U1424 On Chrysler, Dodge, Jeep and Ram vehicles, U1424 means a module received an implausible engine torque signal

Implausible engine torque signal received

U1424 in short

On Chrysler, Dodge, Jeep and Ram vehicles, U1424 means a module received an implausible engine torque signal. FCA bulletins treat it as a PCM software flash item on several models, and owners also report power loss and shutoffs. Have it checked soon, and stop if the engine shuts off.

The engine computer sends a torque figure that other modules, such as the transmission and stability systems, use. When what arrives does not make sense, U1424 is stored. FCA words it as "Implausible Engine Torque Signal Received".

FCA bulletins for the 2014-2016 Cherokee, 2016 Chrysler 200, 2016 Charger and Challenger and 2013-2015 Ram 1500 list U1424 among codes fixed by reprogramming the engine computer. A Dodge Caliber owner read it with U1407 and U1425 and an ETC light with power loss. Two Ram 1500 owners had the engine shut off with U1424 stored and the dealer pointed to crank or cam sensors.

The sources do not name one cause, so test before replacing sensors.

Pick your make

U1424 is a manufacturer-specific code: its meaning depends on who built the car.

Other makes: meaning not verified. Check with a scan tool that reads manufacturer definitions.

Most likely causes

  1. Engine computer software that needs a flash

    Supported by vehicle data
    Why it ranks here
    FCA 18-035-16, 18-051-16, 18-032-16 and 18-103-16 list U1424 among codes that PCM reprogramming addresses on specific models.
    What would change this
    Rises on listed models with software not updated. Falls once updated; a Cherokee owner saw the code return after recall flashes.
    How to test the engine control module (ecm / pcm)

  2. Crankshaft or camshaft position sensor problem

    Possible — needs testing
    Why it ranks here
    A Ram dealer planned to change the crankshaft sensor and another Ram had a cam sensor replaced without a fix, and bulletins list P0335 with U1424.
    What would change this
    Rises if P0335 or P0340 is stored and the engine shuts off. Falls if a sensor swap does not stop it.

  3. Throttle or pedal signal problem (Caliber)

    Possible — needs testing
    Why it ranks here
    A Dodge Caliber owner stored U1407, U1424 and U1425 with an ETC light and power loss, and a Charger and Challenger bulletin lists throttle position circuit codes with U1424.
    What would change this
    Rises with an ETC light and throttle codes. Falls if no throttle codes are present.
    How to test the electronic throttle body

What to test first

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

  1. Read all codes and note whether U0402, P0335, P0340 or throttle position codes are stored with U1424, and whether the engine has shut off.

    Low riskTool: scan tool

  2. Have a technician check the crankshaft and camshaft sensors, throttle and pedal signals and wiring against live data.

    Best left to a shop

    Warning:An engine that shuts off at speed is a safety risk; leave testing to a shop.

Symptoms

  • Check engine or ETC light
  • Engine shuts off at stops or speed Gets more serious: stop and have it checked.
  • Loss of power Gets more serious: stop and have it checked.
  • Rough idle at start-up

How to fix

Parts and cost context

  • Crankshaft position sensor:Owners report dealers considering this sensor; confirm with live data first; 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

  • 18-035-16 REV.AStatus unverified

    Flash: powertrain diagnostic and system improvements, U1424

    2015cherokee · issued · NHTSA 10074933

    PCM reprogramming for MIL with U1424 and other codes. Only the NHTSA summary was read.

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

  • 18-090-16Status unverified

    Flash: powertrain diagnostic and system enhancements, U1424

    2016wrangler · NHTSA 10121706

    PCM reprogramming that lists U1424. Only the NHTSA summary was read.

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

Chrysler

  • 18-051-16Status unverified

    PCM flash for MIL with P0101, P0335 and U1424

    2016200 · issued · NHTSA 10076533

    Reprogram the PCM. Only the NHTSA summary was read.

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

Dodge

  • 18-032-16 REV. AStatus unverified

    Flash: powertrain diagnostic and system improvements, U1424

    2016challenger, charger · issued · NHTSA 10129030

    PCM reprogramming for U1424 and throttle position circuit codes. Only the NHTSA summary was read.

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

Ram

  • 18-103-16 REV. BStatus unverified

    Flash: powertrain system improvements, U1424-00 on 2014 and 2015

    2013–20151500 · issued · NHTSA 10121873

    Selective erase and PCM reprogramming. Only the NHTSA summary was read.

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

  • U0402A module received invalid data from the transmission computer

    Same system Supported by vehicle data

    FCA lists U0402 with U1424 in several PCM flash bulletins and a Cherokee owner stored both.

  • P0335Crankshaft position sensor A circuit fault

    Shares causes Supported by vehicle data

    FCA bulletins list P0335 with U1424 and two Ram owners link engine shutoffs to the crankshaft or cam signal.

All Module network (CAN bus) communication codes

U1424 questions

Does U1424 mean the same on other makes?

Not necessarily. This page covers Chrysler, Dodge, Jeep and Ram only; we have not sourced meanings for other makes.

Sources and review

  1. NHTSA complaint ODI 10706492: 2011 Dodge Caliber — NHTSA (owner complaint)
  2. NHTSA complaint ODI 11076602: 2014 Ram 1500 — NHTSA (owner complaint)
  3. FCA 18-035-16 Rev. A (NHTSA 10074933): PCM flash, 2015 Cherokee, DTC U1424 implausible engine torque signal received — NHTSA (manufacturer communication)
  4. NHTSA complaint ODI 11669169: 2015 Ram 1500 — NHTSA (owner complaint)
  5. FCA 18-051-16 (NHTSA 10076533): PCM flash, 2016 Chrysler 200, DTC U1424 — NHTSA (manufacturer communication)
  6. FCA 18-032-16 Rev. A (NHTSA 10129030): PCM flash, 2016 Challenger and Charger, DTC U1424 — NHTSA (manufacturer communication)
  7. FCA 18-103-16 Rev. B (NHTSA 10121873): PCM flash, 2013-2015 Ram 1500 — NHTSA (manufacturer communication)
  8. NHTSA complaint ODI 10733536: 2015 Jeep Cherokee — NHTSA (owner complaint)
Last reviewed
Written by
Saurabh K.
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