Air Assisted Injector Control Range/Performance
The P0065 code means the vehicle's onboard diagnostic system has detected: Air Assisted Injector Control Range/Performance. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $200 - $500 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Rough idle or stalling
- Poor cold-start performance
- Increased emissions
Probable Causes (Ranked by Likelihood)
- Faulty air-assisted injector control valve Very High
- Clogged or restricted air injection passage High
- Vacuum leak in air injection system Moderate
- ECM control circuit malfunction Low
Frequently Asked Questions
What does P0065 mean?
P0065 indicates that the air-assisted injector control system is not performing within its expected range, affecting fuel atomization and cold-start performance.
Is P0065 common?
P0065 is relatively uncommon and is mostly found on European vehicles that use air-assisted fuel injection systems.
How do I fix P0065?
Inspect and replace the air-assisted injector control valve if faulty. Check for clogged air passages and vacuum leaks in the system.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Confirm P0065 with scan tool and review freeze frame data
-
Inspect air-assisted injector control valve for proper operation
-
Check air injection passages for blockages
-
Test vacuum lines and electrical connections to the control valve
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Commonly Affected Vehicles
- 2006-2014 Volkswagen Jetta 2.5L
- 2007-2015 Audi A3 2.0T
- 2008-2016 Volkswagen Passat
- 2009-2017 Audi A4
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