U0005 Possible Causes
- Diagnosis of this diagnostic trouble code (DTC) is performed through vehicle symptoms
- Check for additional codes
- Faulty control module
- Control module harness is open or shorted
- Poor electrical connection in control module circuit
How is U0005 Code Repaired?
Begin by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Illuminated check engine light (or service engine soon warning light)
U0005 Meaning
A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged between devices. Devices have programmed information about messages to exchange on serial data circuits. The CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in sleep mode, both lines carry 2.5 V. When data bits are transmitted, the CAN high line rises to 3.75 V and the CAN low line drops to 1.25 V, thus generating a 2.5 V differential between the lines. Since communication relies on a voltage difference between the two bus lines, the CAN bus is NOT susceptible to inductive spikes, electric fields, or any other noise. The diagnostic trouble code (DTC) is set when a supervised periodic message including the transmitting device’s availability has not been received.