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P1393

Wheel Speed Sensor 1, G-Sensor Circuit High Voltage.

  • Chrysler
  • Powertrain
  • Manufacturer code
  • Medium severity

How this code is built

P
SystemPowertrain
1
Defined byThe manufacturer
3
AreaIgnition system or misfire
93
FaultThe specific fault in that area

What it means

P1393 on a Chrysler is listed as Wheel Speed Sensor 1, G-Sensor Circuit High Voltage. The control unit saw the signal voltage from the G-sensor (acceleration or deceleration sensor) linked to wheel speed sensor 1 sitting above its expected range. Which module sets the code, and where the sensor is fitted, depends on the model and year, so confirm this against the vehicle-specific data.

Symptoms

  • Warning lamp on, possibly ABS, traction control or stability control lamps as well as the engine lamp
  • Traction or stability control not working or intervening wrongly
  • ABS may be disabled or behave oddly under braking
  • Speedometer or wheel speed readings erratic or missing on some models
  • Code returns soon after being cleared

Possible causes

  • Damaged, chafed or corroded wiring to the G-sensor or wheel speed sensor 1 circuit, including a short to a voltage supplylikely
  • Corroded, loose or water-damaged connector at the sensor or control unitlikely
  • Faulty G-sensor or wheel speed sensor assembly giving a high outputpossible
  • Open circuit or high resistance in the sensor ground return, which pulls the signal voltage highpossible
  • Low or unstable system voltage from a weak battery or poor charging, upsetting sensor readingspossible
  • Fault inside the control unit that reads the sensorrare

How to diagnose

  1. Read all stored and pending codes from every module and note any related ABS, traction or wheel speed codes
  2. Record freeze frame data and check whether the code is current or history, then clear it and see if it returns
  3. Check battery condition and charging voltage, as low voltage can cause false sensor faults
  4. Inspect the sensor, its wiring and connectors for chafing, corrosion, water ingress, bent pins or previous repair damage
  5. With the sensor connected, view live data for the G-sensor and wheel speed sensor 1 and look for a fixed high reading or erratic values
  6. Check the sensor reference supply, signal and ground at the connector against the manufacturer's wiring diagram and specification for that model
  7. Test the wiring for shorts to voltage and for resistance on the ground and signal wires with the connectors unplugged
  8. Compare readings with a known good sensor or test the suspect part as the model-specific procedure allows

How to fix

  • Repair or replace damaged wiring and restore the correct insulation and routing
  • Clean, re-seat or replace corroded or damaged connectors and terminals
  • Replace the faulty G-sensor or wheel speed sensor 1 assembly, following the model-specific procedure
  • Repair the ground or reference supply fault found during testing
  • Restore correct battery and charging system health if voltage was the problem
  • Replace or reprogram the control unit only after the wiring and sensor are proven good and the manufacturer's procedure calls for it

Can I keep driving?

Medium severity

The car can usually be driven carefully for a short time, but ABS, traction or stability control may not work, so allow extra braking distance and avoid wet or slippery roads. Get it diagnosed soon.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.

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