Vacuum leak from a cracked or disconnected intake hose, intake manifold gasket, or PCV hose; Dirty or contaminated mass air flow (MAF) sensor element; Faulty or clogged manifold absolute pressure (MAP) sensor; Carbon buildup on the throttle body or a sticking throttle plate; Wiring issue such as a chafed wire, corroded connector, or poor ground at any of the three sensors; Failed throttle position (TP) sensor or a misadjusted throttle cable; Engine mechanical issue such as low compression or a worn timing chain affecting vacuum

DTC codes / P20xx · Fuel and air metering and auxiliary emission controls / P2073

P2073Manifold Absolute Pressure / Mass Air Flow - Throttle Position Correlation at Idle

P2073 indicates that the engine control module (ECM) has detected a mismatch between the manifold absolute pressure (MAP) sensor, mass air flow (MAF) sensor, and throttle position (TP) sensor signals when the engine is idling. The ECM expects these three sensors to report a consistent picture of airflow and throttle opening, and this code sets when their readings fall outside the programmed correlation window.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering and auxiliary emission controls

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Rough or unstable idle, sometimes accompanied by slight shaking
Hesitation or stumble when accelerating from a stop
Poor fuel economy or a richer-than-normal exhaust smell
Occasional stalling when coming to a stop or idling for extended periods
Reduced engine power or limp mode in some vehicles

Common causes, most likely first

Vacuum leak from a cracked or disconnected intake hose, intake manifold gasket, or PCV hose
Dirty or contaminated mass air flow (MAF) sensor element
Faulty or clogged manifold absolute pressure (MAP) sensor
Carbon buildup on the throttle body or a sticking throttle plate
Wiring issue such as a chafed wire, corroded connector, or poor ground at any of the three sensors
Failed throttle position (TP) sensor or a misadjusted throttle cable
Engine mechanical issue such as low compression or a worn timing chain affecting vacuum

How to diagnose and fix it

Inspect all intake and vacuum hoses for cracks, loose clamps, or disconnected lines, and repair any leaks found
Clean the mass air flow (MAF) sensor with a dedicated MAF cleaner and allow it to dry completely before reinstalling
Remove and clean the throttle body, including the throttle plate edges, using throttle body cleaner and a soft brush
Use a scan tool to compare live data from the MAP, MAF, and TP sensors at idle and check for erratic or implausible readings
Perform a smoke test on the intake system to reveal hidden vacuum leaks that visual inspection might miss
Check the wiring and connectors at each sensor for corrosion, chafing, or loose pins, and verify reference voltage and ground integrity
If all else checks out, test or replace the sensor that shows the most deviation from expected values, then clear the code and verify the repair with a test drive

Why this code often misleads

A dirty MAF sensor is the most common cause of P2073, yet many technicians replace the MAP sensor first because the code mentions manifold pressure; always clean and verify the MAF before condemning any sensor.
Small vacuum leaks that only appear when the engine is cold or under specific idle conditions can set this code intermittently, so a smoke test performed on a warm engine may miss the leak.
A sticking throttle plate due to carbon buildup can cause the TP sensor to report a slightly open throttle at idle, which the ECM interprets as a correlation error even though the sensor itself is fine.
P2073 can be set by a failing battery or charging system that causes voltage drops, leading to erratic sensor signals; always check battery health and ground connections before diving into sensor replacement.
After repairing the underlying issue, the ECM may need several idle learn cycles or a throttle body relearn procedure before the code stays cleared, so do not assume the repair failed if the light returns immediately.

Can I keep driving with P2073?

You can usually drive the vehicle short distances to a repair shop, but avoid aggressive acceleration, heavy loads, or extended idling because a lean or rich condition may worsen and could damage the catalytic converter over time. If the engine stalls frequently or runs very poorly, stop driving and arrange a tow.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.