Silverado 2008

4.8L V8 VIN C Auto 13

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Trouble Code: P0193



Fuel Rail Pressure Sensor Circuit High Voltage

Possible Causes:



FRP sensor signal circuit is open between sensor and the ECM
 
FRP Sensor ground circuit is open between sensor and ECM
 
FRP sensor signal circuit is shorted to VREF or system power
 
FRP Sensor is damaged or has failed
 
ECM has failed
 

Trouble Code: P0201



Fuel Injector 1 Control Circuit Malfunction

Possible Causes:



Injector 1 power circuit (B+) is open (check the power fuse)
 
Injector 1 control circuit is open between injector and ECM
 
Injector 1 control circuit is grounded between injector and ECM
 
Injector 1 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0202



Fuel Injector 2 Control Circuit Malfunction

Possible Causes:



Injector 2 power circuit (B+) is open (check the power fuse)
 
Injector 2 control circuit is open between injector and ECM
 
Injector 2 control circuit is grounded between injector and ECM
 
Injector 2 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0203



Fuel Injector 3 Control Circuit Malfunction

Possible Causes:



Injector 3 power circuit (B+) is open (check the power fuse)
 
Injector 3 control circuit is open between injector and ECM
 
Injector 3 control circuit is grounded between injector and ECM
 
Injector 3 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0204



Fuel Injector 4 Control Circuit Malfunction

Possible Causes:



Injector 4 power circuit (B+) is open (check the power fuse)
 
Injector 4 control circuit is open between injector and ECM
 
Injector 4 control circuit is grounded between injector and ECM
 
Injector 4 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0205



Fuel Injector 5 Control Circuit Malfunction

Possible Causes:



Injector 5 power circuit (B+) is open (check the power fuse)
 
Injector 5 control circuit is open between injector and ECM
 
Injector 5 control circuit is grounded between injector and ECM
 
Injector 5 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0206



Fuel Injector 6 Control Circuit Malfunction

Possible Causes:



Injector 6 power circuit (B+) is open (check the power fuse)
 
Injector 6 control circuit is open between injector and ECM
 
Injector 6 control circuit is grounded between injector and ECM
 
Injector 6 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0207



Fuel Injector 7 Control Circuit Malfunction

Possible Causes:



Injector 7 power circuit (B+) is open (check the power fuse)
 
Injector 7 control circuit is open between injector and ECM
 
Injector 7 control circuit is grounded between injector and ECM
 
Injector 7 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0208



Fuel Injector 8 Control Circuit Malfunction

Possible Causes:



Injector 8 power circuit (B+) is open (check the power fuse)
 
Injector 8 control circuit is open between injector and ECM
 
Injector 8 control circuit is grounded between injector and ECM
 
Injector 8 is damaged or it has failed
 
ECM is damaged
 

Trouble Code: P0218



Transmission Fluid Overtemperature

Possible Causes:



The transmission fluid temperature is 136°C (277°F) or greater for 60 seconds.
 

Trouble Code: P0218



Transmission Fluid Overtemperature

Possible Causes:



The TFT is greater than 132°C (270°F) for 1 minute.
 

Trouble Code: P0220



Throttle Position (TP) Sensor 2 Circuit

Possible Causes:



P0220
 
The TP sensor 2 voltage is less than 0.25 V or greater than 4.59 V for greater than 1 s.
 

Trouble Code: P0221



Throttle Position (TP) Sensor 2 Circuit Low Voltage

Possible Causes:



TP sensor low reference circuit for an open/high resistance
 
TP sensor 5-volt reference circuit for a short to ground or an open/high resistance
 
TP sensor 5-volt reference circuit for a short to voltage
 
TP sensor signal circuit for a short to voltage
 
TP sensor signal circuit for a short to ground or an open/high resistance
 
TP sensor has failed (replace throttle body)
 
ECM has failed
 

Trouble Code: P0222



Throttle Position (TP) Sensor 2 Circuit Low Voltage

Possible Causes:



TP Sensor 2 signal circuit is open or shorted to ground
 
TP Sensor 2 VREF (5v) circuit is open, or TP Sensor 2 ground circuit is open
 
TP Sensor 2 is damaged or has failed (replace the throttle body assembly)
 
ECM is damaged
 

Trouble Code: P0223



Throttle Position (TP) Sensor 2 Circuit High Voltage

Possible Causes:



TP Sensor 2 signal circuit is open or shorted to ground
 
TP Sensor 2 VREF (5v) circuit is open, or TP Sensor 2 ground circuit is open
 
TP Sensor 2 is damaged or has failed (replace the throttle body assembly)
 
ECM is damaged
 

Trouble Code: P0231



Fuel Pump Control Circuit High Voltage

Possible Causes:



ECM fuel pump output control circuit for a short to voltage.
 
ECM fuel pump output control circuit for a short to ground or an open/high resistance
 
FECM control circuit terminal 2 for a short to voltage or an open/high resistance
 
Faulty FECM
 
Faulty fuel tank fuel pump module
 

Trouble Code: P0232



Fuel Pump Control Circuit

Possible Causes:



ECM fuel pump output control circuit for a short to voltage.
 
ECM fuel pump output control circuit for a short to ground or an open/high resistance
 
FECM control circuit terminal 2 for a short to voltage or an open/high resistance
 
Faulty FECM
 
Faulty fuel tank fuel pump module
 

Trouble Code: P0234



Turbocharger Engine Overboost

Possible Causes:



The ECM detects that the measured boost pressure is greater than 39 kPa above the expected range for 10 seconds.
 

