Powertrain, generic (extended)

P2EA2 Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 6

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2EA2 says the signal of the sixth bank 1 exhaust probe sits above its upper electrical limit. Which temperature that implies depends on the element. Most probes form a voltage divider with a pull-up resistor in the module; an open lead then drives the input to the reference, which an NTC part reads as extreme cold and a platinum (PTC) part as extreme heat. Heraeus notes that both platinum resistors and thermocouples are used beyond 900 °C. No maker documents P2EA2; the closest public analogue is GM's probe 5 code P2482 in 25OBDG04A: more than 100 MΩ, or above about 1290 °C on a digital thermocouple, in 19 of 25 samples, Type A with the lamp after one trip. An unplugged connector or broken lead is therefore the prime suspect.

Likely causes

Open signal or ground lead, or connector not latched
Probe element burnt open after overheating or vibration
Signal wire shorted to the 5 V reference or battery voltage

Symptoms

  • Check engine lamp, often after a single trip
  • Probe 6 shows an impossible extreme value in live data
  • Filter regeneration or SCR dosing restricted

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–550
Time0.5–2 h

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

Parts involved

exhaust gas temp sensor b1 s6wiring harnessecm

Related codes

P2EA1P2EA3P2EA5P2482

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