Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / P023D — Manifold Absolute Pressure - Turbocharger/Supercharger Boost Sensor A Correlation

P023D — Manifold Absolute Pressure - Turbocharger/Supercharger Boost Sensor A Correlation

Detailed page for trouble code P023D.

34,405codes
59brands
11,914generic
22,491specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

P023D

Generic P — Powertrain

Manifold Absolute Pressure - Turbocharger/Supercharger Boost Sensor A Correlation

Brand: Generic
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty MAP or turbo/supercharger boost sensor (A)
  • Damaged or corroded sensor connector or wiring (open, short to power/ground, high resistance)
  • Vacuum or boost leaks (intake tract, intercooler, hoses, clamps)
  • Sticking or misadjusted wastegate or turbo actuator
  • Faulty MAF, TPS or other related sensor providing incorrect reference data
  • ECU/PCM software error or internal fault

Symptoms

  • Check Engine Light (MIL) illuminated; stored P023D
  • Reduced engine power or limp-home mode
  • Poor acceleration, hesitation or surging under boost
  • Intermittent boost pressure readings or no boost indicated on scan tool
  • Whistling or hissing from intake/intercooler area (possible leaks)
  • Unusual turbo behavior (overboost or underboost)

What to check

  • Read freeze frame and live data with a scan tool (MAP, boost, MAF, RPM, TPS, commanded vs actual wastegate position)
  • Visually inspect MAP/boost sensor, connector and wiring for damage or corrosion
  • Check reference voltage (usually 5 V) and ground at the sensor connector with ignition ON (engine off)
  • Compare MAP/boost sensor voltage to expected range at key ON and at idle
  • Perform smoke test or pressure/vacuum test on intake and intercooler plumbing to find leaks
  • Inspect turbo actuator, wastegate and vacuum lines for proper operation and binding

Signal parameters

  • Reference voltage to sensor: typically ~5.0 V (verify factory spec)
  • Signal voltage range: commonly ~0.5–4.5 V corresponding to low to high pressure (verify spec for vehicle)
  • Expected relationship: MAP/boost should track manifold pressure changes with throttle/RPM and agree with commanded boost/wastegate position
  • At key ON/engine OFF MAP should approximate ambient/barometric pressure (scan tool baro vs MAP)
  • Under acceleration MAP/boost signal should rise smoothly; sudden drop or erratic values indicate leak or sensor/wiring fault

Diagnostic algorithm

  1. Retrieve freeze frame, all stored/related DTCs and review live sensor data (MAP, boost, MAF, TPS, RPM).
  2. With ignition ON (engine off) backprobe sensor connector: confirm reference voltage and ground continuity to ECU. Document voltages.
  3. Start engine and monitor MAP/boost vs RPM and throttle: look for expected changes and compare to commanded boost or MAF-derived expectations.
  4. Inspect harness and connector: wiggle test while monitoring live data to detect intermittent opens/shorts. Repair damaged wiring or connectors.
  5. Perform intake system pressure/vacuum test or smoke test to locate leaks in hoses, intercooler, and between turbo and manifold. Repair leaks and retest.
  6. Check turbo actuator/wastegate movement (manually or with a hand vacuum pump / scan tool command). Verify it follows commands and is not stuck.
  7. If wiring and mechanical systems good, swap MAP/boost sensor with a known good unit (if available) or bench-test sensor per manufacturer procedure. Replace if out of spec.
  8. Clear codes and road-test under load while monitoring live data. Confirm code does not return and boost/MAP correlation is restored.
  9. If fault persists after sensors and plumbing verified, consider ECU/PCM fault—verify ECU grounds and power supply; consult manufacturer technical service information before ECU replacement.

Likely causes

  • Contaminated or failed boost/MAP sensor
  • Wiring harness damage between sensor and ECU (chaffing, rodent damage)
  • Intake system leak between turbo and manifold or intercooler
  • Faulty turbo actuator/wastegate causing unexpected boost
  • Loose or corroded ground or reference voltage supply

Fault status

⚠️ Status
MAP - Turbo/Supercharger Boost Sensor A Correlation: PCM detected inconsistent or non‑correlating readings between the MAP and boost sensor A; check sensors, wiring, intake leaks, and boost control components.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P0106 P0107 P0108 P0234 P0299
9,407

The library contains 9,407 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.

