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B1318 on Dodge Hornet

Battery Voltage Low

Factory diagnostic protocol and troubleshooting wire for fault code B1318 specifically for the Dodge Hornet (2023–2026, 2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD)).

Verified OEM Telemetry & Field Repair Tree
Dodge Hornet2023–2026
Dodge Hornet
SUV2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD)
Reliability
Sensor Voltage Ref
0.1V – 5.0V Ref
Hornet SAE Mode $01
ECU Network Bus
500 kbps CAN-FD
ISO 15765-4 Compliant
Drivability Status
Drivable (Short Trip)
Medium urgency level
Est. Repair Cost
$80 - $250 (DIY: $0 - $180)
Parts & Labor DIY
Check B1318 On Another Dodge Model:
Diagnose B1318 on Specific Hornet Model Year:

1. Symptoms of B1318 on Dodge Hornet

When the Engine Control Module (ECM/PCM) on your Dodge Hornet (2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD)) logs fault code B1318, drivers commonly observe:

Battery warning light on dash on Dodge Hornet (2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD))
Slow engine cranking or rapid clicking starter on Dodge Hornet (2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD))
Random electrical accessories (radio, power windows) shutting off on Dodge Hornet (2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD))
Multiple U-codes and B-codes stored simultaneously on Dodge Hornet (2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD))
Dodge Hornet OBD-II Port Location
The 16-pin diagnostic connector is located Under driver steering column lower trim. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Dodge Hornet

Historical warranty claims and technical repair bulletins for Dodge Hornet point to the following failure distribution:

55%
Failing 12V automotive battery (sulfated plates or dead cell) (Dodge OEM Part)
25%
Faulty alternator not charging battery (>13.5V) (Dodge OEM Part)
12%
Corroded or loose battery cable terminals (Dodge OEM Part)
8%
Parasitic battery drain drawing power while parked (Dodge OEM Part)
* Source: Synthesized from NHTSA ODI field repair telemetry and verified OEM Technical Service Bulletin (TSB) repair tree frequency percentiles for Dodge Hornet.

3. Step-by-Step DIY Repair Guide for Dodge Hornet

01
Test Battery Open-Circuit Voltage

Measure resting battery voltage with engine off. Normal is 12.6V. If under 12.0V, battery is discharged. on the Dodge Hornet equipped with 2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD).

Required Tool: Digital Multimeter
02
Clean Battery Posts and Terminals

Remove corrosion with baking soda solution and wire brush, tighten terminal clamps firmly. on the Dodge Hornet equipped with 2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD).

Required Tool: Terminal Cleaning Brush, 10mm Wrench
03
Test Alternator Charging Voltage

Start engine and measure voltage across battery. Normal charging voltage is 13.8V to 14.6V. If below 13.0V, alternator has failed. on the Dodge Hornet equipped with 2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD).

Required Tool: Multimeter
04
Replace Battery or Alternator as Indicated

Install new high-CCA AGM or flooded battery, or replace alternator. on the Dodge Hornet equipped with 2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD).

Required Tool: Socket Set, Wrenches
05
Clear Trouble Codes & Reset BMS

Clear DTCs and perform Battery Management System (BMS) reset if equipped. on the Dodge Hornet equipped with 2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD).

Required Tool: OBD-II Scan Tool
Recommended Parts & Testing Tools

Equipment for Diagnosing Dodge Hornet (B1318)

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Dodge Hornet OEM Replacement Sensor

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Direct-fit replacement assembly engineered to OEM tolerances for Dodge Hornet.

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Sensor Signal Voltage Meter

AstroAI Auto-Ranging Digital Multimeter

4.6 / 5.0 (Best Seller)

Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.

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BlueDriver Bluetooth Pro OBDII Scan Tool

4.7 / 5.0 (50,000+ Reviews)

Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.

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Other Common Fault Codes on Dodge Hornet

Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Dodge Hornet:

4. Dodge Hornet B1318 FAQs

What causes code B1318 to trigger on a Dodge Hornet?

On the Dodge Hornet (2.0L Turbo (265HP) / R/T PHEV (288HP / eAWD)), B1318 is most frequently caused by Failing 12V automotive battery (sulfated plates or dead cell) or Faulty alternator not charging battery (>13.5V).

Where is the OBD-II port located on my Dodge Hornet?

On the Dodge Hornet, the 16-pin DLC diagnostic connector is located Under driver steering column lower trim. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.

Can I safely drive my Dodge Hornet with code B1318?

Caution. Low voltage (<10V) causes random module dropouts, flickering dash lights, and stalling. Given that B1318 carries a Medium severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.