Powertrain, generic (extended)

P2EB2 Throttle Valve Intake Air Pressure Sensor Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2EB2 is stored when the throttle inlet pressure signal exceeds its upper limit. Since voltage climbs with pressure, the module would read a boost no charger can deliver. Electrically this points to a signal wire touching the 5 V reference or battery voltage, or to an open sensor ground that lets the output float up. No manufacturer documents P2EB2 publicly. GM files the high fault of its TIAP sensor under P0238 and sets it above 85.8 % of 5 V, about 371 kPa, again 320 of 400 samples and Type A; Ford's throttle inlet sensor fails above 4.88 V for 5 s. GM's patent US8090522 shows that the throttle controller works directly with this pressure, sampled every 12.5 ms, so a wrong value disturbs throttle control. P2EB1 is the low limit.

Likely causes

Open sensor ground or corroded ground pin
Signal wire shorted to 5 V reference or battery voltage
Pressure sensor failed high

Symptoms

  • Check engine lamp, often after the first trip
  • Boost limited, sluggish response
  • Pressure reading far above ambient with the engine off

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

P2EB0P2EB1P2EB3P0238

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