What do you need to know about incorrect gear ratio codes?
Incorrect ratio codes typically require an advanced mechanical ability and diagnostic tools. Note: This code is similar to P0729, P0731, P0732, P0733, P0734, P0735 and P0736. If there are other transmission codes, repair those problems first before proceeding with an incorrect gear ratio code. Symptoms of a P0730 trouble code may include:
What does incorrect gear ratio code p0730 mean?
Mercedes Benz (ML 450) P0730 Incorrect Gear Ratio code P0730 Code…. This code refers to Incorrect Gear Ratio. Besides changing the Transmission Fluid, if it’s the Transmission Sensor, what is the cost for that type of repair?
Why is the error in gear 6 incorrect?
In the code itself, it state the error is in 1st. They are referring to the 1st gear of the transmission. Often times, there are speed sensors at the input and output of the transmission. The ECM uses these sensors, to compare speeds and insure accurate gear ratio is present in 1st gear.
Why do newer cars have four gear ratios?
Newer vehicles may have more than four gear ratios to improve fuel economy. The computer determines when to shift up or down between gears based on throttle position vs. vehicle speed.
What does incorrect gear ratio mean?
Error Code P0730 is described as Incorrect Gear Ratio. This means the automatic transmission is experiencing a problem, which is usually caused by dirty transmission fluid or problems with shift solenoids.
How does gear ratio affect performance?
Gear ratios can be boiled down to a single statement: Higher ratios (with a lower numerical value) give better torque/acceleration and lower ratios allow for higher top speeds and better fuel economy. Higher ratios mean the engine has to run faster to achieve a given speed.
What is an incorrect gear ratio?
Incorrect Gear Ratio. This diagnostic trouble code (DTC) is a generic OBD-II powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may vary depending on the model.
How to know if a gear ratio is a gear reduction?
The gear set in the top illustration indicates gear reduction. The drive gear turns twice for every one revolution of the driven gear. Its gear ratio is 2:1 and increases torque. Gear reduction is used for 1st through 4th gears in the transmission in the chart below.