Silverado 2008

6.0L V8 VIN Y Auto 19

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Trouble Code: P1761



Up Down Shift Switch Signal Circuit

Possible Causes:



The TCM detects 5 error counts out of 10 samples within 10 seconds.
 

Trouble Code: P1762



Transmission Mode Switch Signal Circuit

Possible Causes:



The TCM detects an error in the rolling count value that does not match with the BCM.
 

Trouble Code: P1762



Transmission Mode Switch Signal Circuit

Possible Causes:



The TCM detects 5 error counts out of 10 samples within 10 seconds.
 

Trouble Code: P1779



Engine Torque Delivered to Transmission Control Module (TCM) Signal

Possible Causes:



DTC P1779 sets if managed engine torque, net, signal is less than 1.5 percent or greater than 98.5 percent for greater than 2 seconds.
 

Trouble Code: P1810



Transmission Fluid Pressure (TFP) Position Switch Circuit

Possible Causes:



P1810
 
The TCM detects an invalid TFP manual valve position switch state for 60 seconds.
 

Trouble Code: P1815



Transmission Fluid Pressure (TFP) Valve Position Switch - Start in Wrong Range

Possible Causes:



P1815
 
The TCM detects D2 only, TFP manual valve position switch state during and after engine start for 3.25 seconds.
 

Trouble Code: P1816



Transmission Fluid Pressure (TFP) Valve Position Switch Indicates Park/Neutral (P/N) with Drive Ratio

Possible Causes:



P1816
 
The TCM detects one of the following conditions for 6 seconds.
 
PARK/NEUTRAL indicated with a 1st gear ratio.
 
PARK/NEUTRAL indicated with a 2nd gear ratio.
 
PARK/NEUTRAL indicated with a 3rd gear ratio.
 
PARK/NEUTRAL indicated with a 4th gear ratio.
 

Trouble Code: P1818



Transmission Fluid Pressure (TFP) Valve Position Switch Indicates Drive without Drive Ratio

Possible Causes:



P1818
 
The TCM detects the following condition for 5 seconds.
 
PARK/NEUTRAL or FORWARD range indicated with a reverse gear ratio.
 

Trouble Code: P1825



Internal Mode Switch - Invalid Range

Possible Causes:



P1825
 
Any one of the following Fail Cases occur:
 

Trouble Code: P1831



Pressure Control (PC)/Shift Lock Solenoid Control Circuit Low Voltage

Possible Causes:



P1831
 
The TCM detects an internal open or short to ground in the high side driver 1 for 3 out of 5 seconds.
 

Trouble Code: P1832



Pressure Control (PC)/Shift Lock Solenoid Control Circuit High Voltage

Possible Causes:



P1832
 
The TCM detects an internal short to voltage on the high side driver 1 circuit for 3 out of 5 seconds.
 

Trouble Code: P2002



Diesel Particulate Filter Efficiency

Possible Causes:



The ECM detects that the particulate filter has degraded below a calibrated threshold for greater than 30 seconds.
 

Trouble Code: P2032



Exhaust Temperature Sensor 2 (EGT-2) Circuit Low Voltage

Possible Causes:



P2032
 
The ECM detects that the EGT sensor 2 is less than 0.32 V for greater than 1 s.
 

Trouble Code: P2033



Exhaust Temperature Sensor 2 (EGT-2) Circuit High Voltage

Possible Causes:



P2033
 
The ECM detects that the EGT sensor 2 is greater than 3.37 V for greater than 1 s.
 

Trouble Code: P20E2



Exhaust Temperature Sensor 1-2 Correlation

Possible Causes:



The ECM detects at initial power-up, a temperature difference of greater than 20°C (36°F), exists between exhaust gas temperature sensors 1 and 2.
 
This DTC runs once per key cycle when the above condition is met.
 

Trouble Code: P2101



Throttle Actuator Position Performance

Possible Causes:



P2101
 
The indicated throttle position does not match the predicted throttle position for greater than 0.3 s.
 

Trouble Code: P2101



Throttle Actuator Position Performance

Possible Causes:



P2101
 
The actual throttle position does not match the predicted throttle position for greater than 1 s.
 

Trouble Code: P2119



Throttle Closed Position Performance

Possible Causes:



P2119
 
The ECM determines that the throttle valve did not return to the rest position within 0.720 s.
 

Trouble Code: P2119



Throttle Closed Position Performance

Possible Causes:



P2119
 
The ECM detects that the throttle blade did not return to the default position when the TAC motor is de-energized for greater than 1 s.
 

Trouble Code: P2120



Accelerator Pedal Position (APP) Sensor 1 Circuit

Possible Causes:



P2120
 
The APP sensor 1 voltage is less than 0.46 V or greater than 4.7 V for greater than 0.2 s.
 

