PowertrainP0729
CautionSeverity: Caution - get it checked when you can
Gear 6 Incorrect Ratio
Key terms: SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
This range normally covers the transmission control system, but some manufacturers use P07-P09 codes for unrelated functions (fuel pump control, air-mix motors, lighting or windows). Check the description before assuming it is a transmission fault.
2Common causes
- Low or dirty transmission fluid
- Faulty shift solenoid
- Faulty speed sensor
- Wiring or connector fault
- Internal transmission wear
3Can I drive?
If the transmission slips, jerks, will not shift, or a transmission temperature warning is on, stop driving and let it cool: continuing can cause expensive damage. If the code names a different system (for example the fuel pump), treat it on its own terms; a fuel-pump control failure can stall the car, so have it checked before driving further. Otherwise drive gently to a workshop.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 38
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P0729 | Gear 6 Incorrect Ratio SAE | Powertrain |
| BAIC Motor | P0729 | Gear ratio-6th gear Brand | Powertrain |
| Mercedes-Benz | P0729 | Gear 6 Incorrect Ratio SAE | Powertrain |
| BMW | P0729 | implausible signal or value Brand | Powertrain |
| BYD | P0729 | Gear 6 Incorrect Ratio Brand | Powertrain |
| Chery | P0729 | Gear 6 Incorrect Ratio Brand | Powertrain |
| Chrysler | P0729 | 6th gear Brand | Powertrain |
| Daewoo | P0729 | Gear 6 Incorrect Ratio Brand | Powertrain |
| DFFS | P0729 | 6st gear ratio Brand | Powertrain |
| DFFX | P0729 | 6 Gear ratio failure Brand | Powertrain |
| DFXK | P0729 | Gear 6 Incorrect Ratio Brand | Powertrain |
| EOBD | P0729 | Käik 6 vale suhe Brand | Powertrain |
| Fiat | P0729 | 6th Gear Brand | Powertrain |
| Geely | P0729 | Gear 6 Error Ratio Brand | Powertrain |
| GM | P0729 | Gear 6 Incorrect Ratio Brand | Powertrain |
| Great Wall | P0729 | Gear 6 Incorrect Ratio Brand | Powertrain |
| Hafei | P0729 | Gear 6 Incorrect Ratio Brand | Powertrain |
| Holden | P0729 | Gear 6 Incorrect Ratio SAE | Powertrain |
| Honda | P0729 | Gear 6 Incorrect Ratio SAE | Powertrain |
| Hyundai | P0729 | Gear 6 Incorrect Ratio SAE | Powertrain |
| Isuzu | P0729 | Gear 6 Incorrect Ratio SAE | Powertrain |
| Land Rover | P0729 | Gear 6 Incorrect Ratio SAE | Powertrain |
| Mahindra | P0729 | 6TH GR FNCTN Brand | Powertrain |
| Maserati | P0729 | Gear 6 Shift Incorrect Ratio Brand | Powertrain |
| Mitsubishi | P0729 | Gear 6 incorrect ratio Brand | Powertrain |
| Nissan | P0729 | 6th gear function Brand | Powertrain |
| Opel | P0729 | Gear 6 Incorrect Ratio Brand | Powertrain |
| Peugeot | P0729 | Gear 6 Incorrect Ratio SAE | Powertrain |
| Proton | P0729 | Gear 6 incorrect ratio Brand | Powertrain |
| Renault | P0729 | 6TH GR Fnctn Brand | Powertrain |
| Saab | P0729 | Gear 6 Incorrect Ratio Brand | Powertrain |
| MG (SAIC) | P0729 | Gear 6 Incorrect Ratio Brand | Powertrain |
| Sprinter | P0729 | Gear 6 Incorrect Ratio SAE | Powertrain |
| Subaru | P0729 | Gear 6 Incorrect Ratio SAE | Powertrain |
| Suzuki | P0729 | Gear 6 Incorrect Ratio Brand | Powertrain |
| Tata | P0729 | Gear 6 Incorrect Ratio Brand | Powertrain |
| Toyota | P0729 | 6st gear ratio Brand | Powertrain |
| Volkswagen | P0729 | Gear 6: Incorrect Ratio Brand | Powertrain |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 2
These 7-character codes are manufacturer-specific variants of P0729 and may be reported by some scan tools.
6Related codes
Browse Pxxx codes or P072xx codes.