Silverado 2008

4.8L V8 VIN C Auto 16

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Trouble Code: P0459



Evaporative Emission (EVAP) Purge Solenoid Control Circuit High Voltage

Possible Causes:



EVAP purge solenoid control circuit for a shorted to ground.
 
EVAP purge solenoid shorted to voltage or an open/high resistance
 
Faulty EVAP purge solenoid.
 
ECM has failed
 

Trouble Code: P046C



Exhaust Gas Recirculation (EGR) Position Sensor Performance

Possible Causes:



P046C
 
The difference between the actual EGR position and the desired EGR position is more than 3 percent.
 
The above condition is present for more than 10 seconds.
 

Trouble Code: P0496



Evaporative Emission System Flow During Non-Purge

Possible Causes:



The ECM detects more than 10 inch H2O vacuum for 5 seconds during a non-purge condition.
 

Trouble Code: P0496



Evaporative Emission System Flow During Non-Purge

Possible Causes:



The ECM detects greater than 10 inch H2O (2.49 kPa) vacuum for 5 seconds during a non-purge condition.
 

Trouble Code: P0497



Evaporative Emission (EVAP) Vent Solenoid Valve Control Circuit Low Voltage

Possible Causes:



Vent solenoid control circuit is open or shorted to ground
 
Vent solenoid control circuit is shorted to system power (B+)
 
Vent solenoid power circuit is open
 
Vent solenoid is damaged or has failed
 
ECM has failed
 

Trouble Code: P0502



Vehicle Speed Sensor (VSS) Absence of Signal

Possible Causes:



The difference between the two output speed signals is greater than 8 km/h (5 mph) for more than 1 second.
 

Trouble Code: P0502



Vehicle Speed Sensor (VSS) Circuit Low Voltage

Possible Causes:



P0502
 
The transmission output speed is 58 RPM or less for 5 seconds.
 

Trouble Code: P0503



Vehicle Speed Sensor (VSS) Circuit Intermittent

Possible Causes:



P0503
 
The transmission output speed drops 351 RPMs in less than 3 seconds.
 

Trouble Code: P0506



Idle Speed Low

Possible Causes:



P0506
 
The actual idle speed is approximately 90 RPM lower than the desired idle speed.
 

Trouble Code: P0506



Idle Speed Low

Possible Causes:



P0506
 
The ECM detects the actual idle speed is at least 100 RPM below the desired idle speed for greater than 19 seconds.
 

Trouble Code: P0507



Idle Speed High

Possible Causes:



P0507
 
The actual idle speed is approximately 180 RPM greater than the desired idle speed.
 

Trouble Code: P0507



Idle Speed High

Possible Causes:



P0507
 
The ECM detects the actual idle speed is at least 200 RPM above the desired idle speed for greater than 19 seconds.
 

Trouble Code: P050A



Engine Oil Pressure Sensor Circuit Low Input

Possible Causes:



Engine oil level it too low
 
EOP sensor signal circuit is open or shorted to ground
 
EOP sensor VREF circuit is open
 
EOP sensor is damaged or has failed
 
Instrument Cluster or ECM has failed
 

Trouble Code: P0545



Exhaust Temperature Sensor 1 (EGT-1) Circuit Low Voltage

Possible Causes:



P0545
 
The ECM detects that the EGT sensor is less than 0.32V for greater than 1 second.
 

Trouble Code: P0546



Exhaust Temperature Sensor 1 (EGT-1) Circuit High Voltage

Possible Causes:



P0546
 
The ECM detects that the EGT sensor is greater than 3.37V for greater than 1 second.
 

Trouble Code: P0562



System Voltage Low - FPCM

Possible Causes:



The FPCM detects that the battery voltage is less than 9 V.
 

Trouble Code: P0562



System Voltage Low

Possible Causes:



P0562
 
The TCM detects system voltage is 11 volts or less for 10 seconds.
 

Trouble Code: P0562



System Voltage Low

Possible Causes:



DTC P0562
 
The TCM detects system voltage is 11 volts or less for 4 seconds.
 

Trouble Code: P0563



System Voltage High - FPCM

Possible Causes:



The FPCM detects that the system voltage is greater than 17.5 V.
 

Trouble Code: P0563



System Voltage High

Possible Causes:



P0563
 
The TCM detects system voltage is 18 volts or greater for 10 seconds.
 

