MonteCarlo 2000

3.8L V6 VIN K Auto 4

Print

Trouble Code: P1362



Ignition Bypass Circuit Low Voltage

Possible Causes:

Check for the following conditions:



Poor connection at the PCM -- Inspect harness connectors for the following conditions:

Backed out terminals
 
Improper mating
 
Broken locks
 
Improperly formed or damaged terminals
 
Poor terminal to wire connection
 

Damaged harness -- Inspect the wiring harness for damage. If the harness appears to be OK, disconnect the ICM, turn ON the ignition and observe a Digital Multimeter connected between the IC circuit and B+ while moving connectors and wiring harnesses related to the ICM. A change in voltage will indicate the location of the malfunction.
 

Trouble Code: P1374



IC Module 3X Reference Circuit Malfunction

Possible Causes:



IC 3X signal wire is routed to close to the Generator, spark plug wires or any other possible cause of EMI/RFI interference
 
IC 3X signal circuit is open, shorted to ground or shorted to B+
 
IC module is damaged or has failed
 
PCM has failed
 
TSB 99-06-04-45 contains a repair procedure for this code
 

Trouble Code: P1380



Misfire Detected, Rough Road Data Unusable

Possible Causes:



The presence of this code (P1380) indicates the ABS/TCS system detected a malfunction that would not allow the EBTCM to transmit the correct rough road data to the PCM
 
Refer to Diagnostic System Check for Antilock Brake System
 
Refer to Diagnostic System Check for the Engine Controls
 

Trouble Code: P1381



Misfire Detected - No Communication With The EBCM

Possible Causes:



Service the ABS before diagnosing a misfire because an actual engine misfire may or may not exist. Also, an actual engine misfire may have occurred during a period of ABS malfunction.
 
Determine if the vehicle was driven on a rough road, and the ABS could not detect this due to a malfunction. The PCM may interpret variations in crankshaft speed caused by the rough road as a misfire without an actual engine misfire present.
 
Refer to the Diagnostic System Check for ABS and the PCM
 

Trouble Code: P1404



EGR Valve Closed Position Signal Range/Performance

Possible Causes:



EGR sensor signal circuit is shorted to VREF
 
EGR sensor ground circuit is open or has high resistance
 
EGR sensor is damaged or has failed (sensor/solenoid unit)
 
EGR valve pintle or valve seat contains carbon deposits
 
PCM has failed
 

Trouble Code: P1441



EVAP System Flow During Non-Purge

Possible Causes:



EVAP purge valve, purge pipe, or the charcoal canister has a temporary blockage (this fault could cause an intermittent fault)
 
FTP sensor is out-of-calibration, damaged or it is skewed
 
EVAP purge solenoid valve is damaged or has failed
 
PCM has failed
 

Trouble Code: P1546



A/C Clutch Feedback Circuit Low Input

Possible Causes:



A/C clutch status line is open or shorted to ground
 
A/C clutch relay is damaged or has failed (contains not closing)
 
A/C clutch relay power circuit is open (test the HVAC fuse)
 
PCM has failed
 

Trouble Code: P1554



Cruise Control Status Circuit Malfunction

Possible Causes:



Cruise control inhibit circuit is open or shorted to ground
 
SMCC II cruise control module is damaged or has failed
 
PCM has failed
 

Trouble Code: P1571



Traction Control Torque Request Circuit Malfunction

Possible Causes:



T/C desired torque circuit is open or shorted to ground
 
T/C desired torque circuit is shorted to system power (B+)
 
EBTCM has failed
 
PCM has failed
 

Trouble Code: P1585



Cruise Control Inhibit Output Circuit Malfunction

Possible Causes:



Cruise control inhibit circuit is shorted to system voltage
 
Cruise control module power circuit is open (test CR CNT fuse)
 
Cruise control stepper motor power circuit is shorted to ground
 
Cruise control module is damaged or has failed
 
PCM has failed
 

Trouble Code: P1626



Theft Deterrent System Fuel Enable Circuit Malfunction

Possible Causes:



Perform the Onboard Diagnostic System Check
 
If the PCM needs replacing, it must be reprogrammed
 
TSB 02-08-56-002 contains a repair procedure for this code
 

Trouble Code: P1629



Theft Deterrent Signal Not Present, Engine Cranking

Possible Causes:



Perform the Onboard Diagnostic System Check
 
Refer to the diagnostics for the Theft Deterrent System
 
If the PCM needs replacing, it must be reprogrammed
 
TSB 02-08-56-002 contains a repair procedure for this code
 

Trouble Code: P1630



Theft Deterrent Learn Mode Active

Possible Causes:



Perform the Onboard Diagnostic System Check
 
Refer to the diagnostics for the Theft Deterrent System
 
If the PCM needs replacing, it must be reprogrammed
 

Trouble Code: P1631



Theft Deterrent Enable Signal Not Correct

Possible Causes:



This code indicates that the VTD password that the PCM has learned does not agree with the password being received from the theft deterrent system. This condition can occur if an incorrect key is being used when attempting to start the vehicle or if the Theft Deterrent Module has been replaced and the PCM password learn function has not been enabled.
 
