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Home / DTC / B1442 — Front engine closure

B1442 — Front engine closure

Detailed page for trouble code B1442.

34,405codes
59brands
11,914generic
22,491specific
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Code

B1442

LAND ROVER B — Body

Front engine closure

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

Causes

  • Faulty front engine/bonnet closure switch (mechanical or electronic)
  • Damaged wiring or connector (open, short to ground, short to battery) in the closure circuit
  • Corroded or contaminated connector or switch contacts
  • Faulty Body Control Module (BCM) or module software issue
  • Physical obstruction or failed latch preventing correct switch operation
  • Aftermarket accessories or recent repairs that disturbed the harness

Symptoms

  • Fault lamp or message for bonnet/engine compartment open/closure
  • Instrument cluster shows incorrect bonnet open/closed status
  • Vehicle may refuse to arm alarms or remote locking if bonnet state is incorrect
  • Interior chime or warning persisted indicating open bonnet
  • Possible related central locking or alarm behavior abnormalities

What to check

  • Scan vehicle with appropriate diagnostic tool and read freeze frame/confirmation data
  • Visually inspect front bonnet/engine closure switch and latch for damage, debris, or misalignment
  • Inspect wiring harness and connector for corrosion, damage, pinched wires or water ingress
  • Check for recent accident/repair work near the bonnet area that could have disturbed components
  • Verify related fuses and BCM grounds are secure

Signal parameters

  • Switch-type sensors typically show continuity to ground when closed (resistance near 0 Ω) and open circuit when open; verify with multimeter
  • Some vehicles use a 5 V reference and signal return: expect ~0 V (ground) when closed and ~5 V (or open-circuit pull-up voltage) when open — consult vehicle-specific data
  • Connector pin voltages: measure reference supply (5 V) and signal with ignition ON, and check continuity to BCM ground

Diagnostic algorithm

  1. Use a scan tool to confirm B1442 and read related faults and live data for the front closure input.
  2. Visually inspect the bonnet latch/sensor and connector for corrosion, damage, or foreign material; clean and reseat connector.
  3. With ignition ON, monitor live data for the closure switch while operating the latch manually to see expected open/closed change.
  4. Backprobe the sensor connector: verify reference voltage (if present), signal voltage, and continuity to module ground. Compare to expected values from manufacturer documentation.
  5. If the sensor is a simple switch, check continuity across the switch while actuating the latch; replace switch if no change or out of spec.
  6. Inspect wiring harness along the route for chafes, pinches or repairs; wiggle-test harness while monitoring signal to reproduce fault.
  7. Repair damaged wiring or replace the switch/latch as required. Clear codes and re-check operation and for reappearance of the fault.
  8. If wiring and sensor check good, perform BCM diagnostics: check BCM grounds and power rails, update software if recommended, and if necessary, test or replace BCM per manufacturer procedures.

Likely causes

  • Failed or dirty bonnet/closure switch
  • Poor connector contact or corrosion at closure switch
  • Broken or pinched wiring between switch and BCM
  • Latch not engaging properly (mechanical)

Fault status

⚠️ Status
Front engine compartment closure circuit — abnormal signal detected (open/short/stuck); check bonnet/closure switch, wiring and BCM.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-1.5 hours

Similar codes

B1440 B1441 B1443 B1444 B1650
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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Code

B1442

MITSUBISHI B — Body

FR curtain ABG squib grounding

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

Causes

  • Faulty front engine/bonnet closure switch (mechanical or electronic)
  • Damaged wiring or connector (open, short to ground, short to battery) in the closure circuit
  • Corroded or contaminated connector or switch contacts
  • Faulty Body Control Module (BCM) or module software issue
  • Physical obstruction or failed latch preventing correct switch operation
  • Aftermarket accessories or recent repairs that disturbed the harness

Symptoms

  • Fault lamp or message for bonnet/engine compartment open/closure
  • Instrument cluster shows incorrect bonnet open/closed status
  • Vehicle may refuse to arm alarms or remote locking if bonnet state is incorrect
  • Interior chime or warning persisted indicating open bonnet
  • Possible related central locking or alarm behavior abnormalities

What to check

  • Scan vehicle with appropriate diagnostic tool and read freeze frame/confirmation data
  • Visually inspect front bonnet/engine closure switch and latch for damage, debris, or misalignment
  • Inspect wiring harness and connector for corrosion, damage, pinched wires or water ingress
  • Check for recent accident/repair work near the bonnet area that could have disturbed components
  • Verify related fuses and BCM grounds are secure

Signal parameters

  • Switch-type sensors typically show continuity to ground when closed (resistance near 0 Ω) and open circuit when open; verify with multimeter
  • Some vehicles use a 5 V reference and signal return: expect ~0 V (ground) when closed and ~5 V (or open-circuit pull-up voltage) when open — consult vehicle-specific data
  • Connector pin voltages: measure reference supply (5 V) and signal with ignition ON, and check continuity to BCM ground

Diagnostic algorithm

  1. Use a scan tool to confirm B1442 and read related faults and live data for the front closure input.
  2. Visually inspect the bonnet latch/sensor and connector for corrosion, damage, or foreign material; clean and reseat connector.
  3. With ignition ON, monitor live data for the closure switch while operating the latch manually to see expected open/closed change.
  4. Backprobe the sensor connector: verify reference voltage (if present), signal voltage, and continuity to module ground. Compare to expected values from manufacturer documentation.
  5. If the sensor is a simple switch, check continuity across the switch while actuating the latch; replace switch if no change or out of spec.
  6. Inspect wiring harness along the route for chafes, pinches or repairs; wiggle-test harness while monitoring signal to reproduce fault.
  7. Repair damaged wiring or replace the switch/latch as required. Clear codes and re-check operation and for reappearance of the fault.
  8. If wiring and sensor check good, perform BCM diagnostics: check BCM grounds and power rails, update software if recommended, and if necessary, test or replace BCM per manufacturer procedures.

Likely causes

  • Failed or dirty bonnet/closure switch
  • Poor connector contact or corrosion at closure switch
  • Broken or pinched wiring between switch and BCM
  • Latch not engaging properly (mechanical)

Fault status

⚠️ Status
Front engine compartment closure circuit — abnormal signal detected (open/short/stuck); check bonnet/closure switch, wiring and BCM.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-1.5 hours

Similar codes

B1440 B1441 B1443 B1444 B1650
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

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Code

B1442

Other B — Body

Door Handle Switch Circuit Failure

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

Causes

  • Faulty front engine/bonnet closure switch (mechanical or electronic)
  • Damaged wiring or connector (open, short to ground, short to battery) in the closure circuit
  • Corroded or contaminated connector or switch contacts
  • Faulty Body Control Module (BCM) or module software issue
  • Physical obstruction or failed latch preventing correct switch operation
  • Aftermarket accessories or recent repairs that disturbed the harness

Symptoms

  • Fault lamp or message for bonnet/engine compartment open/closure
  • Instrument cluster shows incorrect bonnet open/closed status
  • Vehicle may refuse to arm alarms or remote locking if bonnet state is incorrect
  • Interior chime or warning persisted indicating open bonnet
  • Possible related central locking or alarm behavior abnormalities

What to check

  • Scan vehicle with appropriate diagnostic tool and read freeze frame/confirmation data
  • Visually inspect front bonnet/engine closure switch and latch for damage, debris, or misalignment
  • Inspect wiring harness and connector for corrosion, damage, pinched wires or water ingress
  • Check for recent accident/repair work near the bonnet area that could have disturbed components
  • Verify related fuses and BCM grounds are secure

Signal parameters

  • Switch-type sensors typically show continuity to ground when closed (resistance near 0 Ω) and open circuit when open; verify with multimeter
  • Some vehicles use a 5 V reference and signal return: expect ~0 V (ground) when closed and ~5 V (or open-circuit pull-up voltage) when open — consult vehicle-specific data
  • Connector pin voltages: measure reference supply (5 V) and signal with ignition ON, and check continuity to BCM ground

Diagnostic algorithm

  1. Use a scan tool to confirm B1442 and read related faults and live data for the front closure input.
  2. Visually inspect the bonnet latch/sensor and connector for corrosion, damage, or foreign material; clean and reseat connector.
  3. With ignition ON, monitor live data for the closure switch while operating the latch manually to see expected open/closed change.
  4. Backprobe the sensor connector: verify reference voltage (if present), signal voltage, and continuity to module ground. Compare to expected values from manufacturer documentation.
  5. If the sensor is a simple switch, check continuity across the switch while actuating the latch; replace switch if no change or out of spec.
  6. Inspect wiring harness along the route for chafes, pinches or repairs; wiggle-test harness while monitoring signal to reproduce fault.
  7. Repair damaged wiring or replace the switch/latch as required. Clear codes and re-check operation and for reappearance of the fault.
  8. If wiring and sensor check good, perform BCM diagnostics: check BCM grounds and power rails, update software if recommended, and if necessary, test or replace BCM per manufacturer procedures.

Likely causes

  • Failed or dirty bonnet/closure switch
  • Poor connector contact or corrosion at closure switch
  • Broken or pinched wiring between switch and BCM
  • Latch not engaging properly (mechanical)

Fault status

⚠️ Status
Front engine compartment closure circuit — abnormal signal detected (open/short/stuck); check bonnet/closure switch, wiring and BCM.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-1.5 hours

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B1440 B1441 B1443 B1444 B1650
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