Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance
What it means
The engine computer compares the manifold absolute pressure (MAP) reading with the value expected from engine speed and throttle position. When the reading does not change as it should or does not match expectations, this code is set; the cause is often the sensor hose or an air leak rather than the wiring.
Symptoms4
- Check engine light on.
- Rough or unstable idle.
- Weak acceleration or hesitation.
- Higher fuel consumption.
Possible causes6
- Cracked, blocked or disconnected vacuum hose to the sensor, on cars that use one.
- Vacuum leak from hoses or the intake manifold gasket.
- Sensor port blocked with carbon or oil.
- Failed or slow-responding pressure sensor.
- EGR valve stuck open, raising manifold pressure.
- Low engine vacuum from a mechanical issue such as incorrect timing (less common).
How to diagnose5
- Compare the engine-off reading with the expected atmospheric pressure, then watch it drop at idle and rise when the throttle opens.
- Inspect the sensor hose and port for cracks or blockage.
- Have a smoke test done on the intake manifold.
- Measure vacuum with a mechanical gauge and compare it with the sensor reading.
- Make sure the EGR valve closes fully at idle.
How to fix6
- Replace a cracked sensor hose or clear a blocked one.
- Repair vacuum hose or intake gasket leaks.
- Clean carbon from the sensor port.
- Clean or replace the EGR valve if it is stuck open.
- Replace the pressure sensor if its reading does not match the vacuum gauge.
- Clear the codes and confirm the sensor reading changes logically with engine speed.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
The fix is often a cheap vacuum hose or a port cleaning; the cost rises when the sensor is replaced or the EGR valve needs work.
Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026
Frequently asked questions
Does this code mean the sensor is bad?
Not always. The sensor may read the real pressure correctly while the problem is its hose, a vacuum leak or the EGR valve, so check those first.
Does altitude affect this code?
The sensor is designed to handle altitude changes, but comparing its engine-off reading with the expected air pressure for your area is a useful way to check it.
This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.
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