P0705 Code: Meaning, Symptoms, Causes & Fix

Overview

Symptoms

• gear hunting
• transmission warning message
• harsh or delayed shifting

Common causes

• Disconnected or loose connector affecting transmission range sensor circuit malfunction (prndl input)
• Broken terminal inside harness
• Connector pin damage/corrosion or harness stress near related components

How to diagnose P0705

1. Confirm P0705 and capture freeze-frame data with a professional scan tool.
2. Inspect wiring, connectors, and grounds related to transmission range sensor circuit malfunction (prndl input) for obvious defects.
3. Use a continuity test from module pin to component to identify opens/high resistance.
4. Check for related DTCs to identify the root-cause chain before replacing parts.
5. After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code P0705

Moderate: This code is moderate severity: the vehicle may still operate, but fault progression can increase repair cost over time.

Can you drive with P0705?

Most vehicles can be driven short-term with P0705, but postpone heavy load/highway driving until repaired.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

1. Repair obvious wiring/connector faults first to prevent repeat parts replacement.
2. Address the root fault mode (open) in the transmission range sensor circuit malfunction (prndl input) circuit/system.
3. Apply the required relearn/adaptation procedure if specified by service information.
4. Road-test and verify P0705 remains cleared under the conditions that originally set the code.

Fix options

• Clear corrosion and protect terminals.
• Restore continuity and verify pin tension.
• Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$300-$1500

Common mistakes when diagnosing P0705

• Replacing parts without verifying voltage, ground, and signal integrity first.
• Ignoring related stored/pending codes that indicate upstream faults.
• Skipping post-repair verification drive cycle and readiness checks.

P0705 in common vehicles

P0705 appears across makes such as BMW, Mercedes-Benz, Audi, Volvo. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes P0705?

P0705 is commonly set by open faults affecting transmission range sensor circuit malfunction (prndl input).

How much does it cost to fix P0705?

For P0705, repair costs are typically $300-$1500 depending on exact root cause, labor rates, and part quality.

Can I clear P0705 without repair?

You can clear P0705 temporarily, but the code usually returns until the underlying fault is corrected.

Helpful tools

• Estimate repair cost
• Decode your VIN
• Calculate fuel cost