ALFA ROMEO
89
AUDI
1,243
BMW
479
CADILLAC
206
CHEVROLET
456
CHRYSLER
193
DAEWOO
75
FIAT
26
GENESIS
207
HUMMER
138
HYUNDAI
371
ISUZU
64
KIA
155
LAND ROVER
320
LEXUS
280
LINCOLN
166
MERCEDES-BENZ
856
MERCURY
296
MITSUBISHI
406
PORSCHE
136
TESLA
58
TOYOTA
2,209
TRIUMPH
131
VOLKSWAGEN
626
VOLVO
221
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P023D

LAND ROVER P — Powertrain

Absolute manifold pressure - turbocharger boost sensor/ compressor A

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty MAP or turbo/supercharger boost sensor (A)
  • Damaged or corroded sensor connector or wiring (open, short to power/ground, high resistance)
  • Vacuum or boost leaks (intake tract, intercooler, hoses, clamps)
  • Sticking or misadjusted wastegate or turbo actuator
  • Faulty MAF, TPS or other related sensor providing incorrect reference data
  • ECU/PCM software error or internal fault

Symptoms

  • Check Engine Light (MIL) illuminated; stored P023D
  • Reduced engine power or limp-home mode
  • Poor acceleration, hesitation or surging under boost
  • Intermittent boost pressure readings or no boost indicated on scan tool
  • Whistling or hissing from intake/intercooler area (possible leaks)
  • Unusual turbo behavior (overboost or underboost)

What to check

  • Read freeze frame and live data with a scan tool (MAP, boost, MAF, RPM, TPS, commanded vs actual wastegate position)
  • Visually inspect MAP/boost sensor, connector and wiring for damage or corrosion
  • Check reference voltage (usually 5 V) and ground at the sensor connector with ignition ON (engine off)
  • Compare MAP/boost sensor voltage to expected range at key ON and at idle
  • Perform smoke test or pressure/vacuum test on intake and intercooler plumbing to find leaks
  • Inspect turbo actuator, wastegate and vacuum lines for proper operation and binding

Signal parameters

  • Reference voltage to sensor: typically ~5.0 V (verify factory spec)
  • Signal voltage range: commonly ~0.5–4.5 V corresponding to low to high pressure (verify spec for vehicle)
  • Expected relationship: MAP/boost should track manifold pressure changes with throttle/RPM and agree with commanded boost/wastegate position
  • At key ON/engine OFF MAP should approximate ambient/barometric pressure (scan tool baro vs MAP)
  • Under acceleration MAP/boost signal should rise smoothly; sudden drop or erratic values indicate leak or sensor/wiring fault

Diagnostic algorithm

  1. Retrieve freeze frame, all stored/related DTCs and review live sensor data (MAP, boost, MAF, TPS, RPM).
  2. With ignition ON (engine off) backprobe sensor connector: confirm reference voltage and ground continuity to ECU. Document voltages.
  3. Start engine and monitor MAP/boost vs RPM and throttle: look for expected changes and compare to commanded boost or MAF-derived expectations.
  4. Inspect harness and connector: wiggle test while monitoring live data to detect intermittent opens/shorts. Repair damaged wiring or connectors.
  5. Perform intake system pressure/vacuum test or smoke test to locate leaks in hoses, intercooler, and between turbo and manifold. Repair leaks and retest.
  6. Check turbo actuator/wastegate movement (manually or with a hand vacuum pump / scan tool command). Verify it follows commands and is not stuck.
  7. If wiring and mechanical systems good, swap MAP/boost sensor with a known good unit (if available) or bench-test sensor per manufacturer procedure. Replace if out of spec.
  8. Clear codes and road-test under load while monitoring live data. Confirm code does not return and boost/MAP correlation is restored.
  9. If fault persists after sensors and plumbing verified, consider ECU/PCM fault—verify ECU grounds and power supply; consult manufacturer technical service information before ECU replacement.

Likely causes

  • Contaminated or failed boost/MAP sensor
  • Wiring harness damage between sensor and ECU (chaffing, rodent damage)
  • Intake system leak between turbo and manifold or intercooler
  • Faulty turbo actuator/wastegate causing unexpected boost
  • Loose or corroded ground or reference voltage supply

Fault status

⚠️ Status
MAP - Turbo/Supercharger Boost Sensor A Correlation: PCM detected inconsistent or non‑correlating readings between the MAP and boost sensor A; check sensors, wiring, intake leaks, and boost control components.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P0106 P0107 P0108 P0234 P0299
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 :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .