U0105: Lost Communication With Fuel Injector Control Module

Severity

low

NHTSA Reports

Vehicles Affected

System

Powertrain

Last reviewed: Aug 8, 2026 Last updated: Aug 8, 2026

Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to generic code level because this page is not scoped to one make or model.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for U0105.
NHTSA recalls, complaints, and manufacturer communications — Used to check public owner complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What Does U0105 Mean?

U0105 code: Lost Communication With Fuel Injector Control Module. Symptoms, likely causes, diagnostic path, severity, and repair cost context.

Symptoms of U0105

⚠️ Warning light or diagnostic trouble code is stored
⚠️ Multiple warning lights, communication faults, no-start, or intermittent module messages may occur
⚠️ Symptoms may change depending on battery voltage and network wake/sleep state
⚠️ Vehicle may fail an emissions or safety inspection until the code is resolved and monitors reset

Common Causes

🔍 CAN/LIN network communication loss, module offline, low battery voltage, or gateway issue
🔍 Wiring, connector, water intrusion, ground, or aftermarket accessory interference
🔍 Module programming or replacement issue requiring service-manual procedures

U0105 Reports by Year

2019

2012

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"STEERING FROZE UP WHILE LEAVING MY DRIVEWAY AND P/S LIGHT CAME ON. SHUT ENGINE OFF AND BACK ON, BUT DID NOT RESOLVE. I RECALL AT LEAST ONE OTHER TIME THAT STEERING LOCKED UP TEMPORARILY WHILE AT A STOP. TOOK TO DEALERSHIP FOR DIAGNOSTIC AS MANUAL RECOMMENDS. DIAGNOSTIC SHOWS DTCS U0105 AND U0121. "
— Toyota Rav4 owner, 2019-01-30

"HEARD ABNORMAL MECHANICAL RATTLE FROM THE FRONT END GOING OVER ROUGH STREETS IN SAN FRANCISCO. TOOK VEHICLE IN SUSPECTING SUSPENSION ISSUE TO CAPITOL TOYOTA OF SAN JOSE. DIAGNOSIS WAS STEERING RACK HAS A KNOWN PART ISSUE, INTERNAL TO ITS DESIGN, NOTHING THE DEALER COULD DO, AS FACTORY DID NOT ALLO"
— Toyota Rav4 owner, 2012-05-25

Source: NHTSA Complaints Database

Most Reported Vehicles for U0105

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	TOYOTA RAV4

U0105 Reports by Vehicle

Detailed NHTSA complaint analysis for each vehicle model.

TOYOTA RAV4

2 NHTSA reports · Peak: 2006

Frequently Asked Questions

Is U0105 enough to replace a part?

No. The code identifies the circuit or system that failed a test, but live data, freeze-frame data, wiring checks, and related codes are needed before replacing parts.

Can I drive with U0105?

It depends on the warning lights and symptoms. Avoid driving if the code is tied to air bags, brakes, severe drivability, overheating, smoke, fuel smell, or reduced power.

Reported Repair Costs for U0105

Based on 5 owner-reported repair costs from NHTSA complaints.

Low End

$160

Typical

$200

High End

$1600

⚠️ These are owner-reported costs, not estimates. Actual costs vary by location, labor rates, and root cause. Source: NHTSA complaints database.

What To Do Next

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.