P0705 – Transmission range (TR) sensor/switch, PRNDL input circuit malfunction
| Code | Fault Location | Probable Cause |
|---|---|---|
| P0705 | Transmission range (TR) sensor/switch, PRNDL input circuit malfunction (Buy Part On Amazon) | Wiring, TR sensor/switch, ECM/PCM!TCM |
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Table of Contents
- What Does Code P0705 Mean?
- What are the common causes of code P0705 ?
- What are the symptoms of code P0705 ?
- Codes Related to P0705
- Get Help with P0705
What Does Code P0705 Mean?
Transmissions/transaxles can use combination Park Neutral Position (PNP) and Back-up switch. This switch incorporates a range selector switch (Figure 1). There are 4 inputs (PRND A, B, C, P), which can be switched to ground by the PNP switches. The four switches have a unique switch pattern. The control module (PCM or TCM0 uses the combination of the switch patterns in order to determine the gear selected by the driver and send that information to the control module.
The transmission range (TR) switch, also called the manual lever position (MLP) sensor, is used as an input to the control module that which indicates the drive range requested by the driver. The range switch is usually located on the outside of the case on the transmission/transaxle housing and attached to the shifter. As the gear range selector is moved, the TR switch can make switch connections for each gear range. These inputs allow the control module to determine which gear range has been selected. The TR switch is used to
- Keep engine from starting in any gear position except park or neutral
- Allows a progressive shift sequence in drive
- Limit upshifts in manual ranges
- Operate the backup lights in reverse.
NOTE: Whenever diagnosing a 700 series DTC (Diagnostic Trouble Code) with a transmission, transfer case or other driveline components, check for diagnostic trouble codes (DTCs) under chassis and body systems, not just under “P” or powertrain/engine or emission control type codes. Module communications DTCs are “U” codes. These are most often found when looking for DTCs under chassis or body systems. Chassis related codes are labeled “C” and body system related codes are labeled “B” codes and these can cause drivetrain issues if they affect a sensor that is also used by the heating and air conditioning system.
Figure 1 Trans Range Switch Wiring Diagram
The DTC (Diagnostic Trouble Code) monitors the 4 inputs in order to determine what gear position the transmission is in. When the control module detects that an illegal range has occurred, this DTC sets.
What are the common causes of code P0705 ?
Faulty PNP (Park/Neutral Position) Switch
Misadjusted PNP (Park/Neutral Position) Switch
PNP (Park/Neutral Position) Switch harness is open or shorted
PNP (Park/Neutral Position) circuit poor electrical connection
What are the symptoms of code P0705 ?
- MIL (Malfunction Indicator Lamp [Check Engine & Service Engine Soon])lights on
Codes Related to P0705
None
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My 2004 Mitsubishi montero ls is reading p0705 and the dash lights do not signify the D position. There is no noticeable change in shift patterns. Fuel consumption seems slightly higher since the service engine light came on. Any advice ?
My 2010 Toyota Tundra SR5 5.7L has this code. 4LO flashing, traction control light on and check engine light on. Also, AC is flashing. Transmission is intermittent, sometimes won’t shift past 4th.
Anyone run into this and solved it?
Hello Collin. I haven’t had to fix this issue personally, but I was a toyota mechanic for a while. This issue has a technical service bulletin. Every time I’ve had to diagnose a transmission code, where it has gone into limp mode, it has always had to do with a connector, or it not being seated all the way. Which explains what this tsb is about. water has been known to leak from the cowling down through the firewall, into the kick panel and corrode your left i/p block. The fix for this is to replace your main harness and left i/p junction block. Good luck on your quest.
Hi, my mercedes clk 2.7 2004 years same problem.where is this sensor.i can’t finde it.where it standin???
Suzuki serio 2007 2.3Lts code P0705 chart