P023D

Code

LAND ROVER P — Powertrain

Absolute manifold pressure - turbocharger boost sensor/ compressor A

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 15 EN: 109 RU: 17

AI status

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Page language: EN

Causes

Faulty MAP / turbo boost pressure sensor (compressor A)
Open, shorted, corroded or damaged sensor wiring or connector
Loss of sensor reference voltage or ground (ECU supply issue)
Intake tract leak (vacuum hose, intercooler, charge pipe)
Sticking or malfunctioning turbo wastegate/actuator or variable geometry vanes
Blocked or restricted intake/charge air path (air filter, intercooler, piping)

Symptoms

Engine warning lamp (MIL) or fault light illuminated
Reduced engine power or limp-home mode
Poor or erratic boost response, slow spool or no boost
Surging or fluctuating idle/boost
Poor fuel economy and reduced performance
Hissing intake noise or visible boost leaks

What to check

Read freeze frame and live data with a capable scan tool: MAP/boost value, commanded boost, and related sensors (MAF/MAP, intake temp, turbo actuator position).
Check pending/other related codes (P0106/P0107/P0108, P0234, P0299, P0238/P0239).
Visually inspect MAP sensor connector and wiring for corrosion, damage, or loose pins.
Back-probe sensor connector: verify 5 V reference (or specified reference), ground continuity, and signal voltage.
Inspect intake tract, intercooler, charge pipes and hoses for leaks, loose clamps, or collapsed hoses. Perform smoke test if necessary.
Check turbo actuator/wastegate or VGT mechanism operation and linkage freedom.

Signal parameters

Typical MAP/boost sensor supply: 5 V reference (verify exact value in vehicle wiring manual).
Typical signal voltage range: ~0.5–4.5 V (sensor dependent).
Approximate signal expectations: ~2.4–2.6 V at atmospheric pressure (~101 kPa), lower voltage under vacuum, higher voltage under boost (varies by sensor calibration).
Expected absolute pressure range depends on engine/turbo design; many MAP sensors measure from ~10–350 kPa absolute (check vehicle spec).
Sensor connector usually 3 pins: 5 V ref, signal, ground (confirm with OEM documentation).

Diagnostic algorithm

Retrieve fault details, freeze frame and related codes using a dealer-level or advanced scan tool.
Observe live MAP/boost data at key conditions: key on engine off, idle, and during steady throttle. Compare reported pressure to atmospheric and to commanded boost.
Verify sensor supply and ground at the sensor connector. If reference or ground missing, trace wiring back to ECU and repair.
Check signal continuity between sensor and ECU. Repair any open/short circuits or damaged insulation.
Inspect intake, intercooler and charge-air plumbing for leaks/clamps and perform a smoke test if a leak is suspected.
Confirm turbo actuator/wastegate/VGT movement (apply vacuum/pressure or command actuator with scan tool where possible) and verify turbo produces expected boost with a boost gauge.
If wiring and system checks are good, bench-test the MAP sensor with a calibrated pressure source and compare output to specification; replace sensor if out of tolerance.
After repairs or replacement, clear codes and perform a road test with live data to ensure the fault does not return and boost/pressure values track correctly with throttle demand.
If fault persists after sensor and wiring checks, consult manufacturer technical bulletins and consider ECU testing or reprogramming.

Likely causes

Damaged/contaminated sensor or connector
Open/short in signal wire or poor ground
Intake/charge-air leak or loose hose/clamp
Faulty turbo actuator or wastegate linkage preventing expected boost

Fault status

⚠️ Status

P023D — Absolute manifold pressure / turbo boost sensor (compressor A) circuit: invalid/implausible or out-of-range signal detected. Possible sensor, wiring, or boost system fault.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.5-3.0 hours

Repair manuals

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P023D — Absolute manifold pressure - turbocharger boost sensor/ compressor A