What Does P1705 Mean?
The transmission control system has detected an indeterminate failure and defaulted the transmission to neutral as a protective measure. This is essentially the same condition as P1700 and indicates a serious transmission system fault.
Safety Warning
Transmission may suddenly shift to neutral while driving or fail to engage any gear. Do not drive; tow to repair facility to prevent further damage or accident.
Common Causes
35%
Internal transmission mechanical failure (clutches, bands, valve body)
25%
Severely low transmission fluid or complete fluid loss
20%
Failed transmission control module unable to determine state
15%
Multiple sensor failures (speed sensors, pressure sensors)
5%
Catastrophic electrical failure in transmission harness
Diagnostic Steps
1
Step 1: Immediately check transmission fluid level; inspect for leaks underneath vehicle
2
Step 2: Retrieve all additional DTCs stored in TCM for clues to specific failure mode
3
Step 3: Monitor transmission data PIDs including line pressure, gear commanded vs actual, and solenoid states
4
Step 4: Perform line pressure testing at various gear positions to assess hydraulic system integrity
5
Step 5: If fluid and pressure are adequate, internal transmission inspection or TCM replacement required
Estimated Repair Cost
$200 - $5,000
Parts + labor, varies by vehicle and location
The transmission control system has detected an indeterminate failure and defaulted the transmission to neutral as a protective measure. This is essentially the same condition as P1700 and indicates a serious transmission system fault.
The most common cause of P1705 (Transmission Indeterminate Failure (Failed to Neutral)) is: Internal transmission mechanical failure (clutches, bands, valve body)
Typical repair costs for P1705 range from $200 to $5,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Transmission may suddenly shift to neutral while driving or fail to engage any gear. Do not drive; tow to repair facility to prevent further damage or accident.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1705 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Manufacturer
Recommended Tools
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