Is it safe to drive with this code?

Driving with P023D is not generally recommended, as the vehicle may experience reduced power, poor performance and potentially enter limp mode. Extended driving may risk damage to the turbocharger system or engine, though immediate breakdown is uncommon. See our liability disclaimer for full guidance.

P023D may affect your MOT result if the malfunction indicator lamp is illuminated at the time of the test, as an active MIL can constitute a fail under emissions regulations. The outcome depends on the tester's assessment and whether the light is on during inspection — see our MOT disclaimer for details.

Roughly how much does it cost to fix?

Repair costs vary considerably depending on the root cause. Sensor replacement may fall in the low to mid three-figure range for parts and labour, whilst wiring repairs are often low three-figure. If the turbocharger itself requires attention or replacement, costs can reach high three-figure to four-figure territory, particularly at main dealers. Independent garages typically charge less than franchise workshops.

Can a blocked air filter cause this code?

A severely restricted or blocked air filter can potentially contribute to pressure discrepancies in forced induction systems, though it is more commonly associated with performance symptoms rather than directly triggering P023D. Regular air filter maintenance is advisable as part of overall turbo system health.

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← All fault codes | Electrical & Sensors

P023D

Powertrain

Manifold Absolute Pressure - Turbocharger/Supercharger Boost Sensor A Correlation

The engine control module has detected a mismatch between pressure readings from the manifold absolute pressure sensor and the turbocharger or supercharger boost sensor, indicating the sensors may be reporting conflicting data.

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ⓘ Information only. This page provides general educational information about fault code P023D. We do not assess the urgency or safety implications of any specific fault. That requires in-person diagnosis by a qualified mechanic. Full terms.

Recommended next steps

Whether a fault is urgent, drivable, or routine depends entirely on the cause on a specific vehicle, and that can only be determined by a qualified mechanic with diagnostic equipment. If a warning light is illuminated, the most reliable next step is professional diagnosis.

What does P023D mean?

P023D is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Manifold Absolute Pressure - Turbocharger/Supercharger Boost Sensor A Correlation.

This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

About Electrical & Sensors codes

Codes in the Electrical & Sensors category.

P023D is one of 4,010 codes in this category. Browse all Electrical & Sensors codes →

What we know about P023D specifically

We record the SAE J2012 standardised definition and the system this code belongs to, but we have not yet published detailed driver-reported symptoms, common causes, or step-by-step diagnostic guidance for P023D.

Rather than invent that information by generating generic content from a template, we leave it out. For specific guidance, the most reliable sources are:

•your vehicle's own service manual or manufacturer-specific technical bulletins
•a qualified mechanic with a manufacturer-level diagnostic tool
•a marque specialist familiar with your make and model

Codes nearby

Codes adjacent to P023D in the P-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

P023A Charge Air Cooler Coolant Pump Control Circuit Open

P023B Charge Air Cooler Coolant Pump Control Circuit Low

P023C Charge Air Cooler Coolant Pump Control Circuit High

P023E Manifold Absolute Pressure - Turbocharger/Supercharger Boost Sensor B Correlation

P023F Fuel Pump Secondary Circuit/Open

P0240 Turbocharger/Supercharger Boost Sensor "B" Circuit Range/Performance

Other Electrical & Sensors codes

Other fault codes in the same system as P023D. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

B1257

Air Temperature External Sensor Circuit Short To Ground Detailed guide

B1363

DBPT Circuit Short To Ground Detailed guide

B2100

Ignition Run/Start Input Circuit Performance Detailed guide

C2000

Steering Angle Sensor Not Calibrated Detailed guide

P0030

HO2S Heater Control Circuit (Bank 1 Sensor 1) Detailed guide

P0031

Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) Detailed guide

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with P023D can submit a correction or expansion. We review every submission before publishing, mechanic submissions are prioritised.

Information only, not professional advice

The information on this page is provided for general guidance and educational purposes only. It is not a substitute for diagnosis or repair advice from a qualified mechanic. Always verify any fault before paying for repairs. carfaultcodes.co.uk accepts no liability for decisions made based on this information. Full terms →

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