Powertrain, generic (extended)

P2A0E Manifold Absolute Pressure Sensor B Circuit Intermittent/Erratic

Check engine lightUsually off
EmissionsRelevant
Drive cycleNot required
Limp modeNo

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.

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

Symptoms

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

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–250
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

map sensor bwiring harnessecm

Related codes

P2A0AP2A0BP2A0CP2A0DP0109

References: law.cornell.edu, gsi.ext.gm.com, newtonnet.co.uk.