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P0705AudiAudi A4 HubAll Audi P0705High Severity

P0705 on Audi A4

Transmission Range Sensor Circuit Malfunction (PRNDL Input)

Factory diagnostic protocol and troubleshooting wire for fault code P0705 specifically for the Audi A4 (2020–2026, 2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP)).

Verified OEM Telemetry & Field Repair Tree
Audi A42020–2026
Audi A4
Sedan2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP)
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
A4 SAE Mode $01
ECU Network Bus
500 kbps CAN-FD
ISO 15765-4 Compliant
Drivability Status
Drivable (Short Trip)
High urgency level
Est. Repair Cost
$120 - $450 (DIY: $40 - $160)
Parts & Labor DIY
Check P0705 On Another Audi Model:
Diagnose P0705 on Specific A4 Model Year:

1. Symptoms of P0705 on Audi A4

When the Engine Control Module (ECM/PCM) on your Audi A4 (2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP)) logs fault code P0705, drivers commonly observe:

Check Engine Light on on Audi A4 (2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP))
Vehicle will not crank/start in Park (starts only in Neutral) on Audi A4 (2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP))
Gear indicator on dashboard (P R N D 1 2) is blank or displays wrong gear on Audi A4 (2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP))
Transmission shifts harshly or goes into 3rd gear limp mode on Audi A4 (2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP))
Reverse backup lights fail to illuminate on Audi A4 (2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP))
Audi A4 OBD-II Port Location
The 16-pin diagnostic connector is located Under driver side dashboard near hood release lever (pink/purple port). Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Audi A4

Historical warranty claims and technical repair bulletins for Audi A4 point to the following failure distribution:

55%
Misaligned or faulty Transmission Range Sensor / Neutral Safety Switch (NSS) (Audi OEM Part)
25%
Corroded or water-logged connector on transmission side (Audi OEM Part)
12%
Stretched or misadjusted shift linkage cable (Audi OEM Part)
8%
Broken internal switch contacts (Audi OEM Part)
* Source: Synthesized from NHTSA ODI field repair telemetry and verified OEM Technical Service Bulletin (TSB) repair tree frequency percentiles for Audi A4.

3. Step-by-Step DIY Repair Guide for Audi A4

01
Check PRNDL Live Data

Move gear selector through all positions while monitoring scan tool TR PID to see which gear positions fail to register. on the Audi A4 equipped with 2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP).

Required Tool: OBD-II Scanner
02
Inspect Shift Cable Alignment

Ensure the mechanical shift linkage fully clicks the transmission lever into the physical detent for Park and Neutral. on the Audi A4 equipped with 2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP).

Required Tool: Pliers, Socket Set
03
Test Neutral Safety Switch Continuity

Use multimeter to check continuity across switch pins in Park, Reverse, Neutral, and Drive. on the Audi A4 equipped with 2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP).

Required Tool: Digital Multimeter
04
Replace or Re-align Range Sensor

Loosen mounting bolts, use alignment pin to align sensor slot with transmission shaft in Neutral, torque bolts, or install new OEM sensor. on the Audi A4 equipped with 2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP).

Required Tool: 10mm/12mm Sockets, Alignment Pin
05
Clear Trouble Codes and Verify Starting

Clear DTCs and confirm engine starts in Park and Neutral, reverse lights activate, and gear display is accurate. on the Audi A4 equipped with 2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP).

Required Tool: OBD-II Scanner
Recommended Parts & Testing Tools

Equipment for Diagnosing Audi A4 (P0705)

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Audi A4 OEM Replacement Sensor

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Direct-fit replacement assembly engineered to OEM tolerances for Audi A4.

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Sensor Signal Voltage Meter

AstroAI Auto-Ranging Digital Multimeter

4.6 / 5.0 (Best Seller)

Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.

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BlueDriver Bluetooth Pro OBDII Scan Tool

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Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.

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Other Common Fault Codes on Audi A4

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Audi A4:

4. Audi A4 P0705 FAQs

What causes code P0705 to trigger on a Audi A4?

On the Audi A4 (2.0L TFSI Turbo 4-Cyl (EA888 Gen 4 201HP–261HP)), P0705 is most frequently caused by Misaligned or faulty Transmission Range Sensor / Neutral Safety Switch (NSS) or Corroded or water-logged connector on transmission side.

Where is the OBD-II port located on my Audi A4?

On the Audi A4, the 16-pin DLC diagnostic connector is located Under driver side dashboard near hood release lever (pink/purple port). Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.

Can I safely drive my Audi A4 with code P0705?

Caution. Vehicle may not start in Park, backup lights may not work, and transmission may lock in Limp Mode. Given that P0705 carries a High severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.