Trouble Code: P2122



Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

Possible Causes:



P2122
 
The ECM detects that the APP sensor 1 voltage is less than 0.46 V for greater than 0.2 s.
 

Trouble Code: P2122



Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

Possible Causes:



P2122
 
The ECM detects that the APP sensor 1 voltage is less than 0.8 V for greater than 0.2 second.
 

Trouble Code: P2123



Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

Possible Causes:



P2123
 
The ECM detects that the APP sensor 1 voltage is greater than 4.75 V for greater than 0.2 s.
 

Trouble Code: P2123



Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

Possible Causes:



P2123
 
The ECM detects that the APP sensor 1 voltage is more than 4.75 V for more than 0.2 second.
 

Trouble Code: P2125



Accelerator Pedal Position (APP) Sensor 2 Circuit

Possible Causes:



P2125
 
The APP sensor 2 voltage is less than 0.32 V or greater than 2.6 V for greater than 0.2 s.
 

Trouble Code: P2127



Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

Possible Causes:



P2127
 
The ECM detects that the APP sensor 2 voltage is less than 0.32 V for greater than 0.2 s.
 

Trouble Code: P2127



Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

Possible Causes:



P2127
 
The ECM detects that the APP sensor 2 voltage is less than 0.3 V for more than 0.2 second.
 

Trouble Code: P2128



Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

Possible Causes:



P2128
 
The ECM detects that the APP sensor 2 voltage is greater than 2.6 V for greater than 0.2 s.
 

Trouble Code: P2128



Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

Possible Causes:



P2128
 
The ECM detects that the APP sensor 2 voltage is more than 2.5 V for more than 0.2 second.
 

Trouble Code: P2135



Throttle Position (TP) Sensor 1-2 Correlation

Possible Causes:



P2135
 
The difference between the TP sensor 1 and TP sensor 2 exceeds a predetermined value for greater than 2 s.
 

Trouble Code: P2138



Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Possible Causes:



P2138
 
The voltage difference between APP sensor 1 and APP sensor 2 exceeds a predetermined value for greater than 1 s.
 

Trouble Code: P2146



Injector Positive Voltage Control Circuit Group 1

Possible Causes:



The ECM injector output driver detects an incorrect current on a fuel injector circuit.
 
The above condition is present for 3 seconds for groups 1, 2, and 3.
 
The above condition is present for 5 seconds for group 4.
 

Trouble Code: P2149



Injector Positive Voltage Control Circuit Group 2

Possible Causes:



The ECM injector output driver detects an incorrect current on a fuel injector circuit.
 
The above condition is present for 3 seconds for groups 1, 2, and 3.
 
The above condition is present for 5 seconds for group 4.
 

Trouble Code: P2152



Injector Positive Voltage Control Circuit Group 3

Possible Causes:



The ECM injector output driver detects an incorrect current on a fuel injector circuit.
 
The above condition is present for 3 seconds for groups 1, 2, and 3.
 
The above condition is present for 5 seconds for group 4.
 

Trouble Code: P2155



Injector Positive Voltage Control Circuit Group 4

Possible Causes:



The ECM injector output driver detects an incorrect current on a fuel injector circuit.
 
The above condition is present for 3 seconds for groups 1, 2, and 3.
 
The above condition is present for 5 seconds for group 4.
 

Trouble Code: P2160



Vehicle Speed Sensor (VSS) 2 Circuit Low Voltage

Possible Causes:



P2160
 
The transfer case output shaft speed is 50 RPM or less for 4.5 seconds.
 

Trouble Code: P2160



Vehicle Speed Sensor (VSS) 2 Circuit Low Voltage

Possible Causes:



P2160
 
No speed signal from the transfer case speed sensor.
 
The transfer case output shaft speed is 50 RPM or less.
 

Trouble Code: P2161



Vehicle Speed Sensor (VSS) 2 Circuit Intermittent

Possible Causes:



P2161
 
The transfer case output shaft speed drops 1,200 RPM or greater for at least 3.25 seconds.
 

Trouble Code: P2161



Vehicle Speed Sensor (VSS) 2 Circuit Intermittent

Possible Causes:



P2161
 
Loss of speed signal from the transfer case speed sensor.
 
Output speed signal is increasing: current transfer case speed signal - last valid output speed greater than 475 RPM.
 
Output speed signal is decreasing: current transfer case speed signal - last valid output speed less than 255 RPM.
 

Trouble Code: P2176



Minimum Throttle Position Not Learned

Possible Causes:



P2176
 
The difference between the predicted and the actual throttle position is greater than a calibrated amount for greater than 2 s.
 

 
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