B2807

Code

LAND ROVER B — Body

Pressure sensor signal - short circuit to battery voltage

Brand: LAND ROVER

Type: B — Body

Views: UK: 14 EN: 16 RU: 18

AI status

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Page language: EN

Causes

Damaged wiring harness with insulation chafed to battery positive
Corroded or contaminated sensor connector pins causing a high-voltage path
Failed pressure sensor with internal short to battery
Aftermarket accessory or repaired circuit inadvertently tied to B+
Poor or missing sensor ground causing abnormal circuit behavior
Faulty control module (rare)

Symptoms

Malfunction indicator or warning lamp for the affected system
Erroneous or fixed high pressure reading on scan tool/live data
Related system inoperative or in limp mode (example: air suspension, brake/vacuum pressure, HVAC pressure control — depending on vehicle)
Possible stored multiple related DTCs

What to check

Read and record freeze frame and freeze data with an appropriate scan tool
Inspect wiring and connector at the pressure sensor for damage, corrosion, bent pins, or water intrusion
Visually trace harness for rubbing, heat damage, or recent repair splices
Backprobe the sensor connector and measure signal voltage with ignition ON (engine off)
Measure resistance/continuity between the signal circuit and battery positive to check for a short
Perform wiggle test on harness while watching live data for intermittent changes

Signal parameters

Sensor supply: vehicle battery voltage ~11–14 V (switched or fused feed)
Signal nominal range (typical for many pressure sensors): ~0.5–4.5 V (varies by sensor)
Short-to-battery condition: signal line near battery voltage (~11–14 V) when it should be within the sensor’s output range
Reference: sensor ground should be near 0 V

Diagnostic algorithm

Connect an OEM-capable scan tool, read all stored codes and freeze frame data; note which subsystem is affected
Clear the code, then see if it returns to confirm reproducibility
Perform thorough visual inspection of the sensor, connector, and harness: look for corrosion, bent pins, crushed wires, heat damage, or evidence of water entry
With ignition ON (engine off), backprobe the sensor connector: measure signal pin voltage. If the signal is near battery voltage with the sensor connected, suspect a short to B+. If the signal is normal with the sensor connected, problem may be intermittent or sensor-dependent
Disconnect the sensor and measure voltage on the harness signal wire. If the signal wire still reads battery voltage with the sensor unplugged, the short is upstream in the vehicle wiring; trace wiring toward the module and inspect for chafing or contact with B+
Measure resistance between the signal wire and battery positive with ignition OFF. Very low resistance indicates a direct short; pinpoint by disconnecting sections or removing harness clips until continuity is lost
If wiring/harness checks clear, replace the pressure sensor and retest. Use known-good OEM or equivalent sensor
If issue persists after sensor replacement and wiring repairs, test or substitute the control module input (follow factory procedures) — consider module repair or reprogramming as last resort
After repairs, clear codes, perform functional check and road/operation test to confirm fault does not return

Likely causes

Connector pin corrosion or pushed-out terminal allowing contact with B+
Wiring insulation abrasion where harness contacts a chassis or hot component
Failed sensor that internally shorts the signal to battery voltage
Water intrusion at connector

Fault status

⚠️ Status

High voltage detected on pressure sensor signal circuit (short to battery). Control module has stored a B2807 fault and has disabled/flagged the affected system.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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B2807 — Pressure sensor signal - short circuit to battery voltage