Silverado 2008

4.8L V8 VIN C Auto 24

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Trouble Code: P2764



Torque Converter Clutch (TCC) Pressure Control (PC) Solenoid Control Circuit Low Voltage

Possible Causes:



P2764
 
The TCM detects an open in the TCC PWM solenoid valve circuit when the TCC PWM is commanded ON.
 
The TCM detects a short to ground in the TCC PWM solenoid valve circuit when the TCC PWM is commanded ON.
 

Trouble Code: P2769



Torque Converter Clutch (TCC) Enable Solenoid Control Circuit Low Voltage

Possible Causes:



P2769
 
The following conditions occurs for 5 seconds:
 
The TCM detects an open in the TCC solenoid valve circuit when the TCC is commanded ON.
 
The TCM detects a short to ground in the TCC shift solenoid valve circuit when the TCC is commanded ON.
 

Trouble Code: P2770



Torque Converter Clutch (TCC) Enable Solenoid Control Circuit High Voltage

Possible Causes:



P2770
 
The TCM commands the solenoid ON and the voltage feedback remains high, B+.
 

Trouble Code: P2771



Four Wheel Drive (4WD) Low Switch Circuit

Possible Causes:



Condition 1
 
The 4WD low switch is not in 4WD low, open/12 volts.
 
The Transfer Case Ratio is 2.64-2.9 for 2 seconds.
 
Both conditions must be met twice.
 
Condition 2
 
The 4WD low switch is in 4WD low.
 
The Transfer Case Ratio is 0.8-1.75 for 2 seconds.
 

Trouble Code: P2A01



HO2S Performance Bank 1 Sensor 2

Possible Causes:



P2A01
 
The ECM detects that the sensor did not transition below 200 mV and above 730 mV during the passive test.
 
One of the following tests fail:
 
The Lean Intrusive Test detects that the sensor is more than 200 mV for 12 seconds.
 
The Rich Intrusive Test detects that the sensor is less than 730 mV for 12 seconds.
 
DTC P2A01 sets within 5 minutes when the above conditions are met.
 

Trouble Code: P2A04



HO2S Performance Bank 2 Sensor 2

Possible Causes:



P0153
 
The ECM detects that the HO2S 1 rich-to-lean or lean-to-rich average response time is more than a calibrated value.
 
DTC P0133 sets within 100 seconds when the above condition is met.
 
P0154
 
The ECM detects that the HO2S 1 parameter is between 350-550 mV for 100 seconds.
 
The Throttle Position (TP) Indicated Angle parameter changes more than 5 percent, 1 time.
 
DTC P0154 sets within 100 seconds when the above conditions are met.
 
P0160
 
The ECM detects that the HO2S 1 parameter is between 410-490 mV.
 
The TP Indicated Angle parameter changes more than 5 percent 1 time.
 
DTC P0160 sets within 100 seconds when the above conditions are met.
 
P1153
 
The ECM detects that the HO2S 1 rich-to-lean counts, or the lean-to-rich counts are less than a calibrated value.
 
DTC P1153 sets within 100 seconds when the above condition is met.
 
P2272
 
The ECM detects that the affected sensor is below 730 mV.
 
DTC P2272 sets within 1 second when the above condition is met.
 
'
 
P2A04
 
The ECM detects that the HO2S 1 did not transition below 200 mV and above 730 mV during the passive test.
 
One of the following tests fail:
 
The Lean Intrusive Test detects that the sensor is more than 200 mV for 12 seconds.
 
The Rich Intrusive Test detects that the sensor is less than 730 mV for 12 seconds.
 
DTC P2A04 sets within 10 minutes when the above conditions are met.
 

Trouble Code: P3400



Cylinder Deactivation System Performance

Possible Causes:



The ECM detects that the actual measured values from the MAF sensor, MAP sensor, and throttle position sensor, are not within the range of the calculated values for V4 mode.
 

Trouble Code: P3401



Cylinder 1 Deactivation Solenoid Control Circuit

Possible Causes:



The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 s.
 

Trouble Code: P3425



Cylinder 4 Deactivation Solenoid Control Circuit

Possible Causes:



The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 s.
 

Trouble Code: P3441



Cylinder 6 Deactivation Solenoid Control Circuit

Possible Causes:



The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 s.
 

Trouble Code: P3449



Cylinder 7 Deactivation Solenoid Control Circuit

Possible Causes:



The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 s.
 

Trouble Code: U0020



Low Speed CAN Communication Bus Performance

Possible Causes:



Control modules the vehicle is equipped with
 
Control modules B+, ignition, ground, communication enable and serial data circuit terminals
 
Control module locations on the low and high speed GMLAN serial data circuits
 

Trouble Code: U0020 00



Low Speed CAN Communication Bus Performance

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0073



Control Module Communication Bus Off

Possible Causes:



Control modules the vehicle is equipped with
 
Control module locations on the low speed GMLAN serial data circuit
 
Each control module's low speed GMLAN serial data circuit terminals
 
Control modules the vehicle is equipped with
 
High speed GMLAN serial data circuit terminating resistors
 
Control module locations on the high speed GMLAN serial data circuits
 
Each control module's high speed GMLAN serial data circuit terminals
 

Trouble Code: U0073 00



Control Module Communication Bus Off

Possible Causes:



The control module setting the DTC has attempted to establish communications on the serial data circuits more than 3 times in 5 seconds.
 

Trouble Code: U0073 71



ECU HS Bus Off

Possible Causes:



The control module setting the DTC has attempted to establish communications on the serial data circuits more than 3 times in 5 seconds.
 

Trouble Code: U0073 72



ECU LS Bus Off

Possible Causes:



The control module setting the DTC has attempted to establish communications on the serial data circuits more than 3 times in 5 seconds.
 

Trouble Code: U0100 00



Lost Communication With ECM/PCM

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0100 75



Lost Communication With ECM/PCM

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0100 7F



Lost Communication With ECM/PCM

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0101 00



Lost Communication With TCM

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0102 00



Lost Communication With Transfer Case Control Module

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0104 00



Lost Communication With Cruise Control Module

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0104 7F



Lost Communication With Cruise Control Module

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0106 00



Lost Communication With Glow Plug Control Module

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0109 00



Lost Communication With Fuel Pump Control Module

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0117 00



Lost Communication With Electrical PTO Control Module

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0121 00



Lost Communication With Anti-Lock Brake System (ABS) Control Module

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0122 00



Lost Communication With Vehicle Dynamics Control Module (ESCM)

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0126 00



Lost Communication With Steering Angle Sensor

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0131 00



Lost Communication With Power Steering Control Module

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0132 00



Lost Communication With Ride Level Control Module

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0134 00



Lost Communication With Power Steering Control Module - Rear

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0136 00



Lost Communication With Differential Control Module - Rear

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0137 00



Lost Communication With Trailer Brake Control Module

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0140 00



Lost Communication With Body Control Module

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0141 00



Lost Communication With Body Control Module A

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0151 00



Lost Communication With Restraints Control Module

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0151 71



Lost Communication With Restraints Control Module Invalid Serial Data Received

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

Trouble Code: U0151 7F



Lost Communication With Restraints Control Module Erratic

Possible Causes:



A supervised periodic message that includes the transmitter module availability has not been received.
 

 
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