P0735 Code: Incorrect 5th Gear Ratio
CodePage.genericDisclaimer
Qu'est-ce que cela signifie ?
Code P0735 indicates the actual gear ratio does not match the expected ratio for 5th gear.
Diagnostic system: Transmission control and shift monitoring
On a Bmw M5, the P0735 code should be diagnosed as part of the transmission control and shift monitoring group. Related codes and live data from this same system can change the repair priority, so avoid replacing parts from the code name alone.
Most Common Causes for Bmw M5
- Liquide de transmission bas, sale ou brûlé
- Électrovanne de changement de vitesse défectueuse
- Corps de valve de la transmission usé ou défectueux
- Convertisseur de couple ou embrayage de verrouillage défectueux
- Filtre de transmission obstrué
Symptômes à surveiller
- Le voyant moteur est allumé
- La transmission glisse entre les vitesses
- Changement de vitesse brutal
- La transmission reste bloquée sur un rapport
- La transmission hésite entre les rapports
CodePage.beforeReplacing
- Check fluid level and condition when the vehicle design allows it.
- Scan transmission module data, not only generic engine codes.
- Look for speed sensor, solenoid, and electrical codes before assuming internal transmission failure.
- Check for blown fuses, weak battery voltage, and damaged connectors before buying major parts.
Comment Diagnostiquer
CodePage.commonMistakes
Assuming the transmission needs rebuilding before checking fluid, sensors, solenoids, wiring, and control-module codes. Always confirm the fault with freeze-frame data, live data, visual inspection, and circuit checks before spending money on parts.
CodePage.faq
Can I drive with the P0735 code?
If the check engine light is solid, you can usually drive to a safe location or mechanic. If the light is flashing, pull over immediately to prevent catastrophic engine or catalytic converter damage.
Will the P0735 code clear itself?
Once the underlying problem is fixed, the engine computer will run its self-checks. If it passes over several drive cycles, the light will turn off automatically. You can also clear it immediately using an OBD2 scanner.
Will this code fail an emissions test?
Yes. If the Check Engine Light is on due to the P0735 code, your Bmw will automatically fail an OBD2 plug-in emissions or smog test.
What should I check first for P0735?
Check fluid level and condition when the vehicle design allows it. Scan transmission module data, not only generic engine codes. Look for speed sensor, solenoid, and electrical codes before assuming internal transmission failure.
Join the Discussion
Estimation de réparation
Fuse, connector, wiring, cleaning, or basic inspection
Internal transmission repair or module programming after electrical checks
Comprend les pièces et la main-d'œuvre. Peut varier selon l'emplacement.
Electrical repairs may be moderate; internal transmission repairs can be expensive and need professional confirmation.
Difficulté de réparation (DIY)
Can usually be performed at home with basic hand tools.