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Home / DTC / B2842 — Hall sensor power:SHT to GND

B2842 — Hall sensor power:SHT to GND

Detailed page for trouble code B2842.

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Code

B2842

MITSUBISHI B — Body

Hall sensor power:SHT to GND

Brand: MITSUBISHI
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or chafed wiring harness causing Vcc conductor to contact chassis ground
  • Corroded, bent or contaminated connector pins at the Hall sensor or ECU/module
  • Internal short inside the Hall sensor (sensor Vcc to ground)
  • Faulty control module driver output or short inside the module
  • Water ingress or corrosion at connectors or sensor body after repairs or impact
  • Aftermarket accessories or improper wiring modifications

Symptoms

  • Related sensor or system inoperative (example: wheel speed, cam/crank sensing, blower/actuator depending on sensor application)
  • DTC B2842 stored and malfunction indicator (if applicable) illuminated
  • Intermittent operation or loss of the affected function
  • Fuse for the sensor circuit may be blown repeatedly
  • Low or zero voltage measured at the sensor Vcc pin
  • Possible increased battery drain when circuit short exists

What to check

  • Confirm vehicle manufacturer technical information for exact sensor location and circuit schematic
  • Read DTCs and freeze frame data; record related codes and conditions
  • Visually inspect sensor, connector and wiring for damage, corrosion, loose pins, or evidence of water intrusion
  • Check fuses and fusible links for the related circuit
  • With ignition ON (engine off) measure voltage at the sensor connector Vcc terminal versus chassis ground
  • Measure resistance (or continuity) from the sensor Vcc terminal to chassis ground with harness disconnected (expect very high/OL; low resistance indicates a short)

Signal parameters

  • Sensor supply (Vcc): refer to factory service manual — typically 5 V or 12 V depending on sensor type; expect full reference voltage with key ON
  • Sensor ground: near 0 V (chassis ground) with good connection
  • Sensor signal output (when powered): Hall output is usually a square wave between 0–5 V (or 0–Vcc) with target frequency related to speed/position
  • Resistance Vcc-to-ground (harness disconnected): very high/OL (no continuity). Low resistance (< 5 Ω–100 Ω) indicates a short — consult manual for exact thresholds

Diagnostic algorithm

  1. Retrieve and record DTCs and freeze frame; note when B2842 set and any concurrent codes.
  2. Review wiring diagram/service manual to identify Vcc pin, connector pins, fuses and any protection devices for the Hall sensor circuit.
  3. Visually inspect sensor, connector and harness routing; repair any physical damage or corrosion.
  4. Check the relevant fuse(s). Replace if blown and re-test; a fuse that blows immediately suggests a direct short.
  5. With ignition ON (engine OFF) and sensor connected, measure Vcc at the sensor connector. If Vcc is near 0 V, proceed to step 6.
  6. Disconnect the sensor connector and measure resistance/continuity between the Vcc terminal and chassis ground. Low resistance indicates a shorted harness or module output. If resistance is high, suspect the sensor.
  7. If short persists with sensor disconnected, disconnect harness sections or in-line connectors to isolate which segment contains the short. Repair/replace damaged wiring as found.
  8. If no short is found in harness and connectors, replace the sensor and retest. If DTC remains, bench-test or replace the control module driver only after confirming harness integrity.
  9. After repairs, clear codes, restore connectors, and perform functional verification and road/test conditions to confirm the fault does not return.
  10. If electrical diagnosis is beyond scope, recommend professional workshop with wiring and module test capability.

Likely causes

  • Wiring insulation abrasion where harness rubs on body or suspension components
  • Connector pins pushed out, bent, or filled with corrosion/dirt
  • Failed Hall sensor with internal short between Vcc and ground
  • Shorted module power driver pin due to internal fault or previous overcurrent event
  • Blown or missing inline fuse protecting the sensor circuit

Fault status

⚠️ Status
Hall sensor power circuit shorted to ground (Vcc pulled to GND). Sensor cannot be powered; diagnostic trouble code B2842 stored.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

B2840 B2841 B2843 B2844 P0620
406

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