Powertrain, generic (extended)

P2EB3 Throttle Valve Intake Air Pressure Sensor Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2EB3 covers a throttle inlet pressure that is electrically fine but wrong. With the engine stopped, the pressure ahead of the throttle must equal manifold and barometric pressure; Ford checks this at key-up after at least 10 s off, allowing about 2.7 inHg between boost and manifold sensor. While running, GM compares its TIAP reading with an airflow model and fails it if the gap exceeds 30 kPa, reported as P0236. Nira Automotive's patent US5083434 shows why the value matters: the pressure drop across the throttle can replace the throttle angle when setting the boost target. No manufacturer documents P2EB3 publicly. Typical causes are a sensor drifting with age, a blocked or iced port, or a charge air leak that drags the model apart.

Likely causes

Sensor offset or drift with age
Pressure port blocked by oil residue or ice
Leak in the charge air path upsetting the model comparison
Contact resistance in the connector

Symptoms

  • Check engine lamp on
  • Pressure reading differs from manifold and barometric pressure with engine off
  • Uneven boost or reduced power

Repair estimate

DifficultyMediumDIY possible
Parts and labour€50–400
Time0.5–2 h

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

Parts involved

throttle valve intake air pressure sensorwiring harnessecm

Related codes

P2EB0P2EB1P2EB2P0236P2227

References: fordservicecontent.com, gsi.ext.gm.com, image-ppubs.uspto.gov, law.cornell.edu.