Trouble Code: P023F



Fuel Pump Control Circuit

Possible Causes:



The FPCM detects a fault on the fuel pump voltage circuit that is above or below a predetermined voltage threshold.
 

Trouble Code: P0261



Injector 1 Control Circuit High Voltage

Possible Causes:



High voltage control circuit shorted to voltage
 
High voltage control circuit short to ground or an open/high resistance
 
Low voltage control circuit shorted to voltage
 
Low voltage control circuit short to ground or an open/high resistance
 
Faulty fuel injector
 
ECM has failed.
 

Trouble Code: P0262



Injector 2 Control Circuit Low Voltage

Possible Causes:



High voltage control circuit shorted to voltage
 
High voltage control circuit short to ground or an open/high resistance
 
Low voltage control circuit shorted to voltage
 
Low voltage control circuit short to ground or an open/high resistance
 
Faulty fuel injector
 
ECM has failed.
 

Trouble Code: P0264



Injector 2 Control Circuit High Voltage

Possible Causes:



High voltage control circuit shorted to voltage
 
High voltage control circuit short to ground or an open/high resistance
 
Low voltage control circuit shorted to voltage
 
Low voltage control circuit short to ground or an open/high resistance
 
Faulty fuel injector
 
ECM has failed.
 

Trouble Code: P0265



Injector 3 Control Circuit Low Voltage

Possible Causes:



High voltage control circuit shorted to voltage
 
High voltage control circuit short to ground or an open/high resistance
 
Low voltage control circuit shorted to voltage
 
Low voltage control circuit short to ground or an open/high resistance
 
Faulty fuel injector
 
ECM has failed.
 

Trouble Code: P0268



Injector 4 Control Circuit Low Voltage

Possible Causes:



High voltage control circuit shorted to voltage
 
High voltage control circuit short to ground or an open/high resistance
 
Low voltage control circuit shorted to voltage
 
Low voltage control circuit short to ground or an open/high resistance
 
Faulty fuel injector
 
ECM has failed.
 

Trouble Code: P0270



Injector 4 Control Circuit High Voltage

Possible Causes:



High voltage control circuit shorted to voltage
 
High voltage control circuit short to ground or an open/high resistance
 
Low voltage control circuit shorted to voltage
 
Low voltage control circuit short to ground or an open/high resistance
 
Faulty fuel injector
 
ECM has failed.
 

Trouble Code: P0271



Injector 5 Control Circuit Low Voltage

Possible Causes:



High voltage control circuit shorted to voltage
 
High voltage control circuit short to ground or an open/high resistance
 
Low voltage control circuit shorted to voltage
 
Low voltage control circuit short to ground or an open/high resistance
 
Faulty fuel injector
 
ECM has failed.
 

Trouble Code: P0273



Injector 5 Control Circuit High Voltage

Possible Causes:



High voltage control circuit shorted to voltage
 
High voltage control circuit short to ground or an open/high resistance
 
Low voltage control circuit shorted to voltage
 
Low voltage control circuit short to ground or an open/high resistance
 
Faulty fuel injector
 
ECM has failed.
 

Trouble Code: P0274



Injector 6 Control Circuit Low Voltage

Possible Causes:



High voltage control circuit shorted to voltage
 
High voltage control circuit short to ground or an open/high resistance
 
Low voltage control circuit shorted to voltage
 
Low voltage control circuit short to ground or an open/high resistance
 
Faulty fuel injector
 
ECM has failed.
 

Trouble Code: P0276



Injector 6 Control Circuit High Voltage

Possible Causes:



High voltage control circuit shorted to voltage
 
High voltage control circuit short to ground or an open/high resistance
 
Low voltage control circuit shorted to voltage
 
Low voltage control circuit short to ground or an open/high resistance
 
Faulty fuel injector
 
ECM has failed.
 

Trouble Code: P0277



Injector 1 Leak

Possible Causes:



Test or replace the appropriate fuel injector
 

Trouble Code: P0299



Turbocharger Engine Underboost

Possible Causes:



The measured MAP pressure is more than 39 kPa below the expected range for 10 seconds.
 

Trouble Code: P029D



Injector 2 Leak

Possible Causes:



Test or replace the appropriate fuel injector
 

Trouble Code: P02A1



Injector 2 Leak

Possible Causes:



The fuel balancing rate for a cylinder is less than -7.0 mm-;.
 

Trouble Code: P02A5



Injector 3 Leak

Possible Causes:



Test or replace the appropriate fuel injector
 

Trouble Code: P02A9



Injector 4 Leak

Possible Causes:



Test or replace the appropriate fuel injector
 

Trouble Code: P02AD



Injector 6 Leak

Possible Causes:



Test or replace the appropriate fuel injector
 

Trouble Code: P02B1



Multiple Engine Misfire Detected

Possible Causes:



Base engine mechanical fault that affects one or more cylinders
 
Fuel metering fault (high fuel pressure or fuel contaminated)
 
EVAP system problem or the EVAP canister is fuel saturated
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Ignition system fault (a coil) that affects more than one cylinder
 
MAF sensor contamination (it can cause a very lean condition)
 

Trouble Code: P02B5



Injector 7 Leak

Possible Causes:



The fuel balancing rate for a cylinder is less than -7.0 mm-;.
 

Trouble Code: P02B9



Injector 8 Leak

Possible Causes:



The fuel balancing rate for a cylinder is less than -7.0 mm-;.
 

Trouble Code: P02E0



Diesel Intake Air (IA) Flow Control Circuit

Possible Causes:



The IA valve duty cycle is greater than 10 percent.
 
The IA valve control circuit is less than 25 mA.
 

 
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