CTS 2003-2005

3.2L V6 VIN N Auto 5

Print

Trouble Code: P0757



A/T 2-3 Shift Solenoid - No 3rd Or 4th Gear (5L40-E)

Possible Causes:



2-3 shift solenoid is mechanically stuck "on"
 
2-3 shift solenoid valve O-ring worn or damaged
 
2-3 shift valve is stuck in the released position, or the solenoid is damaged or has failed
 

Trouble Code: P0761



A/T 4-5 Shift Solenoid - No 4th Or 5th Gear (5L40-E)

Possible Causes:



4-5 shift solenoid is mechanically stuck "off"
 
4-5 shift solenoid valve O-ring worn or damaged
 
4-5 shift valve is stuck in the applied position
 
4-5 shift solenoid is damaged or it has failed
 

Trouble Code: P0762



A/T 4-5 Shift Solenoid - No 4th Or 5th Gear (5L40-E)

Possible Causes:



4-5 shift solenoid is mechanically stuck "on"
 
4-5 shift solenoid valve O-ring worn or damaged
 
4-5 shift valve is stuck in the released position
 
4-5 shift solenoid is damaged or it has failed
 

Trouble Code: P0850



Title: Manual Shift Position Switch Circuit Malfunction (5L40-E)

Possible Causes:



Manual shift position switch connector is damaged or shorted
 
PNP switch signal circuit is open or shorted to ground
 
Manual shift position switch is damaged or it has failed
 
PCM has failed
 

Trouble Code: P1172



Secondary Or Primary Fuel Level Sensor Malfunction

Possible Causes:



Fuel level sending unit circuit has high resistance condition
 
Primary or Secondary fuel tank module is damaged or failed
 
PCM has failed
 

Trouble Code: P1336



CKP Sensor System Variation Not Learned

Possible Causes:



Set the parking brake and block the drive wheels for safety.
 
Verify the hood is closed.
 
Read the trouble codes. If a code is set, refer to that code.
 
Start the engine. Allow engine temperature to reach at least 158ºF (70ºC). Then key off.
 
Select Crankshaft Position Variation Learn procedure on Scan Tool & start the vehicle.
 
Apply the brake pedal firmly and verify the selector is in Park.
 
Increase accelerator pedal position until fuel cutoff is reached at the test rpm (e.g., 5150). Quickly release the accelerator pedal after fuel cutoff is reached. The CKP system variation compensating values are learned when the engine speed (rpm) decreases back to idle speed and the procedure terminates.
 
Read the trouble codes and recheck for DTC P1336.
 
If DTC P1336 runs and passes, the CKP system variation "learn" procedure is complete. If not, look for other codes. If no codes are set, repeat the test procedure.
 

Trouble Code: P1551



Secondary Or Primary Fuel Level Sensor Malfunction

Possible Causes:



TAC motor circuit (one or more) shorted to ground
 
Throttle valves not in a "rest' position due to stuck open/closed
 
Throttle valves moving open or closed without spring pressure
 
Throttle body assembly is damaged or it has failed
 
PCM has failed
 

Trouble Code: P1780



Engine Torque Signal Circuit Malfunction

Possible Causes:



Perform the Diagnostic System Check for the Engine Controls
 
TCM needs to be replaced
 

Trouble Code: P1791



Accelerator Pedal Position Information Not Received

Possible Causes:



Perform the Diagnostic System Check for the Engine Controls
 
TCM may need to be replaced to repair this trouble code
 

Trouble Code: P1792



Engine Coolant Temperature Invalid Data Received

Possible Causes:



Perform the Diagnostic System Check for the Engine Controls
 
TCM may need to be replaced to repair this trouble code
 

Trouble Code: P1793



Wheel Speed Sensor Invalid Data Received

Possible Causes:



Perform the Diagnostic System Check for the Engine Controls
 
TCM may need to be replaced to repair this trouble code
 

Trouble Code: P1795



Throttle Plate Position Invalid Data Received

Possible Causes:



Perform the Diagnostic System Check for the Engine Controls
 
TCM may need to be replaced to repair this trouble code
 

Trouble Code: P1815



A/T Manual Shaft Shift Switch Circuit Malfunction (5L40-E)

Possible Causes:



Manual shaft shift switch connector is open or shorted
 
Manual shaft shift switch circuit is open or signals are shorted
 
Manual shaft shift switch is damaged or out of adjustment
 
TCM has failed
 

Trouble Code: P1818



A/T Manual Shaft Shift Switch Circuit Malfunction (5L40-E)

Possible Causes:



Manual shaft shift switch connector is open or shorted
 
Manual shaft shift switch circuit is open or signals are shorted
 
Manual shaft shift switch is damaged or out of adjustment
 
TCM has failed
 

Trouble Code: P1820



A/T Manual Shaft Shift Switch Circuit Malfunction (5L40-E)

Possible Causes:



Manual shaft shift switch connector is open or shorted
 
Manual shaft shift switch circuit is open or signals are shorted
 
Manual shaft shift switch is damaged or out of adjustment
 
TCM has failed
 

Trouble Code: P1822



A/T Manual Shaft Shift Switch Circuit Malfunction (5L40-E)

Possible Causes:



Manual shaft shift switch connector is open or shorted
 
Manual shaft shift switch circuit is open or signals are shorted
 
Manual shaft shift switch is damaged or out of adjustment
 
TCM has failed
 

Trouble Code: P1823



A/T Manual Shaft Shift Switch Circuit Malfunction (5L40-E)

Possible Causes:



Manual shaft shift switch connector is open or shorted
 
Manual shaft shift switch circuit is open or signals are shorted
 
Manual shaft shift switch is damaged or out of adjustment
 
TCM has failed
 

Trouble Code: P1825



A/T Manual Shaft Shift Switch Invalid Signal (5L40-E)

Possible Causes:



Manual shaft shift switch circuit is open or signals are shorted
 
Manual shaft shift switch is damaged or out of adjustment
 
TCM has failed
 

Trouble Code: P1826



A/T Manual Shaft Shift Switch Invalid Signal (5L40-E)

Possible Causes:



Manual shaft shift switch circuit is open or signals are shorted
 
Manual shaft shift switch is damaged or out of adjustment
 
TCM has failed
 

Trouble Code: P1831



Pressure Control Solenoid Circuit Low Input (5L40-E)

Possible Causes:



Pressure control solenoid control circuit is shorted to ground
 
Pressure control solenoid is damaged or it has failed
 
Transmission internal harness assembly may be shorted, or the TCM has failed
 

Trouble Code: P1832



Pressure Control Solenoid Circuit High Input (5L40-E)

Possible Causes:



Pressure control solenoid control circuit is shorted to power
 
Pressure control solenoid is damaged or it has failed
 
Transmission internal harness assembly may be shorted
 
TCM has failed
 

Trouble Code: P1833



Pressure Control Solenoid Circuit Low Input (5L40-E)

Possible Causes:



Pressure control solenoid control circuit is shorted to ground
 
Pressure control solenoid is damaged or it has failed
 
Transmission internal harness assembly may be shorted
 
TCM has failed
 

Trouble Code: P1834



Pressure Control Solenoid Circuit High Input (5L40-E)

Possible Causes:



Pressure control solenoid control circuit is shorted to power
 
Pressure control solenoid is damaged or it has failed
 
Transmission internal harness assembly may be shorted
 
TCM has failed
 

Trouble Code: P1842



1-2 Shift Solenoid Circuit Low Input (5L40-E)

Possible Causes:



A/T 1-2 shift solenoid control circuit open or shorted to ground
 
A/T 1-2 shift solenoid is damaged or has failed
 
Transmission internal harness assembly is open or shorted
 
TCM has failed
 

Trouble Code: P1843



1-2 Shift Solenoid Circuit High Input (5L40-E)

Possible Causes:



A/T 1-2 shift solenoid control circuit is shorted to power
 
A/T 1-2 shift solenoid is damaged or has failed
 
DTC U2100, U2104, U2105, U2106 can cause this code to set
 
Transmission internal harness assembly is shorted to power
 
TCM has failed
 

Trouble Code: P1845



A/T 2-3 Shift Solenoid Circuit Malfunction (5L40-E)

Possible Causes:



A/T 2-3 shift solenoid control circuit open or shorted to ground
 
A/T 2-3 shift solenoid is damaged or has failed
 
Transmission internal harness assembly open or shorted
 
TCM has failed
 

Trouble Code: P1847



A/T 2-3 Shift Solenoid Circuit Malfunction (5L40-E)

Possible Causes:



A/T 2-3 shift solenoid control circuit is shorted to power
 
A/T 2-3 shift solenoid is damaged or has failed
 
Transmission internal harness assembly is shorted to power, or the TCM has failed
 

Trouble Code: P1864



A/T 4-5 Shift Solenoid Circuit Malfunction (5L40-E)

Possible Causes:



A/T 4-5 shift solenoid control circuit open or shorted to ground
 
A/T 4-5 shift solenoid is damaged or has failed
 
Transmission internal harness assembly open or shorted
 
TCM has failed
 

Trouble Code: P1865



A/T 4-5 Shift Solenoid Circuit Malfunction (5L40-E) Code

Possible Causes:



