passat 1.8t fault codes p1654 p0411

[swebbym3]

my passat has thrown up these codes, p1654 electronic instrument panel and p0411 secondary air injection system faulty flow. car still drives fine,,engine light is on though,any ideas??

[passat 130 tdi]

16795/P0411/001041 - Secondary Air Injection System: Incorrect Flow Detected

Possible Symptoms


Malfunction Indicator Light (MIL) ON
Possible Causes


Fuel Pump Relay (J17) faulty
Hoses/Pipes to/between Components faulty/clogged
Secondary Air Injection Pump (V101) faulty
Secondary Air Injection Pump Relay (J299) faulty
Secondary Air Injection Solenoid Valve (N112) faulty
Possible Solutions


Check Fuel Pump Relay (J17)
Check Hoses/Pipes to/between Components

Check Secondary Air Injection Hoses/Pipes for Carbonization

Check Secondary Air Injection Pump (V101)
Check Secondary Air Injection Pump Relay (J299)
Check Secondary Air Injection Solenoid Valve (N112)


p0411 - Volkswagen:Please check DTC Memory of control panel ECU

This is a fault that normally tells you to scan the cluster for faults, this fault normally is a problem with a faulty coolant temp sensor. You will need a factory type scanner or VAG-COM program to clear the fault in the cluster. The Coolant temp sensor is a two part sensor i.e. four wires, two wires go to the cluster and two to the engine control unit. The cluster side probally failed or went open/closed short which triggered the fault.

[martin1810]

What engine code. Without knowing which engine the codes don't mean alot. You would be better off getting a vag-com scan as OBD codes are not reliable for diagnostics.