B11A0

Code

LAND ROVER B — Body

Left side restriction pressure sensor

Brand: LAND ROVER

Type: B — Body

Views: UK: 20 EN: 31 RU: 20

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Failed/defective left-side restriction pressure sensor
Wiring fault: open, short to ground or short to voltage in sensor circuit
Poor or corroded connector or pin(s)
Blocked or restricted filter (DPF, catalyst or intake/exhaust port) producing abnormal pressure
Vacuum/pressure line leak, blockage, or kink (if sensor uses tubing)
ECU/module fault (less common)

Symptoms

Malfunction indicator lamp (MIL) or service light illuminated
DPF regeneration failures or inhibited regen
Reduced engine power or limp mode on some vehicles
Increased fuel consumption or excessive smoke from exhaust
Stored related fault codes and possible limp-home strategies

What to check

Read stored and pending codes and freeze frame with a capable scan tool; capture live data for pressure sensor
Visually inspect sensor, connector, wiring harness and any pressure/vacuum tubing for damage or contamination
Check for signs of soot ingress, oil or water contamination at sensor or tubing
Backprobe sensor connector and measure reference voltage, ground and signal with a multimeter or oscilloscope
Measure sensor output vs. known pressure (or compare to right-side if available)
Inspect DPF/exhaust system for soot build-up, soot load and physical restrictions

Signal parameters

Reference voltage typically ~5 V (check OEM spec) with sensor signal commonly 0.5–4.5 V proportional to differential pressure
Typical differential pressure range often 0–500 mbar (varies by model); some sensors use 0–1000 mbar range
Sensor impedance/resistance should match OEM spec (measure with service data)
Signal should change smoothly with applied pressure; abrupt jumps, stuck value or no change indicate fault
Ground continuity to chassis ground should be near 0 Ω

Diagnostic algorithm

Retrieve full fault data with a diagnostic scan tool: read B11A0, any related codes and freeze frame values.
Monitor live sensor data while key ON and during engine run/regeneration: confirm sensor is producing a plausible, changing signal.
Visual inspection: check connector pins, wiring harness for heat damage, corrosion, chafing, and inspect pressure tubing for kinks or disconnection.
Measure reference voltage and ground at the sensor connector (key ON). Confirm proper reference (usually ~5 V) and a good ground.
Backprobe signal wire and measure voltage while applying known pressure (or compare to other bank). Use a hand pump/pressure source if available.
If signal is out of range or absent, wiggle test wiring while observing live data to detect intermittent faults.
Check continuity and resistance of wiring from sensor to ECU; repair any opens/shorts.
Inspect and, if necessary, clean or remove the filter (DPF) or related restriction and check for permanent damage or extreme soot load.
If wiring and installation are good but sensor output is incorrect, replace the left-side restriction pressure sensor with OEM part.
Clear codes, perform regeneration as required, and road test to confirm fault does not return. Re-scan for related codes.

Likely causes

Sensor hardware failure
Connector corrosion or loose connection
Clogged/sooted diesel particulate filter (high differential pressure)
Damaged or disconnected pressure tubing/hose
Wiring short or open between sensor and control module

Fault status

⚠️ Status

Left-side restriction pressure sensor: circuit/performance or range fault. Check sensor, wiring, connector, and associated filter for restriction.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0 - 3.0 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