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Why do i get a u0073 or u0121?

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Anonymous

16y ago
Updated: 8/17/2019

u 0121 its lost communicatin with anti-lock brack module ( active ) ? change the transmission control module ana make learn

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16y ago

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What does u0101 lost communication with tcm mean?

DTC U0100-U0299 Circuit Description Modules connected to the high speed GMLAN serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. DTC Descriptors This diagnostic procedure supports the following DTCs: DTC U0100 Lost Communication With Engine Control Module (ECM) DTC U0101 Lost Communication With Transmission Control Module (TCM) DTC U0104 Lost Communication With Distance Sensing and Cruise Control (DSCC) Module DTC U0121 Lost Communication With Electronic Brake Control Module (EBCM) DTC U0141 Lost Communication With Instrument Panel Module (IPM) DTC U0181 Lost Communication With Dynamic Headlamp Leveling (DHL) Control Module This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description in Vehicle DTC Information. DTC Symptom DTC Symptom Descriptor 00 No Additional Information Conditions for Running the DTC Voltage supplied to the modules is in the normal operating voltage range. The vehicle power mode requires serial data communication to occur. The DTC U0001 does not have a current status. Conditions for Setting the DTC A supervised periodic message that includes the transmitter module availability has not been received. Action Taken When the DTC Sets The module uses a default value for the missing parameter. Conditions for Clearing the DTC A current DTC clears when the malfunction is no longer present. A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction. Diagnostic Aids A poor connection at the inoperative module may cause this code to set. An improperly powered module may cause this code to set. Step Action Yes No Schematic Reference: Data Link Connector (DLC) Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems 1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2 Go to Diagnostic System Check - Vehicle in Vehicle DTC Information 2 Did you record any DTC in the range of U2105-U2199? Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information Go to Step 3 3 Important Use the DTC list in DTC Descriptors to determine which module is not communicating. Test the following circuits of the module that is not communicating for an open or a short to ground: The battery positive voltage input circuits The battery positive voltage output circuits The ignition voltage input circuits The ignition voltage output circuits The switched battery positive voltage circuits Refer to the following: Control Module References for the applicable schematic Circuit Testing in Wiring Systems Wiring Repairs in Wiring Systems Did you find and correct the condition? Go to Step 8 Go to Step 4 4 Turn OFF the ignition. Test the ground circuits of the module that is not communicating for an open. If the module is the body control module (BCM), test its class 2 serial data circuit for an open, also. Refer to the following: Control Module References for the applicable schematic Circuit Testing in Wiring Systems Wiring Repairs in Wiring Systems Did you find and correct the condition? Go to Step 8 Go to Step 5 5 Test the high speed GMLAN serial data circuits of the module that is not communicating for an open. Refer to Circuit Testing and GMLAN Wiring Repairs in Wiring Systems. Did you find and correct the condition? Go to Step 8 Go to Step 6 6 Inspect the harness connectors of the module that is not communicating for poor connections and terminal tension at the following circuits: The battery positive voltage input circuits The battery positive voltage output circuits The ignition voltage input circuits The ignition voltage output circuits The switched battery positive voltage supply circuits The ground circuits The high speed GMLAN serial data circuits Refer to the following: Control Module References for the applicable schematic Testing for Intermittent Conditions and Poor Connections in Wiring Systems Connector Repairs in Wiring Systems Did you find and correct the condition? Go to Step 8 Go to Step 7 7 Replace the module that is not communicating. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? Go to Step 8 -- 8 Use the scan tool in order to clear the DTCs. Does the scan tool still display other current DTCs? Go to Diagnostic System Check - Vehicle in Vehicle DTC Information --


Diagnostic codes for 2006 PT Cruiser?

