Audi Cars 1999-05

1.8L L4 VIN B Std 3

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Trouble Code: P0322



Ignition/Distributor Engine Input Circuit No Signal

Possible Causes:



Engine speed sensor has failed or is damaged
 
ECM has failed
 
Sensor wheel is damaged or doesn-t fit properly
 
Sensor wheel spacer isn-t seated properly
 

Trouble Code: P0327



Knock Sensor 1 Signal Low Input

Possible Causes:



Knock sensor circuit is open
 
Knock sensor is loose (tighten to 20 NM)
 
Contact between the knock sensor and cylinder block is dirty, corroded or greasy
 
Knock sensor circuit is shorted to ground, or shorted to power
 
Knock sensor is damaged or it has failed
 
Wrong kind of fuel used
 
A component in the engine compartment is loose or not properly secured
 
ECM has failed
 

Trouble Code: P0328



Knock Sensor 1 Signal High Input

Possible Causes:



Knock sensor circuit is open
 
Knock sensor is loose (tighten to 20 NM)
 
Contact between the knock sensor and cylinder block is dirty, corroded or greasy
 
Knock sensor circuit is shorted to ground, or shorted to power
 
Knock sensor is damaged or it has failed
 
Wrong kind of fuel used
 
A component in the engine compartment is loose or not properly secured
 
ECM has failed
 

Trouble Code: P0332



Knock Sensor 2 Signal Low Input

Possible Causes:



Knock sensor circuit is open
 
Knock sensor is loose (tighten to 20 NM)
 
Contact between the knock sensor and cylinder block is dirty, corroded or greasy
 
Knock sensor circuit is shorted to ground, or shorted to power
 
Knock sensor is damaged or it has failed
 
Wrong kind of fuel used
 
A component in the engine compartment is loose or not properly secured
 
ECM has failed
 

Trouble Code: P0333



Knock Sensor 2 Signal High Input

Possible Causes:



Knock sensor circuit is open
 
Knock sensor is loose (tighten to 20 NM)
 
Contact between the knock sensor and cylinder block is dirty, corroded or greasy
 
Knock sensor circuit is shorted to ground, or shorted to power
 
Knock sensor is damaged or it has failed
 
Wrong kind of fuel used
 
A component in the engine compartment is loose or not properly secured
 
ECM has failed
 

Trouble Code: P0340



Camshaft Position Sensor Circuit Malfunction

Possible Causes:



CMP sensor circuit is open or shorted to ground
 
CMP sensor circuit is shorted to power
 
CMP sensor ground (return) circuit is open
 
CMP sensor installation incorrect (Hall-effect type)
 
CMP sensor is damaged or CMP sensor shielding damaged
 
CMP sensor has failed
 
ECM has failed
 

Trouble Code: P0341



Camshaft Position Sensor Circ Range/Performance

Possible Causes:



CMP sensor circuit is open or shorted to ground
 
CMP sensor circuit is shorted to power
 
CMP sensor ground (return) circuit is open
 
CMP sensor installation incorrect (Hall-effect type)
 
CMP sensor is damaged or CMP sensor shielding damaged
 
ECM has failed
 

Trouble Code: P0342



Camshaft Position Sensor -A- Circuit (Bank 1 or Single Sensor) Low Input

Possible Causes:



CMP sensor circuit is open or shorted to ground
 
CMP sensor circuit is shorted to power
 
CMP sensor ground (return) circuit is open
 
CMP sensor installation incorrect (Hall-effect type)
 
CMP sensor is damaged or CMP sensor shielding damaged
 
ECM has failed
 

Trouble Code: P0351



Ignition Coilpack A Primary/Secondary Circuit Malfunction

Possible Causes:



Engine speed (RPM) sensor has failed
 
Camshaft Position (CMP) sensor has failed
 
Power Supply Relay is shorted to an open circuit
 
There is a malfunction in voltage supply
 
Ignition coilpack is damaged or it has failed
 
Cylinder 1 to 4 Fuel Injector(s) have failed
 
ECM has failed
 

Trouble Code: P0352



Ignition Coilpack B Primary/Secondary Circuit Malfunction

Possible Causes:



