- What Does the Code Mean?
- How to Diagnose the P0705 Code?
- Common Mistakes When Diagnosing P0705 Code
- What Repairs Will Fix the P0705 Code?
- Codes Related to P0705
What Does P0705 Mean?
The diagnostic trouble code (DTC) P0705 in your vehicle’s computer means that the sensor (Range Switch) that monitors what gear the transmission is in has experienced a fault and set a code in the Engine Control Module (ECM).
The range switch (Park Neutral or PRNDL Switch) sends a signal to the ECM to tell it what gear the transmission is in. When the vehicle is put into a gear (P,R,D etc) it completes a circuit. Each individual circuit carries varying voltages that the ECM interprets.
If the ECM sees a signal that is not logical or out of range, it will set the DTC P0705.
Symptoms of P0705
- Check Engine Light
- No start (park or neutral)
- No dash indicator (PRNDL)
- Erratic shifting
- No Reverse lights
- Having to wiggle shift lever start
- Having to put vehicle in neutral (N) to start
Causes of P0705 Code
The most common cause would be from a defective range switch that has an open or short within the component. In this case, the range sensor is getting the right input from the driver but cannot relay the message properly to the ECM. If the sensor is out of adjustment, it may be able to send a signal but it will send the wrong message to the ECM and trigger the code P0705.
Sometimes the range switch can get moved slightly causing a misalignment of the switch. The code could also come from a problem with the ECM or TCM however this would usually produce other codes that would help in diagnosing the problem.
If the transmission fluid is low or contaminated it might produce problems within the valve body responsible for shifting gears and give the P0705 code. Other causes include:
- A defective or faulty range switch
- A switch that is out of adjustment
- A faulty TCM or ECM
- Poor transmission fluid
- Problem within valve body
How to Diagnose the P0705 Code?
It’s always a good practice to start any transmission diagnostic by checking the fluid level and condition of the transmission.
Assuming all is right with the fluid, you can then inspect the electrical connection on the TRS by checking for proper power/ground specs. If the switch is mounted externally it is susceptible to road debris and moisture and may have a bad connection.
If you believe that the connection is good you can start checking for power/ground/volt reference. You will need to get a wiring schematic to ensure you check the proper wires and that your readings are correct. Someone may have to sit in the car and shift gears so you can check all inputs and outputs.
Depending on the style, the range switch (contact, variable resistor, pressure) can be tested if you have the proper tool, namely, a digital multi meter. A multi meter can easily test voltage changes or resistance in circuit and an auto ranging multimeter will be your best option for diagnosing. If all sensors test good you will have to check the circuit for opens or shorts if the code does not specify a short to power or ground.
Common Mistakes When Diagnosing P0705 Code
As with any transmission diagnostic, mechanical or electrical, the first step should always be to check the fluid level and condition. All vehicle have a slightly different method for checking transmission fluid level so you have to be sure all conditions are met before taking a measurement.
Low or contaminated transmission fluid can lead to several troubling problems. Also make sure the switch is properly aligned before deciding to replace it and, conversely, make sure it is properly aligned after installation.
What Repairs Will Fix the P0705 Code?
Changing a defective switch will fix that problem but proper alignment will have to be set before repairs are complete so begin by learning the adjustment procedure.
The wiring harness will have to be thoroughly checked if a broken wire is suspected.
If low fluid or contamination is present a proper flush may fix the problem if there hasn’t already been excessive damage.
A closed circuit, preferably heated flush machine should be used to make sure all dirty fluid is evacuated otherwise debris may stay in the system and the problem could return. If you found the switch was only out of adjustment, look for any signs of damage that might have caused it to move or when reassembling check for proper torque specs (if any) when re-mounting.
Codes Related to P0705
Related Transmission Range Sensor codes: P0706, P0707, P0708, and P0709.
It would not be uncommon for this to be the only code you find but it may also be associated with something more severe.
