B1112

Code

LAND ROVER B — Body

Park ignition

Brand: LAND ROVER

Type: B — Body

Views: UK: 25 EN: 87 RU: 41

AI status

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Page language: EN

Causes

Faulty park/ignition switch or sensor
Broken, shorted or corroded wiring or connectors in the park/ignition circuit
Poor ground or blown fuse for the ignition/park circuit
Intermittent connector contact / water intrusion
Body Control Module (BCM) or related module internal fault or software error
Aftermarket device or recent repair caused incorrect wiring or damage

Symptoms

Warning lamp or message related to ignition/park on dash
Vehicle may not recognize Park/Key position (won’t start or won’t shift out of park)
Intermittent starting issues or engine crank/no-crank condition
CAN-related errors or multiple body electrical anomalies
Brake/park interlock or shift lock not functioning

What to check

Retrieve freeze-frame data and full module scan with a capable diagnostic tool; note events and related codes
Inspect fuse(s) for ignition/BCM inputs and replace if blown
Visually inspect park/ignition switch connector and wiring for damage, corrosion or water ingress
Check for other related DTCs (BCM, instrument cluster, transmission, immobilizer)
Monitor live data: park switch/ignition input state while operating key and shifter
Wiggle test wiring while watching live data to identify intermittent faults

Signal parameters

Park/ignition switch signal voltage: expected ~0V (off) and ~battery voltage (switched on) at the switch connector
Continuity/resistance across the park/ignition switch terminals when actuated (consult vehicle wiring diagram for expected values)
Power supply to switch: battery voltage present at feed terminal with ignition off/on as specified
Ground continuity from switch and BCM to chassis ground (
BCM reported park/ignition status message on CAN bus (binary state)

Diagnostic algorithm

Use a factory or OE-level scan tool to read B1112 and any related codes; record freeze-frame and static data
Check fuses related to body/ignition circuits; replace any blown fuses and retest
Visually inspect the park/ignition switch, connector and harness for damage, corrosion or water; repair or replace damaged harness/connector
With key removed and ignition off, disconnect connector at the park/ignition switch; check for battery feed and ground at the connector using a DMM
With a helper operate the ignition/key and/or shift to Park while probing the switch signal terminal; verify voltage changes to expected levels (0V ↔ battery voltage)
Perform continuity/resistance check between the switch and BCM connector pins to rule out open circuits or high resistance (unplug both ends)
If wiring and switch check good, monitor the BCM input bit while operating; if BCM never sees the change, consider BCM reflash, module reset, or replacement after confirming wiring
If intermittent only, perform a wiggle test along harness and around connectors while observing live data for dropouts
After repairs, clear codes and perform a road/test cycle to confirm the fault does not return; if persistent, consult wiring diagram and consider module bench tests or professional module repair/replacement

Likely causes

Park/ignition switch failed (mechanical/electrical)
Open or short in harness between switch and BCM
Corroded or loose connector at switch or BCM
Blown ignition/BCM fuse or poor power supply to input circuit
BCM reporting error due to internal fault or lost CAN communication

Fault status

⚠️ Status

BCM reports abnormal or missing park/ignition input signal — circuit fault between park/ignition switch and control module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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B1112 — Park ignition