B273C Digital crash input fault stored in the hybrid control processor (Jeep 4xe)

Digital Crash Input fault on Jeep 4xe hybrids

B273C in short

On Jeep 4xe plug-in hybrids, B273C ("Digital Crash Input") is stored in the hybrid control processor and brings up the Service Hybrid warning. FCA says the Jeep may stop entering Electric or Hybrid modes; its bulletins cover high-voltage wiring repairs and software updates. Have a dealer check it soon, and stop driving if power is lost.

On the Wrangler 4xe and Grand Cherokee 4xe, FCA names B273C "Digital Crash Input" and says it is stored or pending in the hybrid control processor (HCP), the computer that runs the plug-in hybrid drive. The code sits in the B (body) range, but the warning, symptoms and fixes FCA describes are all in the hybrid system.

FCA's bulletins show the Service Hybrid Electric Vehicle System warning (sometimes only for a few seconds) and the MIL, and say the Jeep may no longer enter Electric or Hybrid modes. On 2021–2024 Wrangler 4xe, bulletin 08-082-25 repairs the high-voltage cable harness to the power inverter module when B273C appears with U0287, a cold-start shake or noise near the P2 motor. On 2024 Grand Cherokee 4xe models, 08-003-25 reprograms the HCP.

Owners report loss of power with this code. Anything involving the high-voltage system is dealer work.

Pick your make

B273C 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. High-voltage cable harness to the power inverter module (Wrangler 4xe)

    Supported by vehicle data
    Why it ranks here
    FCA's 08-082-25 repairs the high-voltage harness to the power inverter module on 2021–2024 Wrangler 4xe when B273C or U0287 is set, and S2208000154 describes the same shake and P2-motor noise.
    What would change this
    Rises on a Wrangler 4xe with a cold-start shake, noise near the P2 motor or U0287 stored. Falls on a Grand Cherokee 4xe.

  2. Hybrid control processor software (Grand Cherokee 4xe)

    Supported by vehicle data
    Why it ranks here
    FCA's 08-003-25 reprograms the HCP and auxiliary HCP when B273C, P0C19 or P1B03 is set on 2024 Grand Cherokee models.
    What would change this
    Rises if the dealer finds an HCP software update pending. Falls if the software is already current.

What to test first

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

  1. Have the codes read with a scan tool that can reach the hybrid control processor, and note every code stored with B273C.

    Low riskTool: scan tool with hybrid (HCP) access

    • IfB273C with U0287 on a Wrangler 4xe

      It meansFCA's high-voltage wiring bulletin applies.

      Go to step 2

    • IfB273C with P0C19 or P1B03

      It meansFCA's HCP software update bulletin applies.

      Go to step 2

    • IfB273C alone

      It meansFCA's Service Hybrid warning bulletins apply.

      Go to step 2

  2. Give your VIN to a Jeep dealer and ask which B273C bulletin (08-082-25, 08-116-25, 08-003-25 or S2508000084) applies.

    Best left to a shop

    Warning:Do not touch orange high-voltage cables or connectors. High-voltage repairs on the 4xe belong with a trained dealer technician.

Symptoms

  • Service Hybrid Electric Vehicle System warning, sometimes only for a few seconds
  • Jeep will not enter Electric or Hybrid mode
  • Shake on a cold start or noise near the P2 motor (Wrangler 4xe)

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

  • High voltage cable harness to the power inverter module:High-voltage repair: dealer only. Labour 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

  • 2021–2025 · Wrangler

    Supported by vehicle data

    FCA's bulletins cover B273C on the Wrangler 4xe, including a high-voltage harness repair for 2021–2024. Whether they are still current is not verified.

  • 2022–2026 · Grand Cherokee

    Supported by vehicle data

    FCA's bulletins cover B273C on the Grand Cherokee 4xe, including an HCP software update for 2024. Whether they are still current is not verified.

  • 08-082-25Status unverified

    High-voltage wiring repair (B273C-00, U0287-00)

    2021–2024wrangler · issued · NHTSA 11015883

    Repairs the HV cable harness to the power inverter module; symptoms include MIL, shake on a cold start and noise near the P2 motor.

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

  • 08-116-25 REV. CStatus unverified

    Service Hybrid Electric Vehicle System warning (B273C-00)

    2023–2025wrangler · issued · NHTSA 11023578

    B273C-00 stored or pending in the HCP; the Jeep may no longer enter Electric or Hybrid modes.

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

  • S2208000154Status unverified

    Service Hybrid message, cold-start shake and P2 motor noise

    2021–2022wrangler · issued · NHTSA 10225982

    DTCs U0287-00 and B273C-00 with a shake on a cold start and noise near the P2 motor.

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

  • S2508000084Status unverified

    B273C-00 stored in the HCP, Service Hybrid warning and red wrench light

    2022–2026grand-cherokee · issued · NHTSA 11024043

    Grand Cherokee 4xe with B273C-00 in the HCP.

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

  • 08-003-25 REV. AStatus unverified

    Flash: HCP and AHCP updates

    2024grand-cherokee · issued · NHTSA 11019623

    Reprograms the HCP/AHCP (power inverter module) for P0C19, P1B03 or B273C with an intermittent wrench icon.

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

No curated relationships for B273C yet.

All Hybrid and electric drive codes

B273C questions

Is B273C an airbag code on my Jeep 4xe?

Not in practice. FCA's 4xe bulletins store it in the hybrid control processor and pair it with the Service Hybrid warning; the fixes are high-voltage wiring repairs or hybrid software updates.

Sources and review

  1. FCA 08-116-25 REV. C: Service Hybrid Electric Vehicle System warning message (B273C-00 Digital Crash Input) — FCA US LLC ,
  2. FCA S2508000084: B273C-00 Digital Crash Input stored in the HCP, Service Hybrid warning and red wrench light — FCA US LLC ,
  3. FCA 08-082-25: high-voltage wiring repair (B273C-00 Digital Crash Input, U0287-00) — FCA US LLC ,
  4. NHTSA complaint ODI 11678920 (2023 Jeep Grand Cherokee 4xe) — NHTSA Office of Defects Investigation
  5. FCA S2208000154: Service Hybrid message, shake on cold start and noise near the P2 motor, DTCs U0287-00 and B273C-00 — FCA US LLC ,
  6. FCA 08-003-25 REV. A: flash HCP and AHCP updates (P0C19, P1B03, B273C Digital Crash Input) — FCA US LLC ,
  7. NHTSA complaint ODI 11670676 (2023 Jeep Grand Cherokee 4xe) — NHTSA Office of Defects Investigation
Last reviewed
Written by
Saurabh K.
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