Engine speed (RPM) sensor has failed
 
Camshaft Position (CMP) sensor has failed
 
Power Supply Relay is shorted to an open circuit
 
There is a malfunction in voltage supply
 
Ignition coilpack is damaged or it has failed
 
Cylinder 1 to 4 Fuel Injector(s) have failed
 
ECM has failed
 

Trouble Code: P0353



Ignition Coilpack C Primary/Secondary Circuit Malfunction

Possible Causes:



Engine speed (RPM) sensor has failed
 
Camshaft Position (CMP) sensor has failed
 
Power Supply Relay is shorted to an open circuit
 
There is a malfunction in voltage supply
 
Ignition coilpack is damaged or it has failed
 
Cylinder 1 to 4 Fuel Injector(s) have failed
 
ECM has failed
 

Trouble Code: P0354



Ignition Coilpack D Primary/Secondary Circuit Malfunction

Possible Causes:



Engine speed (RPM) sensor has failed
 
Camshaft Position (CMP) sensor has failed
 
Power Supply Relay is shorted to an open circuit
 
There is a malfunction in voltage supply
 
Ignition coilpack is damaged or it has failed
 
Cylinder 1 to 4 Fuel Injector(s) have failed
 
ECM has failed
 

Trouble Code: P0411



Secondary Air Injection System Upstream Flow Detected

Possible Causes:



Air pump output is blocked or restricted
 
AIR bypass solenoid is leaking or it is restricted
 
AIR bypass solenoid is stuck open or stuck closed
 
Check valve (one or more) is damaged or leaking
 
Electric air injection pump hose(s) leaking
 
Electric air injection pump is damaged or faulty
 
ECM has failed
 

Trouble Code: P0412



Secondary Air Injection Solenoid Circuit Malfunction

Possible Causes:



AIR solenoid power circuit (B+) is open (check dedicated fuse)
 
AIR bypass solenoid control circuit is open or shorted to ground
 
AIR diverter solenoid control circuit open or shorted to ground
 
AIR pump control circuit is open or shorted to ground
 
Check valve (one or more) is damaged or leaking
 
Solid State relay is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0413



Secondary Air Injection Solenoid Circuit Open

Possible Causes:



AIR solenoid power circuit (B+) is open (check dedicated fuse)
 
AIR bypass solenoid control circuit is open or shorted to ground
 
AIR diverter solenoid control circuit open or shorted to ground
 
AIR pump control circuit is open or shorted to ground
 
Check valve (one or more) is damaged or leaking
 
Solid State relay is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0414



Secondary Air Injection Solenoid Circuit Short

Possible Causes:



AIR solenoid power circuit (B+) is open (check dedicated fuse)
 
AIR bypass solenoid control circuit is open or shorted to ground
 
AIR diverter solenoid control circuit open or shorted to ground
 
AIR pump control circuit is open or shorted to ground
 
Check valve (one or more) is damaged or leaking
 
Solid State relay is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0418



Secondary Air Injection Relay (A) Circuit Malfunction

Possible Causes:



AIR solenoid power circuit (B+) is open (check dedicated fuse)
 
AIR bypass solenoid control circuit is open or shorted to ground
 
AIR diverter solenoid control circuit open or shorted to ground
 
AIR pump control circuit is open or shorted to ground
 
Check valve (one or more) is damaged or leaking
 
Solid State relay is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0420



Catalyst System Efficiency (Bank 1) Below Threshold

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Catalytic converter is damaged, contaminated or it has failed
 
ECT/CHT sensor has lost its calibration (the signal is incorrect)
 
Engine cylinders misfiring, or the ignition timing is over retarded
 
Engine oil is contaminated
 
Front HO2S or rear HO2S is contaminated with fuel or moisture
 
Front HO2S and/or the rear HO2S is loose in the mounting hole
 
Front HO2S much older than the rear HO2S (HO2S-11 is lazy)
 
Fuel system pressure is too high (check the pressure regulator)
 
Rear HO2S wires improperly connected or the HO2S has failed
 

Trouble Code: P0422



Main Catalyst (Bank 1) Efficiency Below Threshold

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Catalytic converter is damaged, contaminated or it has failed
 
ECT/CHT sensor has lost its calibration (the signal is incorrect)
 
Engine cylinders misfiring, or the ignition timing is over retarded
 
Engine oil is contaminated
 
Front HO2S or rear HO2S is contaminated with fuel or moisture
 
Front HO2S and/or the rear HO2S is loose in the mounting hole
 
Front HO2S much older than the rear HO2S
 
Fuel system pressure is too high (check the pressure regulator)
 
Rear HO2S wires improperly connected or the HO2S has failed
 

Trouble Code: P0430



Catalyst System Efficiency (Bank 2) Below Threshold

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Catalytic converter is damaged, contaminated or it has failed
 
ECT/CHT sensor has lost its calibration (the signal is incorrect)
 
Engine cylinders misfiring, or the ignition timing is over retarded
 
Engine oil is contaminated
 
Front HO2S or rear HO2S is contaminated with fuel or moisture
 
Front HO2S and/or the rear HO2S is loose in the mounting hole
 
Front HO2S much older than the rear HO2S (HO2S-11 is lazy)
 
Fuel system pressure is too high (check the pressure regulator)
 
Rear HO2S wires improperly connected or the HO2S has failed
 

Trouble Code: P0440



EVAP System Malfunction

Possible Causes:



EVAP canister purge valve is damaged
 
EVAP canister has an improper seal
 
Vapor line between purge solenoid and intake manifold vacuum reservoir is damaged, or vapor line between EVAP canister purge solenoid and charcoal canister is damaged
 
Vapor line between charcoal canister and check valve, or vapor line between check valve and fuel vapor valves is damaged
 
ECM has failed
 

Trouble Code: P0441



EVAP Control System Incorrect Purge Flow

Possible Causes:



EVAP canister purge valve is damaged
 
EVAP canister has an improper seal
 
Vapor line between purge solenoid and intake manifold vacuum reservoir is damaged, or vapor line between EVAP canister purge solenoid and charcoal canister is damaged
 
Vapor line between charcoal canister and check valve, or vapor line between check valve and fuel vapor valves is damaged
 
ECM has failed
 

Trouble Code: P0442



EVAP Control System Small Leak Detected

Possible Causes:



Aftermarket EVAP parts that do not conform to specifications
 
CV solenoid remains partially open when commanded to close
 
EVAP component seals leaking (i.e., leaks in the Purge valve, fuel tank pressure sensor, canister vent solenoid, fuel vapor control valve tube assembly or fuel vapor vent valve).
 
Fuel filler cap damaged, cross-threaded or loosely installed
 
Loose fuel vapor hose/tube connections to EVAP components
 
Small holes or cuts in fuel vapor hoses or EVAP canister tubes
 

Trouble Code: P0443



EVAP Vapor Management Valve Circuit Malfunction

Possible Causes:



EVAP power supply circuit is open
 
EVAP solenoid control circuit is open or shorted to ground
 
EVAP solenoid control circuit is shorted to power (B+)
 
EVAP solenoid valve is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0444



Evaporative Emission System Purge Control Valve Circuit Open

Possible Causes:



EVAP power supply circuit is open
 
EVAP solenoid control circuit is open or shorted to ground
 
EVAP solenoid control circuit is shorted to power (B+)
 
EVAP solenoid valve is damaged or it has failed
 
EVAP canister has a leak or a poor seal
 
ECM has failed
 

Trouble Code: P0445



Evaporative Emission System Purge Control Valve Circuit Shorted

Possible Causes:



EVAP power supply circuit is open
 
EVAP solenoid control circuit is open or shorted to ground
 
EVAP solenoid control circuit is shorted to power (B+)
 
EVAP solenoid valve is damaged or it has failed
 
EVAP canister has a leak or a poor seal
 
ECM has failed
 

Trouble Code: P0455



EVAP Control System Large Leak Detected

Possible Causes:



Aftermarket EVAP hardware non-conforming to specifications
 
EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged
 
EVAP canister purge valve stuck closed, or canister damaged
 
Fuel filler cap missing, loose (not tightened) or the wrong part
 
Loose fuel vapor hose/tube connections to EVAP components
 
Canister vent (CV) solenoid stuck open
 
Fuel tank pressure (FTP) sensor has failed mechanically
 

Trouble Code: P0456



EVAP Control System Small Leak Detected

Possible Causes:



