P2073
Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Idle
Fuel & air metering
Generic OBD-II
Medium
What it means
P2073 means that at idle the engine computer sees the manifold pressure (MAP) or airflow (MAF) reading disagreeing with the throttle position — the numbers don't add up for a closed throttle. The engine still starts and runs, usually with a rough idle. The most common cause is an intake vacuum leak, followed by a dirty or faulty MAP/MAF sensor or its wiring.
Medium
Can I keep driving? Usually yes, but expect rough idle, hesitation, or occasional stalling. The engine starts and runs; repair it soon to restore smooth idle and correct fueling.
Common symptoms
What you'll notice
- Check-engine light on
- Rough or unstable idle
- Hesitation and reduced power
- Poor fuel economy
Common causes
Most likely first
- Intake manifold vacuum leak (most common)Likely
- Faulty or dirty MAP or MAF sensor giving an implausible readingCommon
- Corroded or damaged MAP/MAF sensor wiring or connectorsCommon
- Dirty or misadjusted throttle body / throttle position signalLess often
- Clogged or disconnected MAP vacuum reference lineLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and compare MAP, MAF, and throttle position live values at idle to spot which signal disagrees.
- Inspect for intake vacuum leaks (hoses, gaskets, PCV) — the most frequent cause.
- Check the MAP/MAF sensor wiring, connectors, and vacuum reference line for damage or blockage.
- Clean the MAF sensor and throttle body; clear any related codes.
- Replace the MAP or MAF sensor if it reads implausibly with good wiring, then re-test at idle.
FAQ
Quick answers
Is it safe to drive with P2073?+
It's usually drivable, but rough idle and possible stalling make it worth fixing quickly, and incorrect fueling hurts economy and emissions.
Can I just clear P2073?+
It returns once the sensors disagree again at idle. Fix the vacuum leak or faulty sensor for a lasting repair.
Related codes
Often seen with P2073
Read & clear P2073 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX