P11AA on Volkswagen
Camshaft Adjustment Actuator 'A', Cylinder 3 - Implausible Signal
P11AA on Volkswagen vehicles indicates camshaft adjustment actuator 'a', cylinder 3 - implausible signal. Au7o has documented this code across 1 Volkswagen model — most commonly on Touareg. This is a VAG (Volkswagen/Audi) manufacturer-specific code (Ross-Tech P11AA/004522) indicating an implausible signal from camshaft adjustment actuator 'A' on cylinder 3, part of the Audi Valve Lift System (AVS) that switches between intake cam lobe profiles. When detected, the affected actuator defaults to its standby position and unaffected actuators switch to the large valve-lift position, which can cause a loss of power in the lower (roughly 1000-3100 RPM) torque range. The fault is often logged without an EPC or Check Engine light because exhaust emissions are not degraded. Typical repair costs on Volkswagen range from $250 to $1,500, depending on the specific model and root cause.
Common Causes of P11AA
- •Wiring or connector fault to the cam adjustment actuator (short circuit or open)
- •Voltage supply failure to the cam adjustment actuators
- •Faulty or sticking cam adjustment actuator (each draws up to 3.0 A; 2009-2012 V6 FSI may need updated actuator per TSB 15-12-25)
- •Worn or damaged camshaft / cam element(s) on cylinder 3
- •Faulty engine control module (ECM)
- •Carbon buildup or mechanical binding preventing cam lobe switching
P11AA on Volkswagen by Model
Volkswagen Touareg(1 issue)
- AdBlue / SCR System Fault with No-Start Countdown Lockout (EU diesel)2011-2022
Euro 5/Euro 6 diesel Touaregs use an SCR system that injects AdBlue (DEF) to reduce NOx. Faults in this system — a failed NOx sensor, blocked AdBlue injector, failed AdBlue tank heater, or AdBlue crystallization/poor-quality fluid — trigger a dash warning and a legally-mandated no-start countdown ('No start possible in XXX km/starts'). Once the countdown reaches zero and the ignition is cycled, the vehicle will not restart, stranding the owner. This is especially relevant to EU-spec cars where SCR is fitted across the range. Common diagnostic faults include 'NOx Reductant Consumption too Low', 'Reductant Quality Performance', and NOx sensor signal-low codes.
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View P11AA across all makes →Frequently Asked Questions
What does P11AA mean on Volkswagen?▼
P11AA stands for "Camshaft Adjustment Actuator 'A', Cylinder 3 - Implausible Signal." This is a VAG (Volkswagen/Audi) manufacturer-specific code (Ross-Tech P11AA/004522) indicating an implausible signal from camshaft adjustment actuator 'A' on cylinder 3, part of the Audi Valve Lift System (AVS) that switches between intake cam lobe profiles. When detected, the affected actuator defaults to its standby position and unaffected actuators switch to the large valve-lift position, which can cause a loss of power in the lower (roughly 1000-3100 RPM) torque range. The fault is often logged without an EPC or Check Engine light because exhaust emissions are not degraded. On Volkswagen specifically, this code is documented across 1 model.
What causes P11AA on Volkswagen vehicles?▼
Common causes on Volkswagen: Wiring or connector fault to the cam adjustment actuator (short circuit or open), Voltage supply failure to the cam adjustment actuators, Faulty or sticking cam adjustment actuator (each draws up to 3.0 A; 2009-2012 V6 FSI may need updated actuator per TSB 15-12-25), Worn or damaged camshaft / cam element(s) on cylinder 3, Faulty engine control module (ECM). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P11AA on a Volkswagen?▼
Repair costs on Volkswagen range from $250 to $1,500, depending on the specific model and root cause.
Which Volkswagen models have P11AA documented?▼
Au7o has documented P11AA on 1 Volkswagen model: Touareg.