Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 690 (DATA COMMUNICATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Diagnostic Code Index
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Diagnostic Code Index
WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B1000 | B1000 31: Engine Control Unit Performance - General Checksum Error B1000 33: Electronic Control Unit (ECU) Performance Special Memory Failure B1000 34: Electronic Control Unit (ECU) Performance RAM Failure B1000 35: Electronic Control Unit (ECU) Performance ROM Failure B1000 36: Electronic Control Unit (ECU) Performance EEPROM Failure B1000 37: Electronic Control Unit (ECU) Performance Watchdog B1000 39: Electronic Control Unit (ECU) Performance Internal Electronic Failure B1000 5A: Electronic Control Unit (ECU) Performance Plausibility Failure |
| DTC B1001 | B1001 00: Option Configuration Error B1001 45: Option Configuration Error Variant Not Programmed B1001 46: Option Configuration Error B1001 4B: Option Configuration Error Calibration Not Learned |
| DTC B1004 | B1004: Keep Alive Memory (KAM) Reset |
| DTC B1009 | B1009: EEPROM Checksum Mismatch |
| DTC C0550 | C0550 00: EEPROM Checksum Mismatch C0550 39: EEPROM Checksum Mismatch |
| DTC U0001 | U0001 00: High Speed CAN Communication Bus |
| DTC U0073 | Controller Area Network (CAN) Bus Communication |
| DTC U0100-U0299 | U0100 00: Lost Communication With ECM/PCM U0100 75: Lost Communication With ECM/PCM U0100 7F: Lost Communication With ECM/PCM U0101 00: Lost Communication With TCM U0102 00: Lost Communication With Transfer Case Control Module U0104 00: Lost Communication With Cruise Control Module U0104 7F: Lost Communication With Cruise Control Module U0106 00: Lost Communication With Glow Plug Control Module U0109 00: Lost Communication With Fuel Pump Control Module U0117 00: Lost Communication With Electrical PTO Control Module U0121 00: Lost Communication With Anti-Lock Brake System (ABS) Control Module U0122 00: Lost Communication With Vehicle Dynamics Control Module (ALC/ESC/ASCM) U0131 00: Lost Communication With Power Steering Control Module U0132 00: Lost Communication With Ride Level Control Module U0134 00: Lost Communication With Power Steering Control Module - Rear U0136 00: Lost Communication With Differential Control Module - Rear U0140 00: Lost Communication With Body Control Module U0141 00: Lost Communication With Body Control Module A U0151 00: Lost Communication With Restraints Control Module U0151 71: Lost Communication With Restraints Control Module Invalid Serial Data Received U0151 7F: Lost Communication With Restraints Control Module Erratic U0155 00: Lost Communication With Instrument Panel Cluster (IPC) Control Module U0156 00: Lost Communication With Information Center A (DIC) U0158 00: Lost Communication With Head Up Display U0159 00: Lost Communication With Parking Assist Control Module U0160 00: Lost Communication With Audible Alert Control Module U0164 00: Lost Communication With HVAC Control Module U0165 00: Lost Communication With HVAC Control Module - Rear U0168 00: Lost Communication With Vehicle Security Control Module U0170 00: Lost Communication With Restraints System Sensor A (PPS) U0172 00: Lost Communication With Rollover Sensor U0184 00: Lost Communication With Radio U0186 00: Lost Communication With Audio Amplifier U0291 00: Lost Communication With Television U0194 00: Lost Communication With Digital Radio Receiver (DRR) U0198 00: Lost Communication With Telematic Control Module (VCIM) U0199 00: Lost Communication With Door Control Module A (DDM) U0200 00: Lost Communication With Door Control Module B (PDM) U0208 00: Lost Communication With Seat Control Module A (DSM/MSM) U0209 00: Lost Communication With Seat Control Module B (HVSM) U0210 00: Lost Communication With Seat Control Module C (RHVSM) U0214 00: Lost Communication With Remote Function Actuation U0230 00: Lost Communication With Rear Gate Module U0232 00: Lost Communications With Side Object Detection (SOD) Module - Left U0233 00: Lost Communications With Side Object Detection (SOD) Module - Right U0236 00: Lost Communications With Column Locking Module (CLM) U0241 00: Lost Communication With Headlamp Control Module A U0249 00: Lost Communication With Entertainment Control Module - Rear B |
| DTC U1000 and U1255 | U1000: Class 2 Data Link U1255: Loss of Class 2 Communication |
| DTC U1300, U1301, or U1305 | U1300: Class 2 Data Link Low U1301: Class 2 Data Link High U1305: Class 2 Data Link High or Low |
