Lost Communication with Personal Computer Module
Diagnostic trouble code U0192 indicates that the powertrain control module (PCM) or another critical module has lost communication with the vehicle's personal computer module. This occurs when a transmitting module does not receive an acknowledgment (ACK) message from the receiving module on the controller area network (CAN) bus within the manufacturer's specified time and number of attempts. The loss of communication can be due to a data network fault, physical disconnection of the module, or an internal failure within the personal computer module.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Faulty or disconnected CAN bus wiring to the personal computer module
- Corrosion or bent pins in the personal computer module connectors
- Damaged or internally failed personal computer module
- Loss of voltage supply (VCC) or ground (GND) to the personal computer module
- Short to ground or voltage on the CAN bus High or Low communication wires
3. Symptoms You Will Notice
- Check Engine Light illuminated
- Vehicle may experience drivability issues or fail to start
4. Step-by-Step Diagnosis
Scan for all stored codes and freeze frame data
Inspect CAN bus wiring and connectors for damage, corrosion, or loose connections
Check voltage supply and ground at the personal computer module
Test CAN bus High and Low circuits for shorts or opens
Verify communication with other modules; if only the personal computer module is missing, suspect a module fault
If necessary, replace the personal computer module and reprogram
5. Frequently Asked Questions
Is it safe to drive?▼
The severity is medium. You may be able to drive short distances, but drivability issues or a no-start condition can occur. It is recommended to diagnose and repair promptly.
How much does it cost to fix?▼
Costs vary widely: from $100-$200 for wiring repairs to $500-$1,500+ for module replacement and programming.