Links To Diagnostic Codes
|P0218||Transmission Over Temperature Condition|
|P0700||Transmission Control System (MIL Request)|
|P0701||Transmission Control System Range/Performance|
|P0702||Transmission Control System Electrical|
|P0703||Torque Converter/Brake Switch B Circuit|
|P0704||Clutch Switch In put Circuit Malfunction|
|P0705||Transmission Range Sensor Circuit Malfunction (PRNDL Input)|
|P0706||Transmission Range Sensor Circuit Range/Performance|
|P0707||Transmission Range Sensor Circuit Low Input|
|P0708||Transmission Range Sensor Circuit High Input|
|P0709||Transmission Range Sensor Circuit intermittent|
|P0710||Transmission Fluid Temperature Sensor Circuit|
|P0711||Transmission Fluid Temperature Sensor Circuit Range/Performance|
|P0712||Transmission Fluid Temperature Sensor Circuit Low Input|
|P0713||Transmission Fluid Temperature Sensor Circuit High Input|
|P0714||Transmission Fluid Temperature Sensor Circuit Intermittent P0715|
|P0715||Input/Turbine Speed Sensor Circuit|
|P0716||Input/Turbine Speed Sensor Circuit Range/Performance|
|P0717||Input/Turbine Speed Sensor Circuit No Signal|
|P0718||Input/Turbine Speed Sensor Circuit Intermittent|
|P0719||Torque Converter/Brake Switch B Circuit Low|
|P0720||Output Speed Sensor Circuit|
|P0721||Output Speed Sensor Circuit Range/Performance|
|P0722||Output Speed Sensor Circuit No Signal|
|P0723||Output Speed Sensor Circuit Intermittent|
|P0724||Torque Converter/Brake Switch B Circuit High|
|P0725||Engine Speed Input Circuit|
|P0726||Engine Speed Input Circuit Range/Performance|
|P0727||Engine Speed Input Circuit No Signal|
|P0728||Engine Speed Input Circuit Intermittent|
|P0729||Gear 6 Incorrect Ratio|
|P0730||Incorrect Gear Ratio|
|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|
|P0738||TCM Engine Speed Output Circuit|
|P0739||TCM Engine Speed Output Circuit Low|
|P0740||Torque Converter Clutch Circuit Malfunction|
|P0741||Torque Converter Clutch Circuit|
|P0742||Torque Converter Clutch Circuit Stuck On|
|P0743||Torque Converter Clutch Circuit Electrical|
|P0744||Torque Converter Clutch Circuit Intermittent|
|P0745||Pressure Control Solenoid 'A'|
|P0746||Pressure Control Solenoid 'A' Performance or Stuck Off|
|P0747||Pressure Control Solenoid 'A' Stuck On|
|P0748||Pressure Control Solenoid 'A' Electrical|
|P0749||Pressure Control Solenoid 'A' Intermittent|
|P0750||Shift Solenoid 'A'|
|P0751||Shift Solenoid 'A' Performance or Stuck Off|
|P0752||Shift Solenoid 'A' Stuck On|
|P0753||Shift Solenoid 'A' Electrical|
|P0754||Shift Solenoid 'A' Intermittent|
|P0755||Shift Solenoid 'B'|
|P0756||Shift Solenoid 'B' Performance or Stuck Off|
|P0757||Shift Solenoid 'B' Stuck On|
|P0758||Shift Solenoid 'B' Electrical|
|P0759||Shift Solenoid 'B' Intermittent|
|P0760||Shift Solenoid 'C'|
|P0761||Shift Solenoid 'C' Performance or Stuck Off|
|P0762||Shift Solenoid 'C' Stuck On|
|P0763||Shift Solenoid 'C' Electrical|
|P0764||Shift Solenoid 'C' Intermittent|
|P0765||Shift Solenoid 'D'|
|P0766||Shift Solenoid 'D' Performance or Stuck Off|
|P0767||Shift Solenoid 'D' Stuck On|
|P0768||Shift Solenoid 'D' Electrical|
|P0769||Shift Solenoid 'D' Intermittent|
|P0770||Shift Solenoid 'E'|
|P0771||Shift Solenoid 'E' Performance or Stuck Off|
|P0772||Shift Solenoid 'E' Stuck On|
|P0773||Shift Solenoid 'E' Electrical|
|P0774||Shift Solenoid 'E' Intermittent|
|P0775||Pressure Control Solenoid 'B'|
|P0776||Pressure Control Solenoid 'B' Performance or Stuck Off|
|P0777||Pressure Control Solenoid 'B' Stuck On|
|P0778||Pressure Control Solenoid 'B' Electrical|
|P0779||Pressure Control Solenoid 'B' Intermittent|
|P0786||Shift/Timing Solenoid Range/Performance|
|P0787||Shift/Timing Solenoid Low|
|P0788||Shift/Timing Solenoid High|
|P0789||Shift/Timing Solenoid Intermittent|
|P0790||Normal/Performance Switch Circuit|
|P0791||Intermediate Shaft Speed Sensor Circuit|
|P0792||Intermediate Shaft Speed Sensor Circuit Range/Performance|
|P0793||Intermediate Shaft Speed Sensor Circuit No Signal|
|P0794||Intermediate Shaft Speed Sensor Circuit Intermittent|
|P0795||Pressure Control Solenoid 'C'|
|P0796||Pressure Control Solenoid 'C' Performance or Stuck off|
|P0797||Pressure Control Solenoid 'C' Stuck On|
|P0798||Pressure Control Solenoid 'C' Electrical|
|P0799||Pressure Control Solenoid 'C' Intermittent|
Links To Symptoms
|Low Transmission Fluid|
|Burnt Transmission Fluid|
|DTC / Check Engine Codes|
|Lack of Responses|
|Torque Converter Problems|
|Whining, Clunking or Humming|
|Transmission Fluid Leak|
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