242 VW Golf & GTI Quick Reference Specication Book • September 2012
Speed and Idle Control
DTC Error Message Malfunction Criteria and
Threshold Value
P050A Cold Start Idle Air Control
System Performance
Out of range low:
• Engine speed deviation < -80
RPM
Out of range high:
• Engine speed deviation > 80
RPM
P0501 Vehicle Speed Sensor Range/
Performance
VSS signal < 4 km/h
P0506 Idle Air Control System RPM
Lower Than Expected
Idle speed Deviation > 80 RPM
P0507 Idle Air Control System - RPM
Higher Than Expected
Idle speed Deviation < -80 RPM
P052A Cold Start Camshaft Position
Timing Over-Advanced
• Difference between target
position vs actual position: >
6 °CRK
Control Module and Output Signals
DTC Error Message Malfunction Criteria and
Threshold Value
P0601 Internal Control Module
Memory Check Sum Error
Internal check sum, incorrect
P0604 Internal Control Module
Random Access Memory
(RAM) Error
Write ability check, failed
P0605 Internal Control Module Read
Only Memory (ROM) Error
ROM check failed
P0606 ECM Processor Fault ECM internal check failure
P0638 Throttle Actuator Control
Performance • Time to close to reference
point > 0.6 Sec.
and
• Reference point 2.88%
• Time to close below reference
point, + 2.49%, > 0.56 Sec.
• Duty cycle > 80%
• ECM power stage no failure
P0641 Sensor Reference Voltage A
Circuit
Signal voltage deviation > ± 0.3
V
P0642 Sensor Reference Voltage A
Circuit Low
Signal voltage < 4.6 to 5 V
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