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C12342018 Model Year TelemetryHigh Severity

C1234 on 2018 Chrysler 300

Right Front Wheel Speed Sensor Input Signal Missing

Technical troubleshooting wire for fault code C1234 specifically tailored for the 2018 Chrysler 300. Includes wiring sensor pinouts, freeze frame PID parameters, and step-by-step diagnostic tree.

2018 Engine Control Module (ECM) Specific Calibration
Chrysler 3002018 300
2018 Chrysler 300
Sedan • 3.6L Pentastar V6 (292HP) / 5.7L / 6.4L 392 HEMI V8 (485HP SRT8)
2018 Stats
Vehicle
2018 300
3.6L Pentastar V6 (292HP) / 5.7L / 6.4L 392 HEMI V8 (485HP SRT8)
ECU Subsystem
Automotive OBD-II
SAE Mode $01 & $02
Est. Repair Cost
$90 - $280
OEM Parts & DIY
Urgency Level
High
Drivable (Short)
Switch 300 Model Year for C1234
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Common 2018 300 Symptoms

  • ABS and Traction lights on

Likely Root Causes on 2018 300

  • Defective Right Front ABS wheel speed sensor
  • Damaged harness
  • Dirty tone ring

Step-by-Step Fix Protocol for 2018 Chrysler 300

Step 1: Scan & Record Freeze Frame Data

Connect an OBD-II scanner to the DLC port under the driver dashboard. Record engine RPM, Short Term / Long Term Fuel Trim (STFT/LTFT), and engine coolant temperature at the moment C1234 set.

Step 2: Inspect Wiring Harness & Pin Voltages

Inspect the sensor connector on the 2018 300 engine bay. Use a multimeter to verify reference voltage (5.0V / 12.0V) and ground continuity.

Step 3: Component Replacement & PCM Reset

Replace the verified defective component using OEM or equivalent grade parts. Clear DTC C1234 and complete an EPA drive cycle to verify readiness monitors set to READY.

Recommended Parts & Testing Tools

Equipment for Diagnosing 2018 Chrysler 300 (C1234)

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2018 Chrysler 300 OEM Replacement Sensor

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Direct-fit replacement assembly engineered to OEM tolerances for 2018 Chrysler 300.

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Sensor Signal Voltage Meter

AstroAI Auto-Ranging Digital Multimeter

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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

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

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