U0418 A module received implausible data from the brake system (ABS) control module

Invalid data received from brake system control module

U0418 in short

U0418 means a module received data from the brake (ABS) control module that did not make sense. Low battery voltage and module software are documented causes; a faulty brake module or wiring is possible. Because it involves the brakes, have it checked soon, and stop if a red brake warning appears or the pedal feels wrong.

The brake control module shares wheel speed, brake pressure and stability data with the engine, steering and driver-assist modules. U0418 means it is still sending messages, but one was out of range or did not fit with other data.

Jeep's bulletin for the 2021 Cherokee says U0418 can be set falsely when the battery drops below 10 volts. Chrysler and Jeep released engine computer updates that cover U0418, and Ford's 2020-2022 Escape stored it in the camera module and fixed it with power steering software.

If U0418 comes back with ABS or brake codes and the brake warnings stay on, the brake module itself needs diagnosis by a shop.

Most likely causes

  1. Low battery voltage during starting

    Supported by vehicle data
    Why it ranks here
    Jeep's 18-078-22 says U0418 can be set erroneously by a low battery (below 10 volts) on the 2021 Cherokee.
    What would change this
    Rises if the battery is weak or the car was slow to crank. Falls if the battery tests good and the code returns.

  2. Engine, steering or brake module software that needs an update

    Supported by vehicle data
    Why it ranks here
    PCM updates from Jeep (18-078-22, 18-023-19) and Chrysler (18-001-19) list U0418, and Ford's SSM 50771 fixes U0418 in the camera module with power steering software.
    What would change this
    Rises if a dealer finds an update for your VIN. Falls if all modules are current.

  3. Faulty brake system control module

    Possible — needs testing
    Why it ranks here
    TaT names internal module faults as a typical cause, but none of the bulletins we found ended in a module replacement for U0418.
    What would change this
    Rises if the brake module stores its own internal codes. Falls if voltage and software fixes clear it.
    How to test the brake system control module (abs module)

  4. Network wiring, connector or ground fault

    Possible — needs testing
    Why it ranks here
    Unstable power, ground and CAN faults are general causes of invalid-data codes and are checked once the simpler causes are ruled out.
    What would change this
    Rises if lost-communication codes are also stored. Falls if bus resistance and voltage are normal.

What to test first

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

  1. Scan all modules and note which module stored U0418 and what else is set.

    Low riskTool: scan tool that reads all modules

    • IfABS or brake pressure codes are also stored

      It meansThe brake module may have its own fault; have a shop diagnose the brakes.

      Go to step 4

    • IfU0418 sits in the engine or camera module with no brake codes

      It meansCheck the battery and software first.

      Go to step 2

  2. Have the battery and charging system tested.

    Low riskTool: battery tester

  3. Ask a dealer whether your VIN has a bulletin or software update for U0418.

    Low risk

  4. Have a shop check the brake module power, ground and network wiring.

    Best left to a shopTool: multimeter, scan tool

    Warning:This is part of the brake system. Do not probe connectors with the ignition on, and avoid yellow airbag connectors. Let a shop do it if unsure.

Symptoms

  • Check engine light
  • ABS or stability warning light
  • "Pre-collision Assist Not Available" or cruise control unavailable messages
  • Red brake warning or a brake pedal that feels wrong Gets more serious: stop and have it checked.

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.

Parts and cost context

  • Brake system control module (ABS module):The brake system control module is usually built onto the ABS hydraulic unit. Replacing it is a shop job and may need programming and a brake bleed. Labor varies; get a quote.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Jeep

  • 2019–2021 · Cherokee

    Supported by vehicle data

    Jeep 18-023-19 and 18-078-22: PCM updates covering U0418; the 2021 bulletin says low battery voltage can set it falsely. Whether it is still current is not verified.

  • 18-078-22Status unverified

    PCM updates, P0031 and U0418

    2021cherokee · issued · NHTSA 10214622

    PCM reprogramming; notes U0418 can be set erroneously by a low battery below 10 volts.

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

  • 18-023-19 REV. BStatus unverified

    PCM software updates

    2019cherokee · issued · NHTSA 10169222

    PCM reprogramming for a MIL with a list of DTCs including U0416 and U0418.

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

Chrysler

  • 2018 · Pacifica

    Supported by vehicle data

    Chrysler 18-001-19: PCM update covering U0418 with starter and restart codes. Whether it is still current is not verified.

  • 18-001-19 REV BStatus unverified

    PCM updates

    2018pacifica · issued · NHTSA 10162529

    PCM reprogramming for a MIL with P06E9, U0418, U0432 and P06EF.

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

Ford

  • 2020–2022 · Escape

    Supported by vehicle data

    Ford SSM 50771: driver-assist messages with U0418:86 in the camera module; power steering software update (also Bronco Sport, Maverick, Corsair). Whether it is still current is not verified.

  • SSM 50771Status unverified

    Driver assistance messages with U0415, C0051 and U0418

    2020–2022escape, bronco-sport, maverick · issued · NHTSA 10211905

    Driver-assist warnings with U0418:86 in the image processing module; update the power steering module software. Also covers Lincoln Corsair.

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

  • U0416A module received implausible data from the stability control (vehicle dynamics) module

    Same system Supported by vehicle data

    Jeep's 18-023-19 lists U0416 and U0418 together on the 2019 Cherokee.

  • U0415A module received invalid data from the anti-lock brake (ABS) module

    Shares causes Supported by vehicle data

    Ford's SSM 50771 lists U0415 in the steering module and U0418 in the camera module together, fixed by power steering software.

All Module network (CAN bus) communication codes

U0418 questions

Can a weak battery cause U0418?

Yes. Jeep says U0418 can be set falsely when the battery drops below 10 volts, so test the battery before replacing any module.

Sources and review

  1. TaT fault code library: U0418 Data Invalid From Braking System Control Module A — TaT (Technical and Training) Scan Data
  2. Jeep 18-078-22: PCM updates, P0031 and U0418 (2021 Cherokee) — FCA US / NHTSA ,
  3. 2023 Integra Owner's Manual: Indicator, Coming On/Blinking — American Honda Motor Co.
  4. Jeep 18-023-19 REV. B: PCM software updates (2019 Cherokee) — FCA US / NHTSA ,
  5. Chrysler 18-001-19 REV B: PCM updates (2018 Pacifica) — FCA US / NHTSA ,
  6. Ford SSM 50771: driver assistance messages with U0415, C0051 and U0418 (2020-2022 Escape and others) — Ford Motor Company / NHTSA ,
  7. ASE L1 study guide: Network U-codes — Open Exam Prep
Last reviewed
Written by
Saurabh K.
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