Family lead codes
Brand hub
Audi OBD-II Trouble Codes
Audi brand routing for direct-injection pressure control, lean-at-idle faults, secondary-air problems, and module communication issues across the existing VAG code coverage, giving premium-brand searchers a clearer landing page than a Volkswagen-only path.
This hub belongs to the Volkswagen Auto Group pathways route. Premium VAG route for direct-injection and communication fault searches. Users can then pivot into sibling brands without restarting from the homepage.
Segment: VAG family · Priority tier: support · Family size: 2 hubs
Thin but intentional entry page: this badge-specific hub exists to catch direct owner searches, but the deepest family coverage starts with Volkswagen.
Brand position
How this hub fits the family
Audi sits in the volkswagen auto group pathways cluster as a support route. Use it when owner intent is brand-specific, then pivot back to the family lead for broader code coverage.
Support branches
More badge-specific pivots
- This family currently resolves through core and expansion hubs.
Thin direct-entry badges in this family: Audi.
Family context
Volkswagen Auto Group pathways
Volkswagen and Audi hubs are strongest when they expose lean-idle, fuel-pressure, secondary-air, and gateway fault overlap together.
Why this hub matters: Good candidate for deeper premium + mainstream pairing.
Shared systems: direct injection fuel pressure, secondary air injection, intake manifold runner control, gateway / CAN communication
Shared fault themes: lean idle behavior, long-crank fuel delivery issues, emissions readiness failures
Best starting points
Audi diagnostic routes
Sibling hubs
Stay inside the family graph
Top code routes
Audi first-click codes
Top symptom routes
Best symptom pivots
Cross-brand pivots
Where to go next if this badge is not the whole story
- BMW · 102 mapped codes — Anchor premium-brand diagnosis, then pivot into Audi or Volkswagen when platform overlap appears
- Volkswagen · 58 mapped codes — Start here for mainstream VAG lean-idle and fuel-pressure complaints
Common codes
Audi trouble code pages
- P0173 — Fuel Trim Malfunction (Bank 2)
- P2187 — System Too Lean at Idle (Bank 1)
- P2189 — System Too Lean at Idle (Bank 2)
- P2188 — System Too Rich at Idle (Bank 1)
- P0181 — Fuel Temperature Sensor A Circuit Range/Performance
- P0091 — Fuel Pressure Regulator 1 Control Circuit Low
- P0092 — Fuel Pressure Regulator 1 Control Circuit High
- P2290 — Fuel Pressure Regulator 2 Control Circuit
- P2291 — Injector Control Pressure Too Low - Engine Cranking
- P2293 — Fuel Pressure Regulator 2 Performance
- P2294 — Fuel Pressure Regulator 2 Control Circuit/Open
- P2295 — Fuel Pressure Regulator 2 Control Circuit Low
- P2296 — Fuel Pressure Regulator 2 Control Circuit High
- P0410 — Secondary Air Injection System Malfunction
- P0411 — Secondary Air Injection System Incorrect Flow Detected
- P0412 — Secondary Air Injection System Switching Valve A Circuit Malfunction
- P0413 — Secondary Air Injection System Switching Valve A Circuit Open
- P0414 — Secondary Air Injection System Switching Valve A Circuit Shorted
- P0415 — Secondary Air Injection System Switching Valve B Circuit Malfunction
- P0416 — Secondary Air Injection System Switching Valve B Circuit Open
- P0417 — Secondary Air Injection System Switching Valve B Circuit Shorted
- P0418 — Secondary Air Injection System Relay A Circuit Malfunction
- P0419 — Secondary Air Injection System Relay B Circuit Malfunction
- P023F — Fuel Pump Secondary Circuit/Open
- P0627 — Fuel Pump A Control Circuit/Open
- P2401 — EVAP Leak Detection Pump Control Circuit Low
- P2402 — EVAP Leak Detection Pump Control Circuit High
- P2404 — EVAP Leak Detection Pump Sense Circuit Range/Performance
- U0073 — Control Module Communication Bus Off
- U0109 — Lost Communication With Fuel Pump Control Module
- U0126 — Lost Communication With Steering Angle Sensor Module
- U0146 — Lost Communication With Gateway “A”
Symptoms
Frequent symptom paths
Connected paths
Cross-brand diagnostic pivots
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Connected paths
Brand-relevant guides
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Built to keep related fixes, symptoms, and hubs one step away.
How to Read Live Fuel Trim Data Without GuessingHow to Test an EVAP Purge Valve Without GuessingVacuum Leak Checklist for Lean Codes and Rough IdleHard Start Diagnostic Order for OBD-II VehiclesReduced Power Initial ChecklistLong Crank Diagnostic Order Before Replacing SensorsNo Start But Cranks Checklist for OBD-II VehiclesRefuel-Related Hard Start Checklist: Purge, Vent, and Pressure CluesPurge Valve Stuck Open vs Flooded Charcoal Canister: How to Tell Which One Is Causing the Refuel ProblemEVAP Vent Valve vs Purge Valve: How to Tell Which Side of EVAP Is FailingP0420 vs Bad O2 Sensor vs Exhaust Leak: How to Tell Which One Is Actually Setting the StoryExhaust Leak vs Bad O2 Sensor vs True Lean Condition: How to Tell Which Story the Engine Is Actually TellingP0016 vs P0335 vs P0340: How to Tell Timing Correlation from Crank or Cam Signal FailureStartup Rattle with P0016 or P0017: What It Usually MeansP0011 vs P0016 vs P0340: VVT Solenoid, Sensor, or Timing Chain?Long Crank Hot vs Cold: What Cam, Crank, and EVAP Codes Are Trying to Tell YouPost-Catalyst Fuel Trim Codes vs Rear O2 Sensor vs Catalytic Converter: How to Tell Which One Is Actually WrongP0700 vs P0715 vs P0730: How to Split Bad Transmission Data from Real SlipBattery Light On: Bad Battery, Alternator, or Wiring?P219A / P219B vs P0300 vs P0171 / P0174: Bank Imbalance or General Lean-Misfire Problem?Fuel Rail Pressure Sensor vs Regulator Control: How to Tell Which Side of the Fuel System Is Actually FailingEVAP Leak Detection Pump vs Vent Valve vs Switching Valve: How to Tell Which EVAP Hardware Is Actually FailingFailed Emissions Test: Active Code vs Monitor Not ReadyPCM Power Relay vs Battery vs Ignition Switch: How to Split a No-Start Power ProblemSecurity Light On: Wrong Key vs Immobilizer Module vs Power ProblemReduced Engine Power: Throttle Body vs Pedal vs Low VoltageHard Brake Pedal: Brake Booster vs Vacuum Leak vs Pressure SensorEngine Runs Too Cool: Thermostat vs Sensor vs WiringP0125 vs P0128 vs P0118: Open Loop Too Long vs Thermostat vs False-Cold ECT
Connected paths
Audi symptom paths
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