U0105

Lost Communication With Fuel Injector Control Module

Q: Is it safe to drive with U0105?

Not really — because this module controls the injectors, the engine may run poorly, stall, or refuse to start, so drive as little as possible until it's diagnosed.

Q: Can I just clear U0105?

You can, but it returns unless the power, ground, wiring, or module fault is repaired, and the drivability problem will remain.

Communication network (fuel injection) Generic OBD-II High

What it means

U0105 means another module has lost communication with the fuel injector control module — the unit that drives the injectors on engines that use a separate injector driver. Because it directly affects fueling, this code can cause hard starting, stalling, rough running, or a no-start, and it's usually a power, ground, or wiring problem at the module.

High

Can I keep driving? Often not safely — losing the module that drives the injectors can cause a hard start, rough running, stalling, or a no-start, so limit driving until it's fixed.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on, sometimes with reduced power or limp mode
Hard starting, no-start, or stalling
Rough running, misfire, or hesitation
Fuel injector control module not responding to a scan tool

Common causes

Most likely first

Loss of power or ground to the fuel injector control moduleLikely
Blown fuse feeding the moduleCommon
Damaged, corroded, or loose wiring and connectors to the moduleCommon
CAN bus wiring fault between the module and the networkLess often
Failed fuel injector control moduleLess often

How to diagnose & fix

Work through it in order

Scan all modules and confirm the fuel injector control module is unreachable.
Check battery voltage and the module's fuses, power, and ground feeds first.
Inspect the module's connectors and wiring for corrosion, damage, or water intrusion.
Check the CAN bus wiring between the module and the network for opens or shorts.
If power, grounds, and bus wiring are good, the module has likely failed — replace and program it as required, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with U0105?+

Not really — because this module controls the injectors, the engine may run poorly, stall, or refuse to start, so drive as little as possible until it's diagnosed.

Can I just clear U0105?+

You can, but it returns unless the power, ground, wiring, or module fault is repaired, and the drivability problem will remain.

Read & clear U0105 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX