Fault Code Lookup › Network codes › U1012
U1012 Network · manufacturer code
U1012 fault code: what 4 Ford owners reported
U1012 is a manufacturer-specific network code (network: communication between the car's control modules), so its exact definition belongs to the carmaker and is not in the generic OBD-II list. What it meant in practice is below, from 4 complaints owners filed with NHTSA. Updated November 9, 2026.
- 4owner reports
- 2car models
- 0mention a crash
- 0mention a fire
- 2017–2024model years
Which cars get code U1012?
Every model whose owners mentioned U1012 in a complaint, most reports first. Each year opens that car's full problem report. Popular models collect more reports because more of them are on the road.
Ford F-250
2 reportsWhere does U1012 show up?
By brand
- Ford4
Component the owner filed it under
Is there a recall for U1012?
The others concern the component owners file this code under (Service Brakes) on the same cars; they may or may not relate to the code. Recall repairs are free; check your VIN at nhtsa.gov/recalls.
Service Brakes, Hydraulic: Foundation Components: Master Cylinder Ford Motor Company (Ford) is recalling certain 2017-2018 F-150, Expedition, and Lincoln Navigator vehicles. The brake master cylinder may allow brake fluid to leak from the front wheel circuit into the brake booster.
2017 Ford F-150. Full risk and remedy on each car's report.
Service Brakes, Hydraulic: Power Assist Ford Motor Company (Ford) is recalling certain 2016-2017 Ford Expedition, Lincoln Navigator, and 2016-2018 F-150 vehicles equipped with 3.5L Ecoboost engines. The brake master cylinder may allow brake fluid to leak from the front wheel circuit into the brake booster.
2017 Ford F-150. Full risk and remedy on each car's report.
Service Brakes, Hydraulic: Foundation Components: Master Cylinder Ford Motor Company (Ford) is recalling certain 2014-2017 F-150 pickup trucks equipped with 3.5L Ecoboost engines. The brake master cylinder may leak brake fluid into the brake booster.
2017 Ford F-150. Full risk and remedy on each car's report.
What happened when owners saw U1012?
4 of the 4 reports, spread across the models above, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
While driving I will get a wrench symbol with a bunch of codes pop up u0121:00:28 u0131:00:28 u0137:00:28 u0164:00:28 u0199:00:28 u0200:00:28 u0212:00:28 u0252:00:28 u0256:00:28 u1012:00:28 p0557:00:28 p1935:00:68 p193e:00:28 I have also had it jerk while driving ( went down into first gear) while having no power to my gauge cluster ac nothing
Wrench light on dash comes on sporadically with message that there is a powertrain malfunction / reduced power. It said the system has detected a powertrain or 4 WD fault. Reduced power may put both the driver and others at risk depending on the area in which this occurs, ex interstate. Dealer has yet to remedy problem. Car has been to the dealer service department 4 times for this issue. Codes present are U0121 (lost communication with ABS control module A), U1012 (invalid internal control module data received from ABS control module), and U3035 (communication authentication signal invalid data)
This first began when we went to Oregon from dry Central Valley in California and hit rain. Multiple error messages appeared: Service Advance Trac, Check 4x4, Hill Assist Not Available, ABS, Steering Assist Fault, etc. Power steering assist was lost and is now intermittent which creates a dangerous situation. The ABS brakes made load groaning noises. I went to O’Reilley’s and used their OBD2 scanner. It showed codes: U1012-00, U0212-00, U0121-00, P062C-00, all being communication errors. I got a new battery and had a shop scan it. The clockspring was bad so it was replaced with an OEM from Sunrise Ford. He can’t get any communication with any of the other modules. I researched the issues and…
While driving, multiple warning lights illuminate simultaneously — ABS, brake, and all driver assist/safety systems — and the drive mode drops to Standard Locked. During these events the anti-lock braking, stability control, traction control, and trailer sway control systems appear to go offline. I have photographs of the illuminated warnings. My own OBD-II scan on 7/9/26 recorded U0121 (lost communication with ABS module), U0415 (invalid data from ABS module), U3035 (communication authentication failure), and U1012. The dealer's own scan confirmed multiple stored "lost communication with ABS module" codes in module history. The vehicle has a documented history of water intrusion from the…
U1012: questions drivers ask
What does code U1012 mean?
U1012 is a manufacturer-specific network code (network: communication between the car's control modules), so its exact definition depends on the carmaker and is not in the generic OBD-II list. 4 owners reported it to NHTSA, most often for the Ford F-150 (2), Ford F-250 (2); their reports describe what happened.
Which cars get code U1012 most often?
In NHTSA owner complaints, U1012 is mentioned most for the Ford F-150 (2), Ford F-250 (2), across 2 models and model years 2017 to 2024. Popular models collect more reports because more of them are on the road.
Is there a recall for code U1012?
No NHTSA recall text names U1012 directly. 3 recalls on the cars that report this code concern the same component owners name most (Service Brakes); they may or may not relate to the code. Check your VIN at nhtsa.gov/recalls.
What should I do if my car shows U1012?
Write down when the code appeared and what the car did (warning lights, loss of power, noises, speed, weather). Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer or independent workshop to read the stored freeze-frame data before anyone clears the code, and keep the repair order. If the car loses power in traffic, stop driving it. CarHooq does not diagnose: these are owner reports and official recall notices, not repair advice.
How this page was made
CarHooq read the text of every owner complaint filed with NHTSA for 19 US and European brands (model years 2012 onwards) and picked out the diagnostic trouble codes owners wrote down. This page lists every mention of U1012. Manufacturer codes have no public standard definition, so CarHooq shows only what owners reported. Nothing here is a diagnosis. More answers: the fault code FAQ. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 9, 2026. How CarHooq reports are made.
Is something missing or wrong on this page? Tell CarHooq. One line is enough; every message is read.
Look up another code
Or check a car: Problem Lookup · Used-car checker