U0452 A module received data from the restraints (airbag) control module that did not make sense

Invalid data received from restraints control module

U0452 in short

U0452 means a module got invalid data from the restraints control module, the airbag computer. Ford ties it to an airbag lamp and a SYNC 911 Assist fault that a software update fixes on 2017-2018 Fusion and MKZ. Because airbags may be affected, have it checked soon.

The restraints control module decides when airbags and belt pretensioners fire and shares crash data with other modules. A module that receives data from it that fails a check stores U0452. A Mazda CX-30 owner read the code as "invalid data received from restraints control panel" after a crash.

Ford bulletins for the 2017-2018 Fusion and MKZ list U0452 in the infotainment module with an airbag lamp and say to reprogram the restraints module. A 2015-2017 F-150 bulletin shows U0452 stored in the front controls interface module with other codes when network traffic locks the module up. GM bulletins list it among many codes on 2014-2017 trucks and SUVs where a pinched body control module ground is the named check.

Because airbags are involved, this page explains the code only and gives no repair steps.

Most likely causes

  1. Restraints control module software that needs an update (Fusion and MKZ)

    Supported by vehicle data
    Why it ranks here
    Ford SSM 46109 and SSM 46901 tell dealers to reprogram the restraints module and redo the as-built configuration when U0452 and related codes are stored with an airbag lamp.
    What would change this
    Rises on 2017-2018 Fusion and MKZ with an airbag lamp. Falls on other vehicles or after the update.

  2. Body control module ground pinched by the dash insulator mat (some GM trucks)

    Supported by vehicle data
    Why it ranks here
    GM PIT5405B lists U0452 with many codes and has dealers check the G218 ground and connectors X183 and X133.
    What would change this
    Rises on 2014-2017 GM trucks and SUVs with many codes. Falls if grounds are good.
    How to test the body control module (bcm)

  3. Network traffic locking up the front controls interface module (F-150)

    Supported by vehicle data
    Why it ranks here
    Ford SSM 46902 names excessive CAN traffic as the possible cause of U0452 and other codes in the FCIM on 2015-2017 F-150.
    What would change this
    Rises with A/C, radio or window switch trouble. Falls if those work normally.

  4. Transmission lead frame fault stored with it (F-150 owner report)

    Possible — needs testing
    Why it ranks here
    One 2017 F-150 owner links U0452-82 with U0155, U0401 and a transmission code to a lead frame failure, but gives no shop confirmation.
    What would change this
    Rises if transmission codes and shifting trouble appear with it. Falls if the transmission behaves normally.

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Read all modules for codes and note whether the airbag lamp is on and which modules store U0452.

    Low riskTool: scan tool that reads all modules

  2. Have a technician check the restraints module, its connectors and the network, and follow the maker bulletin for the exact vehicle.

    Best left to a shop

    Warning:Airbag systems can fire unexpectedly; leave all testing near airbag modules and wiring to a trained technician.

Symptoms

  • Airbag lamp on
  • SYNC 911 Assist not operational message
  • Reduced power, stall or lost steering assist Gets more serious: stop and have it checked.
  • A/C, radio or window switches intermittent

How to fix

This is a safety-critical system, so we explain the code but don't give repair steps. Have it inspected by a qualified technician.

On your vehicle

Ford

  • SSM 46109Status unverified

    Air bag lamp, RCM DTCs including U0452

    2017fusion · issued · NHTSA 10090515

    Reprogram the restraints control module and redo the as-built configuration. Only the NHTSA summary was read.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • SSM 46901Status unverified

    Air bag lamp and SYNC 911 Assist not operational, APIM DTC U0452

    2017–2018fusion · issued · NHTSA 10127406

    Reprogram the restraints control module and redo the as-built configuration. Only the NHTSA summary was read.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • SSM 46902Status unverified

    Intermittent A/C, radio and window switch control, DTCs including U0452 in the FCIM

    2015–2017f-150 · issued · NHTSA 10127407

    Battery reset, clear codes and FCIM self-test before replacing the module. Only the NHTSA summary was read.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Lincoln

  • SSM 46109 (Lincoln)Status unverified

    Air bag lamp, RCM DTCs including U0452

    2017mkz · issued · NHTSA 10090515

    Same Ford SSM for the MKZ. Only the NHTSA summary was read.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • SSM 46901 (Lincoln)Status unverified

    Air bag lamp and SYNC 911 Assist not operational, APIM DTC U0452

    2017–2018mkz · issued · NHTSA 10127406

    Same Ford SSM for the MKZ. Only the NHTSA summary was read.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Chevrolet

  • PIT5405CStatus unverified

    Reduced power, steering assist, stall or blank displays with many DTCs

    2014–2017silverado-1500, suburban, tahoe · issued · NHTSA 10113356

    Check the body control module ground at G218. Only the NHTSA summary was read.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

GMC

  • PIT5405C (GMC)Status unverified

    Reduced power, steering assist, stall or blank displays with many DTCs

    2014–2017sierra-1500, yukon, yukon-xl · issued · NHTSA 10113356

    Same GM preliminary information as for Chevrolet. Only the NHTSA summary was read.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Cadillac

  • PIT5405C (Cadillac)Status unverified

    Reduced power, steering assist, stall or blank displays with many DTCs

    2015–2017escalade, escalade-esv · issued · NHTSA 10113356

    Same GM preliminary information as for Chevrolet. Only the NHTSA summary was read.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Mazda

  • U0140Lost communication with the body control module

    Same system Supported by vehicle data

    U0140 and U0452 are stored together in the front controls interface module on 2015-2017 F-150.

  • U0401A module received invalid data from the engine or powertrain computer

    Same system Supported by vehicle data

    U0401 appears with U0452 in Ford SSM 46902 and in a 2017 F-150 owner scan.

All Module network (CAN bus) communication codes

Sources and review

  1. Ford SSM 46901 (NHTSA 10127406): 2017-2018 Fusion/MKZ air bag lamp and SYNC 911 Assist not operational, APIM DTC U0452 — NHTSA (manufacturer communication)
  2. NHTSA complaint ODI 11514192: 2021 Mazda CX-30 — NHTSA (owner complaint)
  3. Ford SSM 46109 (NHTSA 10090515): 2017 Fusion/MKZ air bag lamp, RCM DTCs including U0452 — NHTSA (manufacturer communication)
  4. GM PIT5405B (NHTSA 10083324): reduced power, steering assist, engine stall or blank displays with many DTCs — NHTSA (manufacturer communication)
  5. Ford SSM 46902 (NHTSA 10127407): 2015-2017 F-150 intermittent A/C, radio and window switch control with U0140, U0155, U0253, U0401 and/or U0452 in the FCIM — NHTSA (manufacturer communication)
  6. NHTSA complaint ODI 11719302: 2017 Ford F-150 — NHTSA (owner complaint)
Last reviewed
Written by
Saurabh K.
Editorial review
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