U1016
Lost Communications With Powertrain/Engine Control Module
U1016 is an OBD-II diagnostic trouble code meaning: Lost Communications With Powertrain/Engine Control Module. Common causes: open or short circuit in the can bus, oxidized or damaged connector contacts. Estimated repair cost: $6–167.
Symptoms
- Check Engine Light Is On
- The car may go into emergency mode
- Loss of engine power
- Some systems do not work (cruise control, ABS, etc.)
- Floating engine speed
Causes
- Open or short circuit in the CAN bus
- Oxidized or damaged connector contacts
- Engine control module malfunction
- ECM power problems
- Software errors in modules
How to Fix
- Check the integrity of the CAN bus wiring
- Inspect and clean ECM connector contacts
- Check ECM power supply and ground
- Scan all modules for errors
- Replace ECM or wiring harness if necessary
Related codes
FAQ
What does the U1016 code mean?
U1016 is an OBD-II diagnostic trouble code that indicates: Lost Communications With Powertrain/Engine Control Module
What causes a U1016 error code?
The most common causes of U1016 include: Open or short circuit in the CAN bus; Oxidized or damaged connector contacts; Engine control module malfunction; ECM power problems.
How do I fix a U1016 diagnostic trouble code?
To fix U1016: Check the integrity of the CAN bus wiring. Inspect and clean ECM connector contacts. Check ECM power supply and ground. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1016?
Limited driving only, diagnose soon
How much does it cost to fix U1016?
The estimated repair cost for U1016 is $6–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat