P2A0E: Manifold Absolute Pressure Sensor B Circuit Intermittent/Erratic

P2A0E flags a MAP B signal that jumps or drops out for short moments instead of failing for good. No manufacturer documents P2A0E publicly; GM's LT6 tables, the only public description of a sensor B, cover just its low, high and plausibility faults. The logic therefore follows the intermittent code of sensor A, P0109: Ford's 2012 summary sets it without MIL when the voltage briefly falls below 0.024 V or rises above 4.96 V, judged over 2 s, and another Ford strategy counts ten excursions beyond the limits in one drive cycle. Loose terminals, a chafed harness or moisture in the connector are the usual culprits, and the fault often comes and goes with vibration or temperature. The engine may stumble or hesitate during the dropouts.

Symptoms

• Intermittent stumble or hesitation
• Fault comes and goes, warning light depending on manufacturer

Most likely causes

• Loose or widened terminal in the sensor B connector
• Harness chafing on engine parts, intermittent short or open
• Moisture or corrosion in the connector

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the connector and the pressure port
2. Gently move the wiring with the engine running and watch whether the reading changes.
3. With the engine off, compare the reading with the atmospheric pressure from the barometric sensor
4. Watch how it changes when starting and accelerating
5. Clean it with a suitable product, or replace it if it does not respond

Good to know

• Repair difficulty: medium
• It affects emissions.

What each character of P2A0E means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• A: Hybrid or air and fuel
• 0E: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2A0E?

You can drive with caution to a repair shop. Avoid demanding power if the car is in limp mode.

What causes code P2A0E?

The most common causes are: loose or widened terminal in the sensor B connector; harness chafing on engine parts, intermittent short or open; moisture or corrosion in the connector.

Related codes

• P2A0AManifold Absolute Pressure Sensor B Circuit
• P2A0BManifold Absolute Pressure Sensor B Circuit Range/Performance
• P2A0CManifold Absolute Pressure Sensor B Circuit Low
• P2A0DManifold Absolute Pressure Sensor B Circuit High
• P0109Manifold Absolute Pressure/Barometric Pressure Sensor Circuit Intermittent

Sources

• law.cornell.edu: 13 CCR 1968.2
• gsi.ext.gm.com: 24OBDG07
• newtonnet.co.uk: fordobd2012

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.