Powertrain, generic (extended)

P2EB1 Throttle Valve Intake Air Pressure Sensor Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2EB1 says the pressure signal at the throttle inlet is below the lowest valid voltage. These sensors are linear: Ford's transfer curve gives about 0.4 V at 20 kPa and 4.5 V at 300 kPa, so a low voltage reads as an absurdly low pressure. A missing 5 V reference, a signal shorted to ground or a failed sensor are the usual causes. No manufacturer documents P2EB1; for the same sensor under the boost code P0237 GM's 2025 gasoline table 25OBDG03B sets a fault below 14.4 % of 5 V (about 50 kPa) in 320 of 400 samples taken every 12.5 ms, Type A, and Ford below 0.19 V for 5 s. Since boost control relies on this pressure, the engine may limit boost. P2EB2 is the opposite limit.

Likely causes

5 V reference open or shorted, often shared with other sensors
Signal wire shorted to ground
Pressure sensor failed

Symptoms

  • Check engine lamp, often after the first trip
  • Noticeable loss of power under load
  • Pressure reading far below ambient in live data

Repair estimate

DifficultyEasyDIY possible
Parts and labour€50–300
Time0.3–1.5 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

P2EB0P2EB2P2EB3P0237

References: gsi.ext.gm.com, fordservicecontent.com, law.cornell.edu.