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P0354AudiAudi Q7 HubAll Audi P0354Critical Severity

P0354 on Audi Q7

Ignition Coil D Primary/Secondary Circuit Malfunction

Factory diagnostic protocol and troubleshooting wire for fault code P0354 specifically for the Audi Q7 (2020–2026, 2.0L TFSI (45 TFSI 261HP) / 3.0L Turbo V6 (SQ7 500HP)).

Verified OEM Telemetry & Field Repair Tree
Audi Q72020–2026
Audi Q7
SUV • 2.0L TFSI (45 TFSI 261HP) / 3.0L Turbo V6 (SQ7 500HP)
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
Q7 SAE Mode $01
ECU Network Bus
500 kbps CAN-FD
ISO 15765-4 Compliant
Drivability Status
Not Recommended
Critical urgency level
Est. Repair Cost
$100 - $350 (DIY: $30 - $90)
Parts & Labor DIY
Check P0354 On Another Audi Model:
Audi A4Audi Q5Audi A6Audi Q7Audi Q3Audi e-tron
Diagnose P0354 on Specific Q7 Model Year:
2025 Q7 P03542024 Q7 P03542023 Q7 P03542022 Q7 P03542021 Q7 P03542020 Q7 P03542019 Q7 P03542018 Q7 P03542017 Q7 P03542016 Q7 P03542015 Q7 P03542014 Q7 P0354

1. Symptoms of P0354 on Audi Q7

When the Engine Control Module (ECM/PCM) on your Audi Q7 (2.0L TFSI (45 TFSI 261HP) / 3.0L Turbo V6 (SQ7 500HP)) logs fault code P0354, drivers commonly observe:

Flashing CEL on Audi Q7 (2.0L TFSI (45 TFSI 261HP) / 3.0L Turbo V6 (SQ7 500HP))
Rough running on Audi Q7 (2.0L TFSI (45 TFSI 261HP) / 3.0L Turbo V6 (SQ7 500HP))
Loss of power on Audi Q7 (2.0L TFSI (45 TFSI 261HP) / 3.0L Turbo V6 (SQ7 500HP))
P0304 code on Audi Q7 (2.0L TFSI (45 TFSI 261HP) / 3.0L Turbo V6 (SQ7 500HP))
Audi Q7 OBD-II Port Location
The 16-pin diagnostic connector is located Under driver side lower dash near hood release lever. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Audi Q7

Historical warranty claims and technical repair bulletins for Audi Q7 point to the following failure distribution:

55%
Dead Cylinder 4 ignition coil (Audi OEM Part)
25%
Wiring damage (Audi OEM Part)
12%
Corroded connector (Audi OEM Part)
* Source: Synthesized from NHTSA ODI field repair telemetry and verified OEM Technical Service Bulletin (TSB) repair tree frequency percentiles for Audi Q7.

3. Step-by-Step DIY Repair Guide for Audi Q7

01
Test Coil with Swap Method

Swap Coil 4 to Cylinder 1. on the Audi Q7 equipped with 2.0L TFSI (45 TFSI 261HP) / 3.0L Turbo V6 (SQ7 500HP).

Required Tool: 10mm Socket
02
Replace Coil 4

Install new OEM coil pack. on the Audi Q7 equipped with 2.0L TFSI (45 TFSI 261HP) / 3.0L Turbo V6 (SQ7 500HP).

Required Tool: Socket Set
03
Clear DTCs

Clear memory and road test. on the Audi Q7 equipped with 2.0L TFSI (45 TFSI 261HP) / 3.0L Turbo V6 (SQ7 500HP).

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

Equipment for Diagnosing Audi Q7 (P0354)

Prime Fast Delivery & Verified Fitment
OEM Ignition Component

Direct-Fit Laser Iridium Spark Plugs (Set of 4/6)

4.8 / 5.0 (Top Rated)

Pre-gapped iridium spark plugs engineered to restore smooth combustion on Audi Q7.

$36 – $68 Prime
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Ignition Service Tool

Magnetic Swivel Spark Plug Socket Set

4.8 / 5.0 (Amazon Choice)

360-degree magnetic swivel socket prevents ceramic plug cracks inside deep engine spark wells.

$16.99 Prime
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Top Mobile OBD-II Scanner

BlueDriver Bluetooth Pro OBDII Scan Tool

4.7 / 5.0 (50,000+ Reviews)

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 Q7

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Audi Q7:

P0300Automotive
Random or Multiple Cylinder Misfire Dete...
View Q7 Fix
P0420Automotive
Catalyst System Efficiency Below Thresho...
View Q7 Fix
P0171Automotive
System Too Lean (Bank 1)...
View Q7 Fix
P0128Automotive
Coolant Temperature Below Thermostat Reg...
View Q7 Fix
P0455Automotive
Evaporative Emission Control System Leak...
View Q7 Fix
P0101Automotive
Mass Air Flow (MAF) Sensor Circuit Range...
View Q7 Fix

4. Audi Q7 P0354 FAQs

What causes code P0354 to trigger on a Audi Q7?

On the Audi Q7 (2.0L TFSI (45 TFSI 261HP) / 3.0L Turbo V6 (SQ7 500HP)), P0354 is most frequently caused by Dead Cylinder 4 ignition coil or Wiring damage.

Where is the OBD-II port located on my Audi Q7?

On the Audi Q7, the 16-pin DLC diagnostic connector is located Under driver side lower dash near hood release lever. 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 Q7 with code P0354?

No. Cylinder 4 ignition coil has failed. Given that P0354 carries a Critical severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.