Refer to Programming the Theft Deterrent System
 
Perform the Powertrain Onboard Diagnostic System Check
 

Trouble Code: P1635



5-Volt Reference 'A' Circuit Malfunction

Possible Causes:



5v VREF circuit is shorted to sensor ground or chassis ground
 
5v VREF circuit, MAP or FTP sensor circuit is shorted to (B+)
 
5v VREF circuit shorted to EGR sensor High signal circuit
 
EGR solenoid valve (and sensor) is damaged or has failed
 
PCM has failed
 

Trouble Code: P1639



5-Volt Reference 'B' Circuit Malfunction

Possible Causes:



A/C refrigerant pressure sensor VREF circuit is open, shorted to ground or shorted to system power
 
A/C refrigerant pressure sensor is damaged or PCM has failed
 
TSB 61-65-61 contains a repair procedure for this code
 

Trouble Code: P1689



Traction Control Delivered Torque Output Circuit

Possible Causes:

Check for the following conditions:



Poor connection at the PCM -- Inspect harness connectors for the following conditions:

Backed out terminals
 
Improper mating
 
Broken locks
 
Improperly formed or damaged terminals
 
Poor terminal to wire connection
 

Damaged harness -- Inspect the wiring harness for damage.If the harness appears to be OK, disconnect the PCM, turn ON the ignition and observe a Digital Multimeter connected between the Traction Control Delivered Torque control circuit and ground at the PCM harness connector while moving connectors and wiring harnesses related to the EBTCM. A change in voltage will indicate the location of the malfunction.
 

Trouble Code: P1810



Transmission Pressure Switch Manifold Circuit Malfunction

Possible Causes:



TFP valve position switch signal circuit is open or grounded
 
TFP valve position switch circuit shorted to another signal
 
TFP valve position switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1811



Maximum Adapt and Long Shift

Possible Causes:



Ask the customer about possible overloading, exceeding the trailer towing limit, or towing in overdrive.
 
Ensure that the PCM has the latest calibration update.
 

Trouble Code: P1814



Torque Converter Overstressed (3.8L Monte Carlo)

Possible Causes:



A simultaneous acceleration and application of the brakes may cause DTC P1814 to occur.
 

Trouble Code: P1819



Internal Mode Switch - No Start/Wrong Range (3.8L Monte Carlo)

Possible Causes:



Inspect the connectors at the controller, the component and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 
Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Wiring Systems.
 
Refer to the Transmission Internal Mode Switch Logic table for the normal range signals and the invalid combinations.
 

Trouble Code: P1820



Internal Mode Switch Circuit A Low (3.8L Monte Carlo)

Possible Causes:



Inspect the connectors at the controller, the component and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 
Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Wiring Systems.
 

Trouble Code: P1822



Internal Mode Switch Circuit B High (3.8L Monte Carlo)

Possible Causes:



Inspect the connectors at the controller, the component and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 
Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Wiring Systems.
 

Trouble Code: P1823



Internal Mode Switch Circuit P Low (3.8L Monte Carlo)

Possible Causes:



Inspect the connectors at the controller, the component and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 
Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Wiring Systems.
 

Trouble Code: P1825



Internal Mode Switch - Invalid Range (3.8L Monte Carlo)

Possible Causes:



Inspect the connectors at the controller, the component and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 
Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Wiring Systems.
 
Refer to the Transmission Internal Mode Switch Logic table for the normal range signals and the invalid combinations.
 

Trouble Code: P1826



Internal Mode Switch Circuit C High (3.8L Monte Carlo)

Possible Causes:



Inspect the connectors at the controller, the component and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 
Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Wiring Systems.
 

Trouble Code: P1860



TCC PWM Solenoid Circuit Electrical (3.8L Monte Carlo)

Possible Causes:



Inspect the connectors at the controller, the component and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 
Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Wiring Systems.
 
Ensure the wiring harness is not stretched too tightly or other components are pressing on the A/T inline 20-way connector body. Also inspect for proper clearance to any other components and wiring. Refer to Intermittent Conditions in Engine Controls - 3.4L or Intermittent Conditions in Engine Controls - 3.8L.
 