* P0016-CRANKSHAFT / CAMSHAFT TIMING MISALIGNMENT * P0031-O2 SENSOR 1/1 HEATER CIRCUIT LOW * P0032-O2 SENSOR 1/1 HEATER CIRCUIT HIGH * P0033-SURGE VALVE SOLENOID CIRCUIT * P0037-O2 SENSOR 1/2 HEATER CIRCUIT LOW * P0038-O2 SENSOR 1/2 HEATER CIRCUIT HIGH * P0068-MANIFOLD PRESSURE/THROTTLE POSITION CORRELATION * P0071-AMBIENT AIR TEMPERATURE SENSOR PERFORMANCE * P0072-AMBIENT AIR TEMPERATURE SENSOR CIRCUIT LOW * P0073-AMBIENT AIR TEMPERATURE SENSOR CIRCUIT HIGH * P0107-MANIFOLD ABSOLUTE PRESSURE SENSOR CIRCUIT LOW * P0108-MANIFOLD ABSOLUTE PRESSURE SENSOR CIRCUIT HIGH * P0111-INTAKE AIR TEMPERATURE SENSOR RATIONALITY * P0112-INTAKE AIR TEMPERATURE SENSOR CIRCUIT LOW * P0113-INTAKE AIR TEMPERATURE SENSOR CIRCUIT HIGH * P0116-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT PERFORMANCE * P0117-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT LOW * P0118-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT HIGH * P0122-THROTTLE POSITION SENSOR #1 LOW * P0123-THROTTLE POSITION SENSOR #1 HIGH * P0125-INSUFFICIENT COOLANT TEMP FOR CLOSED-LOOP FUEL CONTROL * P0128-THERMOSTAT RATIONALITY * P0129-BAROMETRIC PRESSURE OUT-OF-RANGE LOW * P0131-O2 SENSOR 1/1 CIRCUIT LOW * P0132-O2 SENSOR 1/1 CIRCUIT HIGH * P0133-O2 SENSOR 1/1 SLOW RESPONSE * P0135-O2 SENSOR 1/1 HEATER PERFORMANCE * P0137-O2 SENSOR 1/2 CIRCUIT LOW * P0138-O2 SENSOR 1/2 CIRCUIT HIGH * P0139-O2 SENSOR 1/2 SLOW RESPONSE * P0141-O2 SENSOR 1/2 HEATER PERFORMANCE * P0171-FUEL SYSTEM 1/1 LEAN * P0172-FUEL SYSTEM 1/1 RICH * P0201-FUEL INJECTOR 1 CIRCUIT * P0202-FUEL INJECTOR 2 CIRCUIT * P0203-FUEL INJECTOR 3 CIRCUIT * P0204-FUEL INJECTOR 4 CIRCUIT * P0234-OVERBOOST PERFORMANCE * P0243-WASTEGATE SOLENOID CIRCUIT * P0300-MULTIPLE CYLINDER MISFIRE * P0301-CYLINDER 1 MISFIRE * P0302-CYLINDER 2 MISFIRE * P0303-CYLINDER 3 MISFIRE * P0304-CYLINDER 4 MISFIRE * P0315-NO CRANK SENSOR LEARNED * P0325-KNOCK SENSOR 1 CIRCUIT * P0335-CRANKSHAFT POSITION SENSOR CIRCUIT * P0339-CRANKSHAFT POSITION SENSOR INTERMITTENT * P0340-CAMSHAFT POSITION SENSOR CIRCUIT * P0344-CAMSHAFT POSITION SENSOR INTERMITTENT * P0420-CATALYST EFFICIENCY (BANK 1) * P0440-GENERAL EVAP SYSTEM FAILURE * P0441-EVAP PURGE SYSTEM PERFORMANCE * P0443-EVAP PURGE SOLENOID CIRCUIT * P0452-NVLD PRESSURE SWITCH STUCK CLOSED * P0453-NVLD PRESSURE SWITCH STUCK OPEN * P0455-EVAP SYSTEM LARGE LEAK * P0456-EVAP SYSTEM SMALL LEAK * P0457-EVAP SYSTEM - LOOSE FUEL CAP * P0461-FUEL LEVEL SENSOR 1 PERFORMANCE * P0462-FUEL LEVEL SENSOR 1 CIRCUIT LOW * P0463-FUEL LEVEL SENSOR 1 CIRCUIT HIGH * P0480-COOLING FAN 1 CONTROL CIRCUIT * P0481-COOLING FAN 2 CONTROL CIRCUIT * P0498-NVLD CANISTER VENT VALVE SOLENOID CIRCUIT LOW * P0499-NVLD CANISTER VENT VALVE SOLENOID CIRCUIT HIGH * P0501-VEHICLE SPEED SENSOR #1 PERFORMANCE (MANUAL TRANS) * P0501-VEHICLE SPEED SENSOR #1 PERFORMANCE (AUTO TRANS) * P0506-IDLE SPEED LOW PERFORMANCE * P0507-IDLE SPEED HIGH PERFORMANCE * P0508-IDLE AIR CONTROL VALVE SENSE CIRCUIT LOW * P0509-IDLE AIR CONTROL VALVE SENSE CIRCUIT HIGH * P050A-COLD START IDLE AIR CONTROL SYSTEM PERFORMANCE * P050B-COLD START IGNITION TIMING PERFORMANCE * P050D-COLD START ROUGH IDLE * P0513-INVALID SKIM KEY * P0522-OIL PRESSURE SENSOR LOW * P0532-A/C PRESSURE SENSOR CIRCUIT LOW * P0533-A/C PRESSURE SENSOR CIRCUIT HIGH * P0551-POWER STEERING PRESSURE SWITCH PERFORMANCE * P0562-BATTERY VOLTAGE LOW * P0563-BATTERY VOLTAGE HIGH * P0572-BRAKE SWITCH #1 CIRCUIT LOW * P0573-BRAKE SWITCH #1 CIRCUIT HIGH * P0580-SPEED CONTROL SWITCH #1 LOW * P0581-SPEED CONTROL SWITCH #1 HIGH * P0582-SPEED CONTROL VACUUM SOLENOID CIRCUIT * P0586-SPEED CONTROL VENT SOLENOID CIRCUIT * P0594-SPEED CONTROL SERVO POWER CIRCUIT * P0600-SERIAL COMMUNICATION LINK * P0601-INTERNAL MEMORY CHECKSUM INVALID * P0622-GENERATOR FIELD CONTROL CIRCUIT * P0627-FUEL PUMP CONTROL CIRCUIT * P0630-VIN NOT PROGRAMMED IN PCM * P0632-ODOMETER NOT PROGRAMMED IN PCM * P0633-SKIM KEY NOT PROGRAMMED IN PCM * P063A-GENERATOR VOLTAGE SENSE CIRCUIT * P0645-A/C CLUTCH RELAY CIRCUIT * P0685-AUTO SHUTDOWN RELAY CONTROL CIRCUIT * P0688-AUTO SHUTDOWN RELAY SENSE CIRCUIT LOW * P0691-COOLING FAN 1 CONTROL CIRCUIT LOW * P0692-COOLING FAN 1 CONTROL CIRCUIT HIGH * P0693-COOLING FAN 2 CONTROL CIRCUIT LOW * P0694-COOLING FAN 2 CONTROL CIRCUIT HIGH * P0700-TRANSMISSION CONTROL SYSTEM (MIL REQUEST) * P0850-PARK/NEUTRAL SWITCH PERFORMANCE * P1105-TIP SENSOR SOLENOID CIRCUIT * P1106-BARO SOLENOID PERFORMANCE * P1115-GENERAL TEMPERATURE RATIONALITY * P1128-CLOSED LOOP FUELING NOT ACHIEVED - BANK 1 * P1187-THOTTLE INLET PRESSURE/MAP CORRELATION * P1188 TIP SENSOR PERFORMANCE * P1189-TIP SENSOR CIRCUIT LOW * P1190-TIP SENSOR CIRCUIT HIGH * P150D-COLD START ROUGH IDLE - OPEN THROTTLE START * P1593-SPEED CONTROL SWITCH STUCK * P1603-PCM INTERNAL DUAL-PORT RAM COMMUNICATION FAILURE * P1604-PCM INTERNAL DUAL-PORT RAM READ/WRITE INTEGRITY FAILURE * P1607-PCM INTERNAL SHUTDOWN TIMER RATIONALITY * P1696-EEPROM MEMORY WRITE DENIED/INVALID * P1697-EMR (SRI) MILEAGE NOT STORED * P1854-TIP BARO OUT OF RANGE * P1897-PCM PROCESSOR * P2074-MAP/TPS CORRELLATION - HIGH AIRFLOW/VACUUM LEAK DETECTED * P2096-DOWNSTREAM FUEL TRIM SYSTEM 1 LEAN * P2097-DOWNSTREAM FUEL TRIM SYSTEM 1 RICH * P2181-COOLING SYSTEM PERFORMANCE * P2302-IGNITION COIL 1 SECONDARY CIRCUIT-INSUFFICIENT IONIZATION * P2303-IGNITION COIL 2 SECONDARY CIRCUIT-INSUFFICIENT IONIZATION * P2503-CHARGING SYSTEM OUTPUT LOW * P2504-CHARGING SYSTEM OUTPUT HIGH * P2610-PCM INTERNAL SHUTDOWN TIMER FAST RATIONALITY * U0001-CAN C BUS * U0101-LOST COMMUNICATION WITH TCM * U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE * U0140-LOST COMMUNICATION WITH BODY CONTROL MODULE * U0141-LOST COMMUNICATION WITH FRONT CONTROL MODULE * U0155-LOST COMMUNICATION WITH CLUSTER/CCN * U0168-LOST COMMUNICATION WITH VEHICLE SECURITY CONTROL MODULE (WCM) * U110C-NO FUEL LEVEL BUS MESSAGE RECEIVED * U110E-LOST AMBIENT TEMPERATURE MESSAGE * U1110-LOST VEHICLE SPEED MESSAGE * U1120-LOST WHEEL DISTANCE MESSAGE * U1403-IMPLAUSIBLE FUEL LEVEL SIGNAL * U1411-IMPLAUSIBLE FUEL VOLUME SIGNAL RECEIVED * U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED * U1417-IMPLAUSIBLE LEFT WHEEL DISTANCE SIGNAL RECEIVED * U1418-IMPLAUSIBLE RIGHT WHEEL DISTANCE SIGNAL RECEIVED