Aftermarket EVAP hardware non-conforming to specifications
 
EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged
 
EVAP canister purge valve stuck closed, or canister damaged
 
Fuel filler cap missing, loose (not tightened) or the wrong part
 
Loose fuel vapor hose/tube connections to EVAP components
 
Canister vent (CV) solenoid stuck open
 
Fuel tank pressure (FTP) sensor has failed mechanically
 

Trouble Code: P0491



Secondary Air Injection System Insufficient Flow (Bank 1)

Possible Causes:



Air pump output is blocked or restricted
 
AIR bypass solenoid is leaking or it is restricted
 
AIR bypass solenoid is stuck open or stuck closed
 
Check valve (one or more) is damaged or leaking
 
Electric air injection pump hose(s) leaking
 
Electric air injection pump is damaged or faulty
 
ECM has failed
 

Trouble Code: P0492



Secondary Air Injection System Insufficient Flow (Bank 2)

Possible Causes:



Air pump output is blocked or restricted
 
AIR bypass solenoid is leaking or it is restricted
 
AIR bypass solenoid is stuck open or stuck closed
 
Check valve (one or more) is damaged or leaking
 
Electric air injection pump hose(s) leaking
 
Electric air injection pump is damaged or faulty
 
ECM has failed
 

Trouble Code: P0501



Vehicle Speed Sensor or PSOM Range/Performance

Possible Causes:



VSS signal circuit is open or shorted to ground
 
VSS harness circuit is shorted to ground
 
VSS harness circuit is shorted to power
 
VSS circuit open between the ECM and related control module
 
VSS or wheel speed sensors circuits are damaged
 
Modules connected to VSC/VSS harness circuits are damaged
 
Mechanical drive mechanism for the VSS is damaged
 

Trouble Code: P0506



Idle Air Control System RPM Lower Than Expected

Possible Causes:



Air inlet is plugged or the air filter element is severely clogged
 
IAC circuit is open or shorted
 
IAC circuit VPWR circuit is open
 
IAC solenoid is damaged or has failed
 
ECM has failed
 
The VSS has failed
 

Trouble Code: P0507



Idle Air Control System RPM Higher Than Expected

Possible Causes:



Air intake leak located somewhere after the throttle body
 
IAC control circuit is shorted to chassis ground
 
IAC solenoid is damaged or has failed
 
Throttle Valve Control module has failed or is clogged with carbon
 
ECM has failed
 
The VSS has failed
 

Trouble Code: P0560



System Voltage Malfunction

Possible Causes:



Alternator damaged or faulty
 
Battery voltage low or insufficient
 
Fuses blown or circuits open
 
Battery connection to terminal not clean
 
Voltage regulator has failed
 

Trouble Code: P0562



System Voltage Low

Possible Causes:



Alternator damaged or faulty
 
Battery voltage low or insufficient
 
Fuses blown or circuits open
 
Battery connection to terminal not clean
 
Voltage regulator has failed
 

Trouble Code: P0563



System Voltage High

Possible Causes:



Alternator damaged or faulty
 
Battery voltage low or insufficient
 
Fuses blown or circuits open
 
Battery connection to terminal not clean
 
Voltage regulator has failed
 

Trouble Code: P0600



Serial Communication Link (Data BUS) Message Missing

Possible Causes:



ECM has failed
 
CAN data bus wires have short circuited to each other
 

Trouble Code: P0601



Internal Control Module Memory Check Sum Error

Possible Causes:



Battery terminal corrosion, or loose battery connection
 
Connection to the ECM interrupted, or the circuit has been opened
 
Reprogramming error has occurred
 
ECM has failed and needs replacement. Remember to check for Aftermarket Performance Products before replacing a ECM.
 

Trouble Code: P0602



Control Module Programming Error

Possible Causes:



During the VID reprogramming function, the Vehicle ID (VID) data block failed during reprogramming wit the Scan Tool.
 
Battery terminal corrosion, or loose battery connection
 
Connection to the ECM interrupted, or the circuit has been opened
 
Reprogramming error has occurred
 
ECM has failed and needs replacement. Remember to check for Aftermarket Performance Products before replacing a ECM.
 

Trouble Code: P0604



Internal Control Module Random Access Memory (RAM) Error

Possible Causes:



Battery terminal corrosion, or loose battery connection
 
Connection to the ECM interrupted, or the circuit has been opened
 
Reprogramming error has occurred
 
ECM has failed and needs replacement. Remember to check for Aftermarket Performance Products before replacing a ECM.
 

 
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