Trouble Code: P0563



System Voltage High

Possible Causes:



DTC P0563
 
The TCM detects system voltage is 18 volts or greater for 10 seconds.
 

Trouble Code: P0571



Cruise Control Brake Switch Circuit

Possible Causes:



The ECM detects a low voltage signal on the brake switch signal circuit when the serial data message from the BCM indicates the brakes are applied.
 

Trouble Code: P0572



Brake Switch Circuit 1 Low Voltage

Possible Causes:



P0572
 
The ECM detects a low voltage signal on the stop lamp switch signal circuit for more than 2 seconds when the serial data message from the BCM indicates the brakes are applied. The ECM sets the DTC when the condition has been detected 8 out of 10 times.
 

Trouble Code: P0573



Brake Switch Circuit 1 High Voltage

Possible Causes:



P0573
 
The ECM detects a high voltage signal on the stop lamp switch signal circuit for more than 2 seconds when the serial data message from the BCM indicates the brakes are released. The ECM sets the DTC when the condition has been detected 8 out of 10 times.
 

Trouble Code: P0575



Cruise Control Switch Signal Circuit

Possible Causes:



The ECM receives an invalid cruise control switch status serial data message from the BCM.
 
This diagnostic runs continuously.
 

Trouble Code: P0601



Control Module Torque Performance

Possible Causes:



Voltage and ground inputs to the ECM
 
High resistance, short or open condition to the ECM
 
ECM is not properly programmed
 
ECM has failed
 

Trouble Code: P0602



Control Module Long Term Memory Reset

Possible Causes:



Check the voltage and ground inputs to the ECM for a, short, open or high resistance
 
ECM has failed
 

Trouble Code: P0603



Control Module Random Access Memory (RAM)

Possible Causes:



Check the voltage and ground inputs to the ECM for a, short, open or high resistance
 
ECM has failed
 

Trouble Code: P0604



Control Module Programming Read Only Memory (ROM)

Possible Causes:



The ECM must be replaced to correct this problem. A new ECM must be programmed with the correct software/calibration.
 

Trouble Code: P0606



Control Module Performance

Possible Causes:



Check the voltage and ground inputs to the ECM for a, short, open or high resistance
 
ECM has failed
 

Trouble Code: P0607



Vehicle Speed Output Circuit Malfunction

Possible Causes:



VSS output signal circuit is open, shorted to ground or to power
 
VSS output signal problem related to the Instrument Cluster or the Electronic Suspension Control Module (internal problem)
 
ECM has failed
 

Trouble Code: P060B



Control Module Analog to Digital Performance

Possible Causes:



P060B
 
The ECM detects an incorrect internal analog/digital (A/D) signal for less than 1 second.
 
This DTC runs continuously.
 

Trouble Code: P060D



Control Module Vehicle Options Incorrect

Possible Causes:



ECM is not properly programmed
 
ECM has failed
 

Trouble Code: P0613



Transmission Control Module (TCM) Processor

Possible Causes:



DTC P0613 sets if the TCM does not complete two processing loops within the allotted time.
 

Trouble Code: P0615



Starter Relay Control Circuit

Possible Causes:



The control circuit of the STRTR relay is shorted to ground for 2 seconds.
 

Trouble Code: P0615



Starter Relay Control Circuit

Possible Causes:



The control circuit of the STRTR relay is open or shorted to voltage for 2 seconds when the ignition switch is in the ON position.
 
The control circuit of the STRTR relay is shorted to ground for 5 seconds when the ignition switch is in the start position.
 

Trouble Code: P061C



Control Module Engine Speed Performance

Possible Causes:



P061C
 
The ECM detects that there is a difference between the CKP engine speed and the calculated engine speed of more than 320 RPM for less than 1 second.
 
This diagnostic runs continuously.
 

Trouble Code: P061C



Control Module Engine Speed Performance

Possible Causes:



The PTOM detects that the requested RPM and the actual engine RPM do not match.
 
The above condition is present for greater than a predetermined time threshold.
 

Trouble Code: P0622



Generator F-Terminal Circuit

Possible Causes:



The GEN F-Terminal Signal is greater than 65 percent for 20 seconds.
 

Trouble Code: P0622



Generator F-Terminal Circuit

Possible Causes:



The GEN F-Terminal Signal is less than 5 percent for 30 seconds.
 

 
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