In this blog, we’ll explore the causes, symptoms, and fixes for the P0705 code, and explain how the iCarsoft CR MAX Vehicle Diagnostic Tool from www.icarsoft-us.com can help you diagnose and resolve this issue effectively.

1. What Does P0705 Mean?

The P0705 code is a diagnostic trouble code (DTC) indicating "Transmission Range Sensor Circuit Malfunction (Bank 2)." This means there’s an issue with the transmission range sensor (TRS), also known as the neutral safety switch or gear position sensor, which informs the Engine Control Unit (ECU) or Transmission Control Module (TCM) about the gear position. A malfunction in the circuit—such as an incorrect signal or no signal—triggers P0705, potentially affecting shifting or starting the vehicle.

2. Causes Behind P0705

Faulty Transmission Range Sensor
A defective TRS may fail to send accurate gear position data due to wear, damage, or internal failure.

Wiring or Connector Issues
Damaged, shorted, or corroded wiring or connectors in the TRS circuit can disrupt signal transmission.

Misadjusted Sensor
Improper alignment or installation of the TRS can lead to incorrect readings.

TCM or ECU Malfunction
In rare cases, a fault in the TCM or ECU may misinterpret the TRS signals.

3. Reasons for P0705 Occurrence

Sensor Wear
High mileage or exposure to transmission fluid can degrade the TRS over time, causing circuit issues.

Physical Damage
Accidents or rough handling during repairs can damage the sensor or its wiring.

Fluid Contamination
Contaminated or low transmission fluid can affect sensor performance and lead to malfunctions.

4. Vehicles Prone to P0705

The P0705 code can affect any OBD-II vehicle with an automatic transmission, including brands like Chevrolet, Ford, Toyota, Honda, and Nissan. European models such as BMW, Audi, and Volkswagen are also susceptible, especially those with electronic shift systems or high mileage.

5. Severity of P0705

The P0705 code is of moderate to high severity. It can prevent the vehicle from starting, cause erratic shifting, or lead to the transmission being stuck in a single gear, posing safety risks if not addressed promptly.

6. Driving with P0705 Active

Driving with P0705 is not recommended. The issue can result in unsafe shifting behavior, failure to start, or transmission damage. It’s best to address the problem as soon as possible to avoid further complications.

7. DIY Solutions for P0705

Sensor Replacement
Replace the faulty TRS with a compatible unit, following your vehicle’s repair manual.

Wiring Repair
Inspect and fix any damaged, shorted, or corroded wiring and connectors in the sensor circuit.

Sensor Adjustment
Realign or recalibrate the TRS according to manufacturer specifications.

8. How to Diagnose P0705

Scan Tool
Use the iCarsoft CR MAX to read the P0705 code and monitor live data from the TRS to check for signal irregularities.

Multimeter Testing
Measure the sensor’s voltage and resistance, comparing them to manufacturer specifications.

Visual Inspection
Check the sensor, wiring, and connectors for damage or misalignment.

9. Cost of Fixing P0705

Repair costs vary. A TRS replacement costs $50-$200, with labor adding $50-$150 (1-2 hours at $75/hour), totaling $100-$350. Wiring repairs range from $50-$200, while transmission fluid changes or adjustments may cost $50-$150.

10. Clearing P0705 from Your System

Using a Scan Tool
Connect the iCarsoft CR MAX to clear the code and verify the repair.

Battery Disconnection
Disconnect the battery for 5-10 minutes to reset the TCM/ECU, though this may not address the root cause.

11. Preventing P0705 Recurrence

Regular Maintenance
Inspect the transmission system and fluid levels during routine service to catch issues early.

Quality Parts
Use high-quality TRS units to ensure reliable performance.

Proper Installation
Ensure the sensor is correctly aligned and wired during installation or repairs.

12. Notes on P0705

Related Codes
P0705 may appear with P0706 (TRS circuit range/performance) or P0707 (TRS circuit low input). Diagnose together.

Transmission Impact
Since P0705 affects gear selection, it directly influences transmission operation and vehicle safety.

13. Diagnostic Tools for P0705

The iCarsoft CR MAX from www.icarsoft-us.com is perfect for tackling P0705. It reads the code, provides live sensor data, and helps identify circuit or alignment issues. After repairs, it clears the code and confirms the fix.

Want to resolve P0705 quickly? The iCarsoft CR MAX simplifies diagnostics and ensures smooth transmission performance.