Fault code lookup

PowertrainP0730

Caution

Severity: Caution - get it checked when you can

Incorrect Gear Ratio

42 brands affected · Generic SAE J2012 description.

Key terms: SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

The transmission is not achieving the gear ratio the computer expects, which usually means it is slipping internally.

2Common causes

  1. Low or dirty transmission fluid
  2. Worn clutch packs or brake bands
  3. Faulty shift solenoid
  4. Valve body fault
  5. Faulty speed sensor

3Can I drive?

Caution · drive with care

If the transmission slips or flares between gears, stop driving and have it checked: continued slipping can destroy the transmission. If it feels normal, 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 42

BrandCodeDescriptionSystem
Ashok Leyland CVP0730Incorrect Gear Ratio SAEPowertrain
BAIC MotorP0730Ratio control fault BrandPowertrain
Mercedes-BenzP0730Incorrect Gear Ratio SAEPowertrain
BMWP0730EGS: Gear monitoring BrandPowertrain
BYDP0730Ratio control fault BrandPowertrain
CheryP0730Cylinder trackslip BrandPowertrain
ChryslerP0730Gear improper BrandPowertrain
DaewooP0730Incorrect Gear Ratio BrandPowertrain
DaihatsuP0730Gear ratio fault BrandPowertrain
DFFSP0730Gear ratio error BrandPowertrain
DFFXP0730Incorrect Gear Ratio BrandPowertrain
DFXKP0730Incorrect Gear Ratio BrandPowertrain
EOBDP0730Feil girforhold BrandPowertrain
FiatP0730Incorrect gear ratio BrandPowertrain
FordP0730Coast Clutch System Failed On BrandPowertrain
GeelyP0730Incorrect Gear Ratio BrandPowertrain
GMP0730Incorrect Gear Ratio BrandPowertrain
Great WallP0730Ratio control fault BrandPowertrain
HafeiP0730Incorrect Gear Ratio BrandPowertrain
HoldenP0730Gear Ratio Incorrect BrandPowertrain
HondaP0730Incorrect Gear Ratio SAEPowertrain
HyundaiP0730Incorrect Gear Ratio SAEPowertrain
IsuzuP0730Incorrect Gear Ratio SAEPowertrain
Land RoverP0730Incorrect Gear Ratio SAEPowertrain
MaseratiP0730Incorrect Gear Ratio BrandPowertrain
MazdaP0730Coast Clutch System Failed On BrandPowertrain
MitsubishiP0730Incorrect Gear Ratio BrandPowertrain
NissanP0730Incorrect Gear Ratio SAEPowertrain
OpelP0730Incorrect Gear Ratio BrandPowertrain
PeroduaP0730Gear ratio fault BrandPowertrain
PeugeotP0730Incorrect Gear Ratio SAEPowertrain
PorscheP0730Incorrect Gear Ratio SAEPowertrain
ProtonP0730Incorrect Gear Ratio BrandPowertrain
SaabP0730Incorrect Gear Ratio BrandPowertrain
MG (SAIC)P0730Incorrect Gear Ratio BrandPowertrain
SmartP0730Incorrect Gear Ratio SAEPowertrain
SprinterP0730Incorrect Gear Ratio SAEPowertrain
SubaruP0730Improved diagnosis of BrandPowertrain
SuzukiP0730Turbine Revolution Sensor Signal, A/T VSS Signal Circuit or Automatic Transmission Itself Malfunction BrandPowertrain
TataP0730Incorrect Gear Ratio BrandPowertrain
ToyotaP07301st gear transmission ratio when the engine brake stuck in 4th gear BrandPowertrain
VolkswagenP0730Gear Ratio Monitoring: Incorrect Gear Ratio BrandPowertrain

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 6

These 7-character codes are manufacturer-specific variants of P0730 and may be reported by some scan tools.

BrandCodeDescriptionSystem
Mercedes-BenzP073000Es liegt eine unzulässige Getriebebersetzung vor. BrandPowertrain
SprinterP073000Es liegt eine unzulässige Getriebeübersetzung vor. BrandPowertrain
SsangYongP073000Gear ratio - 1st gear with engine brake stuck 4th BrandPowertrain
VolvoP073000If the transmission control module (TCM) registers that reverse or forward drive is not engaged when the gear selector is moved to position R or D, diagnostic trouble code (DTC) TCM-P170164 or TCM- depending on the cause of the fault BrandPowertrain
Mercedes-BenzP073002Es liegt eine unzulässige Getriebebersetzung vor. Es liegt ein allgemeiner Signalfehler vor. BrandPowertrain
Mercedes-BenzP073064Es liegt eine unzulässige Getriebebersetzung vor.Es liegt ein unplausibles Signal vor. BrandPowertrain

6Related codes

  • P0731 Gear 1 Incorrect Ratio
  • P0732 Gear 2 Incorrect Ratio
  • P0733 Gear 3 Incorrect Ratio
  • P0734 Gear 4 Incorrect Ratio
  • P0735 Gear 5 Incorrect Ratio
  • P0736 Reverse Incorrect Ratio
  • P0737 TCM Engine Speed Output Circuit
  • P0738 TCM Engine Speed Output Circuit Low
  • P0739 TCM Engine Speed Output Circuit High
  • P073A Right rear blower motor failure
  • P073B Rear or left rear air supply motor failure
  • P073C Stuck in gear 7

Browse Pxxx codes or P073xx codes.

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