B12A7

Code

LAND ROVER B — Body

Steering Column Tilt Sensor A

Brand: LAND ROVER

Type: B — Body

Views: UK: 11 EN: 115 RU: 18

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Open or short in wiring between sensor and control module
Poor or corroded connector at sensor or control module
Damaged or failed steering column tilt sensor (sensor A)
Incorrect sensor calibration or software fault
Intermittent power or ground supply to the sensor
Related module communication fault

Symptoms

Steering column tilt memory not working or incorrect position
Warning lamp or message related to steering or driver assist systems
Adaptive steering/steering-angle dependent systems may behave incorrectly or be disabled
Stored fault code and possible limp or degraded functionality for related systems
Intermittent loss of tilt input (may change with column movement)

What to check

Scan for freeze-frame data and related codes; note when the fault occurs
Visually inspect sensor connector and wiring for damage, corrosion, or loose pins
Check for proper power and ground at the sensor connector with ignition on
Backprobe sensor signal while moving column to confirm output changes
Check continuity and resistance of wiring between sensor and control module
Check for related network/communication codes that could affect the sensor data

Signal parameters

Typical sensor supply: 5 V reference (verify with vehicle-specific data)
Typical signal output: variable voltage proportional to tilt angle (commonly 0.1–4.9 V range) — verify exact range in service data
Expected idle/rest signal around mid-scale (often ≈2.5 V) depending on column position
Resistance or angle values will change smoothly as column is moved; abrupt jumps indicate fault
Communication-type sensors may transmit angle data over network (check module data values)

Diagnostic algorithm

Read all stored codes and freeze-frame data. Note if other modules report steering/angle faults.
Clear codes and perform a test drive or move the steering column through full tilt range to attempt to re-create the fault.
With ignition on, inspect the sensor connector for corrosion, bent pins, damaged seals, or water ingress; repair or clean as needed.
Confirm sensor power and ground at the connector (measure reference voltage and ground continuity). If missing, trace and repair fuse/relay or ground.
Backprobe the signal wire and monitor voltage while moving the column. Signal should vary smoothly; spikes, drops to 0 V, or fixed values indicate wiring or sensor failure.
Check continuity and insulation of wiring from sensor to the receiving module; look for shorts to ground or battery and intermittent opens (wiggle test).
If wiring and connectors are good, compare live sensor values with expected ranges from factory wiring diagrams/service data. If out of range, replace the sensor.
After replacement, perform required calibration/initialization using a compatible diagnostic tool per manufacturer procedure.
Re-scan for codes and verify repairs by cycling ignition and operating tilt memory/related systems. Monitor for reappearance of B12A7.
If fault persists, inspect the receiving control module and wiring harness grounds; consider module reprogramming or professional diagnostic support.

Likely causes

Faulty tilt sensor on the steering column (mechanical wear or internal failure)
Bent pin, water ingress, or corrosion at the sensor connector
Chafed wiring harness causing intermittent short to ground or battery
Module requiring reprogramming or calibration after replacement/repair

Fault status

⚠️ Status

Steering Column Tilt Sensor A - Signal/Range Fault Detected

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

Repair manuals

Manual library for LAND ROVER

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

Your experience will help others

+100 karma for a short comment :)

Was this AI description helpful?

Your feedback helps improve AI descriptions.

👍 Like 0 👎 Dislike 0

Send to email