Fault code P0732 – a step-by-step guide to diagnosing and fixing it

The meaning of error code P0732 – Gear 2 Incorrect ratio

P0732: Causes, signs and repairs

Error code P0732 is displayed and the check engine light is on - what does this mean?

The OBD system detects an error in the second gear of the automatic transmission, whereby an incorrect transmission ratio is detected. This DTC P0732 affects the transmission control unit and occurs when the actual transmission ratio deviates from the expected value.

What can cause this error code?

Defective solenoid valves in the transmission control block
Worn clutches or belts in second gear
Low transmission oil level or contaminated ATF
Clogged transmission oil filter
Damaged wiring to the transmission control unit
Defective transmission control unit (TCM)
Mechanical wear of the planetary gears
Loose or corroded plug connections
Defective speed sensors in the transmission

What symptoms occur in parallel with fault code P0732?

Shifting problems: The transmission does not shift into second gear or jumps out
Jerking when shifting gears: Smooth transitions between gears
Increased engine speed: Engine revs up without corresponding acceleration
Emergency running program: Transmission stops in a safe gear
Overheating: Transmission temperature rises abnormally
Grinding noises: Metallic noises from the transmission area
Delayed acceleration: Vehicle reacts sluggishly to accelerating

How can the problem with fault code P0732 be rectified?

Repairing fault code P0732 requires a systematic approach to identify the exact cause.
Change the transmission oil and filter: Completely change the ATF oil and transmission filter, as contaminated oil is often the cause of shifting problems
Replace solenoid valves in the transmission control block: Replace defective solenoids responsible for shifting second gear
Check wiring and plug connections: Inspect all electrical connections to the transmission control unit for damage and repair them
Replace transmission control unit: If the TCM is defective, replace the entire control unit and have it reprogrammed
Mechanical transmission repair: If the internal components are worn, carry out a general overhaul of the transmission
Replace speed sensors: Replace defective sensors that are sending incorrect signals to the control unit

FAQ - Frequently asked questions about DTC P0732

Can I continue driving with error code P0732?

Short journeys are possible, but you should take the vehicle to a workshop as soon as possible. The transmission may be operating in emergency mode, which can lead to further damage.

How much does it cost to repair error code P0732?

The costs vary depending on the cause: oil change 150-300€, solenoid valves 400-800€, transmission control unit 800-1500€, transmission overhaul 2000-4000€.

How can I delete error code P0732 myself?

You can use an OBD scanner to clear the code temporarily, but it will return if the problem has not been rectified. A professional diagnosis is required.

Is error code P0732 the same for all manufacturers?

Yes, P0732 is a standardized EOBD code that has the same meaning for all vehicle manufacturers. However, manufacturer-specific additional codes may occur.

How long does it take to diagnose error code P0732?

A professional diagnosis takes around 1-2 hours, as various components of the transmission system have to be checked.

Can cold weather trigger fault code P0732?

Yes, at very low temperatures, viscous transmission oil can lead to shifting problems and temporarily trigger the code.

Vehicles in which fault code P0732 occurs most frequently

Error code P0732 is a widespread trouble code in automatic transmissions and can have various causes, but is most common in the following vehicles:

Ford: Focus, Fusion, Escape, Explorer (2005-2015)
General Motors: Chevrolet Malibu, Impala, Buick LaCrosse (2006-2014)
Honda: Accord, Civic, CR-V, Pilot (2003-2012)
Toyota: Camry, Corolla, RAV4, Highlander (2004-2013)
Nissan: Altima, Sentra, Murano, Pathfinder (2005-2016)
Volkswagen: Jetta, Passat, Tiguan (2008-2015)
BMW: 3 Series, 5 Series, X3, X5 (2006-2014)

If the code P0732 occurs in your vehicle, it is important to act quickly to avoid more costly consequential damage. Early diagnosis by a specialist can often prevent expensive transmission repairs. Regular transmission oil changes should be carried out, especially in older vehicles with high mileage, to avoid such problems.

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