Trouble Code: P1887



TCC Release Switch Circuit (3.8L Monte Carlo)

Possible Causes:



Inspect the connectors at the controller, the component and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 
Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Wiring Systems.
 
Ensure the wiring harness is not stretched too tightly or other components are pressing on the A/T inline 20-way connector body. Also inspect for proper clearance to any other components and wiring. Refer to Intermittent Conditions in Engine Controls - 3.4L or Intermittent Conditions in Engine Controls - 3.8L.
 

Trouble Code: U1000



Class 2 Communication Malfunction

Possible Causes:



Class 2 circuit is open, shorted to ground or shorted to power
 
PCM ignition power circuit(s) has a high resistance condition
 
PCM main ground circuit(s) has a high resistance condition
 
SDM (module) could be shorted pulling the voltage low
 

Trouble Code: U1016



No Communication With Powertrain Control Module

Possible Causes:



PCM Class 2 circuit is open, shorted to ground or to B+
 
PCM ignition power circuit(s) has a high resistance condition
 
PCM main ground circuit(s) has a high resistance condition
 
PCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1048



No Communication With Rear Wheel Steering Control Module

Possible Causes:



RWSCM Class 2 circuit is open, shorted to ground or to B+
 
RWSCM ignition power circuit has a high resistance condition
 
RESCM main ground circuit(s) has a high resistance condition
 
RESCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1064



No Communication With Body Control Module

Possible Causes:



BCM Class 2 circuit is open, shorted to ground or to B+
 
BCM ignition power circuit has a high resistance condition
 
BCM main ground circuit(s) has a high resistance condition
 
BCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1088



No Communication With SDM (Restraint Module)

Possible Causes:



SDM Class 2 circuit is open, shorted to ground or to B+
 
SDM ignition power circuit has a high resistance condition
 
SDM main ground circuit(s) has a high resistance condition
 
SDM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1096



No Communication With Instrument Panel Cluster

Possible Causes:



IPC Class 2 circuit is open, shorted to ground or to B+
 
IPC ignition power circuit has a high resistance condition
 
IPC main ground circuit(s) has a high resistance condition
 
IPC (module) may have failed and is pulling the circuit low
 

Trouble Code: U1097



No Communication With Driver Information Center

Possible Causes:



DIC Class 2 circuit is open, shorted to ground or to B+
 
DIC ignition power circuit has a high resistance condition
 
DIC main ground circuit(s) has a high resistance condition
 
DIC (module) may have failed and is pulling the circuit low
 

Trouble Code: U1151



No Communication With Vehicle Interface Unit

Possible Causes:



VIU Class 2 circuit is open, shorted to ground or to B+
 
VIU ignition power circuit has a high resistance condition
 
VIU main ground circuit(s) has a high resistance condition
 
VIU (module) may have failed and is pulling the circuit low
 

Trouble Code: U1152



No Communication With HVAC Control Module

Possible Causes:



HVAC Class 2 circuit is open, shorted to ground or to B+
 
HVAC ignition power circuit has a high resistance condition
 
HVAC main ground circuit(s) has a high resistance condition
 
HVAC (module) may have failed and is pulling the circuit low
 

Trouble Code: U1255



Class 2 Communications Malfunction

Possible Causes:



Class 2 circuit is open, shorted to ground or shorted to power
 
PCM ignition power circuit(s) has a high resistance condition
 
PCM main ground circuit(s) has a high resistance condition
 

Trouble Code: U1300



Class 2 Data Link Low

Possible Causes:



This DTC cannot be retrieved with a current status. The diagnosis of U1300 is accomplished via the symptom, Scan Tool Does Not Communicate with a Class 2 Device. Refer to Scan Tool Does Not Communicate with Class 2 Device .
 
An intermittent condition is likely to be caused by a short to ground on the class 2 serial data circuit. Use the Scan Tool Does Not Communicate with a Class 2 Device procedure in order to isolate an intermittent condition. Refer to Scan Tool Does Not Communicate with Class 2 Device .
 

Trouble Code: U1301



Class 2 Data Link High

Possible Causes:



This DTC cannot be retrieved with a current status. The diagnosis of U1301 is accomplished via the symptom, Scan Tool Does Not Communicate with a Class 2 Device. Refer to Scan Tool Does Not Communicate with Class 2 Device .
 
An intermittent condition is likely to be caused by a short to voltage on the class 2 serial data circuit. Use the Scan Tool Does Not Communicate with a Class 2 Device procedure in order to isolate an intermittent condition. Refer to Scan Tool Does Not Communicate with Class 2 Device .
 

 
label.common.footer.alt.autozoneLogo