored.

What are the causes of the P0733 code?

1. Defective 3rd gear shift solenoid

2. Defective 3rd gear related gear set or clutch pack

3. Defective Engine Coolant Temperature Sensor

4. Defective Valve Body

5. Dirty transmission fluid that restricts the hydraulic passages

What are the symptoms of the P0733 code?

1. Check Engine Light illuminated (Malfunction indicator lamp)

2. Delayed shift or not shifting into 3rd gear

3. Transmission slipping

4. Loss of fuel economy

How serious is the P0733 code?

The P0733 code is very serious. This code can cause a number of drivability issues and is very likely to
leave the driver stranded on the side of the road somewhere. It is best to have this code diagnosed and
repaired as soon as possible to avoid further damage to the vehicle and to prevent being stranded
anywhere. Common mistakes when diagnosing the P0733 code?

Common mistakes when diagnosing the P0733 code?

Technicians report that more frequently than not, internal transmission failures cause this code, and shift
solenoid malfunctions are diagnosed and solenoids are replaced in error.

What repairs can fix the P0733 code?

Replacing a shift solenoid

Replacing the power train control module

Replacing the transmission module (if applicable)

Adding or replacing the transmission fluid and filter

Overhauling the current transmission


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