Code
TOTAL
GWM
Tesla Alert
unique codes: 498
AI status
Completed
Completed
100%
Causes
- Manufacturer-specific fault reported by one or more control modules (ECM/TCM/BCM/ABS/airbag/etc.)
- Intermittent or permanent wiring/connectors fault (corrosion, loose connector, broken wire)
- Loss of power or ground to a control module
- CAN/LIN bus communication errors or high error rate
- Failed sensor or actuator (voltage open/short, out-of-range signal)
- Software/firmware error or calibration mismatch after updates
Symptoms
- Malfunction Indicator Lamp/Warning lamp illuminated (MIL) or multiple warning lamps
- One or more vehicle systems partially or completely inoperative (engine, transmission, ABS, airbags, cluster)
- Limp-home or reduced performance mode
- Intermittent faults that clear after key cycle then return
- No-start or hard-start conditions if powertrain modules are affected
- Communication errors shown on scan tool (module not responding)
What to check
- Read live manufacturer-specific codes and freeze-frame using GWM OEM or compatible heavy-coverage diagnostic tool
- Record whether codes are active, pending, or historic and note occurrence conditions (engine temp, speed, load)
- Perform visual inspection of battery terminals, main ground straps, and relevant module grounds
- Inspect harnesses and connectors for corrosion, bent pins, water intrusion or damage near the suspect module(s)
- Check battery voltage at rest and during cranking (should be >11V under cranking for most vehicles)
- Scan CAN/LIN network for error counters, bus off events, and module presence; check for proper termination resistances (approx. 60 ohm across CAN high/low)
Signal parameters
- Battery voltage (key on, cranking) in volts
- CAN bus voltages: CAN_H and CAN_L idle levels and waveform integrity
- CAN bus error/frame counters and message frequency for affected modules
- Sensor voltages (0–5 V typical) and signal frequency where applicable (MAF frequency, wheel sensor Hz)
- Actuator duty cycles (injector pulsewidth, fuel pump relay duty)
- Engine RPM and throttle position during fault event
Diagnostic algorithm
- Connect GWM OEM or compatible full-feature scan tool and download all manufacturer-specific codes and freeze-frame data; record exact code IDs
- Confirm lamp status (active/pending/historic). If only pending, attempt to reproduce conditions that set the code
- Perform a visual inspection of related wiring, connectors and module mounting; secure or repair any obvious damage
- Check battery state-of-charge and charging system; clean and tighten battery and ground connections
- Using the scan tool, verify module communications on the CAN/LIN networks; identify any module showing ‘no response’ or multiple communication errors
- If communication or wiring is suspected, measure CAN bus voltages and check termination resistors; repair shorts/opens as required
- Backprobe sensor/actuator circuits to verify expected signal parameters under known conditions (compare to known-good values or service data)
- If a single module fault is isolated, attempt to clear codes, then perform a controlled test or road test to verify if fault returns
- If suspected software or calibration issue, check for available ECU software updates or reprogramming bulletins and perform reflash per manufacturer procedures
- Replace only verified faulty components. After repair, clear codes and perform verification drive; monitor for reoccurrence and re-scan to confirm issue resolved
Likely causes
- Faulty or intermittent connector at the affected module(s)
- Low battery/poor charging system causing voltage dips during self-test
- CAN bus short or open between modules causing multiple stored codes
- Sensor or actuator failure on the subsystem reporting the code (e.g., MAF, O2, MAP, pressure sensors)
- ECU software fault or corrupted calibration after service
Fault status
Status
Manufacturer aggregate status: TOTAL (collection of GWM-specific codes; 498 unique possibilities). Codes may be stored as Active, Pending, or Historic. Use GWM OEM diagnostic tool to list specific sub-codes and freeze-frame data for guidance.
Repair difficulty: Medium
Diagnostic time: 0.5–3 hours
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