| DTC U2103 | U2103 00: Fewer Controllers On Than Programmed |
| DTC U2105-U2199 | U2105 00: Lost Communication With Engine Control System U2106 00: Lost Communication With Transmission Control System U2107 00: Lost Communication With Body Control System U2108 00: Lost Communication With ABS/TCS Control System U2109 00: Lost Communication With Powertrain Control System U2110 00: Lost Communication With Chassis Multiple Control System U2111 00: Lost Communication With Steering Control System U2112 00: Lost Communication With Electronic Suspension Control (ESC) U2113 00: Lost Communication With Sensing and Diagnostic Module (SDM) U2114 00: Lost Communication With PPS or CPS U2115 00: Lost Communication With (Restraints Control System) U2116 00: Lost Communication With Instrument Panel Cluster (IPC) U2117 00: Lost Communication With Driver Information Center (DIC) U2118 00: Lost Communication With Head Up Display (HUD) U2119 00: Lost Communication With Daytime Running Lamps (DRL) System U2120 00: Lost Communication With Automatic Headlamp Leveling Device (AHLD) U2121 00: Lost Communication With Radio Display U2122 00: Lost Communication With Radio U2123 00: Lost Communication With Compact Disc Changer (CDX) U2124 00: Lost Communication With Audio Amplifier U2125 00: Lost Communication With Telematic Unit U2126 00: Lost Communication With (Mobile Communications Control System) U2127 00: Lost Communication With Front HVAC U2128 00: Lost Communication With Rear HVAC U2129 00: Lost Communication With Remote Function Actuator (RFA) U2130 00: Lost Communication With Driver Door Module (DDM) U2131 00: Lost Communication With Driver Seat Module (DSM) U2132 00: Lost Communication With Passenger Door Module (PDM) U2133 00: Lost Communication With Passenger Seat Module (PSM) U2134 00: Lost Communication With Rear Door Module (RDM) U2135 00: Lost Communication With Rear Integration Module (RIM) U2136 00: Lost Communication With Memory Mirror Module (MMM) U2137 00: Lost Communication With Vehicle Theft Deterrent (VTD) U2138 00: Lost Communication With Column Locking Module (CLM) U2139 00: Lost Communication With Column Integration Module (CIM) U2140 00: Lost Communication With Underhood Electrical Center (UEC) U2141 00: Lost Communication With Rear Electrical Center (REC) U2142 00: Lost Communication With Yaw Rate Sensor (YRS) U2143 00: Lost Communication With Steering Angle Sensor (SAS) U2144 00: Lost Communication With Distance Sensing Cruise Control Module U2145 00: Lost Communication With Parking Assistance System (PAS) U2146 00: Lost Communication With Shift Lever Module (SLM) U2147 00: Lost Communication With Auxiliary Heater System (AHS) U2148 00: Lost Communication With Sun Roof Module (SRM) U2149 00: Lost Communication With Tire Pressure Monitor (TPM) System U2150 00: Navigation Electronic Control Unit (ECU) Gateway Communications U2151 00: Navigation Electronic Control Unit (ECU) Communications U2152 00: Navigation Bus Request Line Circuit Low U2153 00: Navigation Electronic Control Unit (ECU) - VICS Communication Circuit U2160 00: Lost Communication With Steering Control System Sensor U2161 00: Lost Communication With Dash Integration Module (DIM) U2162 00: Lost Communication With Instrument Panel integration Module (IPM) U2163 00: Lost Communication With Left Rear Door Module (LRDM) U2164 00: Lost Communication With Right Rear Door Module (RRDM) U2165 00: Lost Communication With Driver Door Switch (DDS) U2166 00: Lost Communication With Driver Position Module (DPM) U2167 00: Lost Communication With Remote Control Door Lock Receiver U2168 00: Lost Communication With Side Object Detection (SOD) Module - Left U2169 00: Lost Communication With Side Object Detection (SOD) Module - Right U2170 00: Lost Communication With Four Wheel Drive (4WD) Clutch U2171 00: Lost Communication With Rear Seat Entertainment (RSE) U2172 00: Lost Communication With Digital Radio Receiver U2173 00: Lost Communication With Passive Entry and Passive Start System U2174 00: Lost Communication With Parking Heater System U2175 00: Lost Communication With Special Vehicle Module U2176 00: Lost Communication With Power Take Off (PTO) Control Module U2177 00: Lost Communication With Cruise Control Module U2178 00: Lost Communication With Trailer Interface Module U2179 00: Lost Communication With Television Module U2180 00: Lost Communication With Folding Top Control Module U2181 00: Lost Communication With Moveable Roof Module |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.