1. What is P2119 in Audi Q5?

The P2119 OBD-II code stands for Throttle Actuator Control Module Performance / Intermittent Circuit. For the Audi Q5 45 TFSI quattro (2020-2024)—a top-selling European luxury SUV with massive consumer and enthusiast demand—it targets the electronic throttle control (ETC) module in its EA888 Gen4 2.0T engine, standard in 45 TFSI, SQ5, and Q5 Sportback trims (paired with 7-speed S tronic dual-clutch transmission).

The ETC module integrates the throttle actuator (servo motor) and position sensors, communicating with the ECU via a 5V reference circuit. Unlike persistent faults (e.g., P2110), P2119 triggers when the ECU detects intermittent signal drops, voltage fluctuations, or inconsistent performance (lasting <2 seconds) from the ETC module—symptoms that come and go, often linked to loose connections or wear-related intermittent failures.

Audi Q5 Specific Note: This code is widespread in 2021-2023 Q5 45 TFSI models, per Audi Technical Service Bulletin (TSB) 23-04-08. The EA888 Gen4’s ETC module (#06K128063A) uses a multi-pin connector prone to pin wear from engine vibration—loose contacts cause intermittent signal loss that triggers P2119, especially in stop-and-go driving.

2. Common Causes of P2119 in 2020-2024 Q5

P2119 in Audi Q5 EA888 Gen4 models stems from intermittent ETC module or circuit issues—below are real-world cases diagnosed with the ICARZONE UR800’s intermittent fault detection tools:

• ETC Module Connector Pin Wear (2022 Q5 45 TFSI): An owner with 45,000 miles reported occasional limp mode. The UR800’s Intermittent Signal Test caught 3 voltage drops (>0.5V fluctuation) in the ETC circuit. Cleaning and reseating the connector (per TSB 23-04-08) fixed P2119.
• Throttle Actuator Motor Intermittent Failure (2023 Q5 Sportback): A Sportback owner’s P2119 appeared only during cold starts. The UR800’s Cold-Start Actuator Test showed the motor struggled to initialize (intermittent 0V signal). Replacing the ETC module (#06K128063A) resolved the issue.
• Wiring Harness Intermittent Short (2021 Q5 45 TFSI): A 2021 Q5 owner’s P2119 triggered when hitting bumps. The UR800’s Dynamic Circuit Test detected a short (0Ω resistance) only during vibration. Repairing a frayed wire near the engine mount fixed the intermittent fault.
• ECU Communication Glitch (2020 SQ5): An SQ5 owner’s P2119 reappeared after a software update. The UR800’s ECU ETC Sync Test showed intermittent communication drops. Relearning the ETC module via UR800 restored consistent signal flow.

3. Key Symptoms of P2119 in EA888 Gen4

P2119 symptoms in the Audi Q5 are intermittent (come and go) but distinctive—watch for these signs of ETC module performance or circuit issues:

4. Q5 Trims/Engines Prone to P2119

Audi service data highlights these 2020-2024 Q5 configurations with the highest P2119 occurrence rates (all EA888 Gen4 engines):

5. Diagnose P2119 with ICARZONE UR800

Diagnosing intermittent P2119 requires tools that capture fleeting faults—use the ICARZONE UR800’s Audi-specific intermittent detection features. Follow these steps (engine at operating temperature; battery voltage 12.4–12.7V):

Case Example: A 2022 Q5 45 TFSI failed Step 2 (0.8V signal fluctuation) and Step 5 (TSB 23-04-08 eligible). The UR800’s Component Location Tool guided ETC connector access (driver-side of the intake manifold). Inspection revealed worn pins—cleaning and reseating with dielectric grease stabilized the signal, clearing P2119.

6. How to Fix P2119 in Audi Q5

Resolve intermittent P2119 in your Q5 with these UR800-verified solutions—tailored to the EA888 Gen4’s ETC system:

1. Clean/Reseat ETC Module Connector (Most Common Fix for TSB 23-04-08)

1. Confirm connector wear via UR800’s Step 2. Disconnect the negative battery terminal and remove the engine cover (4 Torx T30 screws).
2. Locate the ETC module connector: Driver-side of the intake manifold, attached to the throttle body (6-pin black connector with a red release tab).
3. Press the red tab and disconnect the connector. Inspect pins for wear, corrosion, or bent contacts (common in TSB 23-04-08 cases).
4. Clean pins with electrical contact cleaner (#CRC 05103) and a small brush. Apply dielectric grease (#Permatex 81150) to pins to reduce vibration-induced wear.
5. Reseat the connector until it clicks. Secure the wiring harness to the intake bracket with zip ties—minimizes engine vibration impact.
6. Reconnect the battery. Use UR800 to retest ETC signal (fluctuation <0.2V). Clear P2119 and test drive—verify no intermittent hesitation.

2. Replace ETC Module (for Intermittent Actuator Failure)

1. Confirm actuator failure via UR800’s Step 4. Disconnect the ETC connector and remove the throttle body mounting bolts (4 Torx T25 screws).
2. Remove the throttle body (integrated with ETC module) from the intake manifold. Inspect for internal motor wear (grinding noise when manually rotating the plate).
3. Install an OEM ETC module/throttle body:
   • 2020-2022 Q5: #06K128063A
   • 2023-2024 Q5: #06K128063B (enhanced connector pins)
   Torque the mounting bolts to 8 ft-lbs.
4. Reconnect the ETC connector and battery. Use UR800 to perform ETC Module Adaptation (resets ECU learned values).
5. Test cold-start initialization via UR800. Clear P2119 and drive for 50 miles—confirm no intermittent faults.

3. Repair Wiring Harness (for Intermittent Shorts/Opens)

1. Confirm wiring issue via UR800’s Step 3. Trace the ETC wiring from the module to the ECU (passenger-side firewall).
2. Identify frayed or damaged sections (common near engine mounts). Cut the damaged segment (wire cutters) and strip 1/4 inch of insulation.
3. Splice with vibration-resistant heat-shrink connectors (#Dorman 84715). Crimp and apply heat to seal—ensures no future intermittent contact.
4. Wrap the repaired section with abrasion-resistant tape (#3M 33+). Secure the harness to the engine bay with anti-vibration clips.
5. Use UR800 to retest dynamic continuity (stable resistance during vibration). Clear P2119 and test drive over rough roads—verify no fault recurrence.

7. P2119 Repair Costs & Maintenance Tips

P2119 repair costs for the Audi Q5 EA888 Gen4 vary by cause. Use this table to budget for intermittent ETC faults:

Maintenance Tips for Q5 Owners

• Q5 45 TFSI (2021-2023): Clean and reseat the ETC connector every 30,000 miles—apply dielectric grease to prevent pin wear and P2119 (complies with TSB 23-04-08).
• Q5 Sportback owners: Replace the ETC module every 70,000 miles (preventive) — use OEM #06K128063B to avoid intermittent actuator failure.
• Inspect ETC wiring every 25,000 miles—secure loose harnesses with anti-vibration clips, especially near engine mounts, to prevent intermittent shorts.
• Perform ETC module adaptation via UR800 after battery disconnection or software updates—ensures consistent ECU communication and avoids false P2119 codes.
• Run the UR800’s Intermittent ETC Health Check every 15,000 miles — captures fleeting signal drops before they trigger P2119 and leave you stranded.

8. Q5-Specific FAQs