P0705 Code: Transmission Range Sensor Circuit Malfunction (PRNDL Input)
Note: We do not currently have verified model-specific diagnostic data for the Lexus Rc. The symptoms and fixes listed below are the standard generic OBD2 guidelines for the P0705 code. Always consult a factory service manual before replacing parts.
What does this mean?
Code P0705 indicates a problem with the transmission range sensor circuit. This sensor tells the PCM/TCM which gear the driver has selected.
Diagnostic system: Transmission control and shift monitoring
On a Lexus Rc, the P0705 code should be diagnosed as part of the transmission control and shift monitoring group. Related codes and live data from this same system can change the repair priority, so avoid replacing parts from the code name alone.
Most Common Causes for Lexus Rc
- Faulty transmission shift solenoid
- Damaged, chafed, or broken wiring harness
- Corroded or loose electrical connector
- Low, dirty, or burnt transmission fluid
Symptoms to Watch For
- Check Engine Light is illuminated
- Hard or harsh gear shifting
- Transmission stuck in one gear
- Engine cranks but won't start
- Delayed gear engagement
Before replacing parts, check these first
- Check fluid level and condition when the vehicle design allows it.
- Scan transmission module data, not only generic engine codes.
- Look for speed sensor, solenoid, and electrical codes before assuming internal transmission failure.
- Check for blown fuses, weak battery voltage, and damaged connectors before buying major parts.
How to Diagnose
Common Mistakes
Assuming the transmission needs rebuilding before checking fluid, sensors, solenoids, wiring, and control-module codes. Always confirm the fault with freeze-frame data, live data, visual inspection, and circuit checks before spending money on parts.
Frequently Asked Questions
Can I drive with the P0705 code?
If the check engine light is solid, you can usually drive to a safe location or mechanic. If the light is flashing, pull over immediately to prevent catastrophic engine or catalytic converter damage.
Will the P0705 code clear itself?
Once the underlying problem is fixed, the engine computer will run its self-checks. If it passes over several drive cycles, the light will turn off automatically. You can also clear it immediately using an OBD2 scanner.
Will this code fail an emissions test?
Yes. If the Check Engine Light is on due to the P0705 code, your Lexus will automatically fail an OBD2 plug-in emissions or smog test.
What should I check first for P0705?
Check fluid level and condition when the vehicle design allows it. Scan transmission module data, not only generic engine codes. Look for speed sensor, solenoid, and electrical codes before assuming internal transmission failure.
Join the Discussion
Repair Estimate
Fuse, connector, wiring, cleaning, or basic inspection
Internal transmission repair or module programming after electrical checks
Includes parts and labor. May vary by location.
Electrical repairs may be moderate; internal transmission repairs can be expensive and need professional confirmation.
DIY Difficulty
Can usually be performed at home with basic hand tools.