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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 624 (DTCS P1D96-00 To U1479-00 - 8HP45/845RE Automatic Transmission - 1500) >> Diagnosis And Testing >> P1DB4-00-Incorrect Gear Ratio During Gear Engagement Or In Gear >> When Monitored

When Monitored

WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

Shifter is in the Drive or Reverse position.

Transmission oil temperature is above a calibrated value.

No clutch slip control functions commanded.

No Input Speed Sensor signal DTCs set.

Input Speed Sensor signal is above a calibrated value.

Output Speed Sensor signal is valid or the output speed can be calculated from the wheel speed CAN signal if the Output Speed Sensor signal is not available.

Engine speed signal via CAN or output speed signal is above a calibrated value.

During Gear Shifts: 

The output speed and the output speed gradient must be higher than a calibrated value.

During Gear Engagements: 

The absolute value of the input speed gradient and pedal position must be lower than their respective calibrated values.