A/T 4-5 shift solenoid control circuit is shorted to power
 
A/T 4-5 shift solenoid is damaged or has failed
 
Transmission internal harness assembly is shorted to power
 
TCM has failed
 

Trouble Code: P1867



A/T TCC Solenoid PWM Circuit High Input (5L40-E)

Possible Causes:



TCC PWM solenoid control circuit is open or shorted to ground
 
TCC PWM solenoid is damaged, or the TCM has failed
 
Transmission internal harness assembly is open or shorted
 

Trouble Code: P1868



A/T TCC Solenoid PWM Circuit High Input (5L40-E)

Possible Causes:



Replace the transmission fluid and filter
 
Change Transmission Fluid appear Driver Information Center
 
Reset the Oil Life Monitor after the fluid and filter are changed
 

Trouble Code: P2008



IMRC Solenoid Control Circuit Malfunction

Possible Causes:



IMRC solenoid control connector is damaged, open or shorted
 
IMRC solenoid control circuit is open or shorted to ground
 
IMRC solenoid power circuit is open (check the Manifold fuse)
 
IMRC solenoid is damaged or it has failed
 
PCM has failed
 

Trouble Code: P2009



IMRC Solenoid Control Circuit Low Input

Possible Causes:



IMRC solenoid control circuit is open or shorted to ground
 
IMRC solenoid power circuit is open (check the Manifold fuse)
 
IMRC solenoid is damaged or it has failed
 
PCM has failed
 

Trouble Code: P2096



HO2S Fuel Trim Bias Commanded Lean (Bank 1)

Possible Causes:



HO2S is contaminated or deteriorated due to poor fuel usage
 
Compare the activity of the Bank 1 HO2S-11 and HO2S-12 to a known good bank using the live plot feature of the Scan Tool. Drive the vehicle under various engine load and vehicle speed conditions. Look for any indication of improper operation (due to contamination) of the Bank 1 HO2S-11 or HO2S-12 sensors.
 

Trouble Code: P2097



HO2S Fuel Trim Bias Commanded Rich (Bank 1)

Possible Causes:



HO2S is contaminated or deteriorated due to poor fuel usage
 
Compare the activity of the Bank 1 HO2S-11 and HO2S-12 to a known good bank using the live plot feature of the Scan Tool. Drive the vehicle under various engine load and vehicle speed conditions. Look for an indication of improper operation (due to contamination) of the Bank 1 HO2S-11 or HO2S-12 (sensors).
 

Trouble Code: P2098



HO2S Fuel Trim Bias Commanded Lean (Bank 2)

Possible Causes:



HO2S is contaminated or deteriorated due to poor fuel usage
 
Compare the activity of the Bank 2 HO2S-21 and HO2S-22 to a known good bank using the live plot feature of the Scan Tool. Drive the vehicle under various engine load and vehicle speed conditions. Look for an indication of improper operation (due to contamination) of the Bank 2 HO2S-21 or HO2S-22 (sensors).
 

Trouble Code: P2099



HO2S Fuel Trim Bias Commanded Rich (Bank 2)

Possible Causes:



HO2S is contaminated or deteriorated due to poor fuel usage
 
Compare the activity of the Bank 2 HO2S-21 and HO2S-22 to a known good bank using the live plot feature of the Scan Tool. Drive the vehicle under various engine load and vehicle speed conditions. Look for an indication of improper operation (due to contamination) of the Bank 2 HO2S-21 or HO2S-22 (sensors).
 

Trouble Code: P2100



Throttle Air Control Motor Position Too High

Possible Causes:



TAC motor control circuit (one or more) is shorted to ground, or shorted to power (B+)
 
Throttle body connector is damaged, open or shorted
 
Throttle valves are not in the "rest" position
 
Throttle valves are binding open or binding closed
 
Throttle valves moving open or closed without spring pressure
 
Throttle body assembly is damaged or it has failed
 
PCM has failed
 

Trouble Code: P2101



Throttle Air Control Motor Position Too Low

Possible Causes:



TAC motor control circuit (one or more) is open, shorted to ground or to power (B+)
 
Throttle body connector is damaged, open or shorted
 
Throttle body assembly is damaged or it has failed
 
PCM has failed
 

Trouble Code: P2105



Throttle Air Control System Malfunction

Possible Causes:



Clear the trouble codes, and if this same code resets, the PCM has failed and must be replaced to repair this trouble code.
 

 
label.common.footer.alt.autozoneLogo