Powertrain, generic (extended)

P2032 Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 2)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2032 means the signal of exhaust gas temperature sensor 2 on bank 1 is below its valid range. What that means electrically depends on the sensor type. On the Opel/GM 2.0 CDTi in the Saab 9-5 (2010) sensor 2 sits in the particulate filter and its voltage falls as it gets hotter, so a reading below 0.4 V for more than 1 s points to a short to ground; the code is Type A there. GM's 2009 Duramax uses the opposite characteristic and fails below 0.307 V, equivalent to -40 °C, for 300 s, which is typical of an open or grounded signal. GM's 2018 diesels compare against a resistance-equivalent limit below 142 Ω as a Type B code, Ford's 2023 diesels against 0.10 V within 2 s. So check the wiring diagram before deciding whether low means a short or an open. Without the sensor the ECM cannot control filter temperature and usually blocks regeneration.

Likely causes

Signal wire chafed to ground on the exhaust
Internal sensor failure
Damaged or corroded connector

Symptoms

  • Malfunction indicator lamp on
  • DPF regeneration inhibited, soot load rises

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–300
Time0.3–1.5 h

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

Parts involved

exhaust gas temperature sensoregt wiringecm

Related codes

P2031P2033P2035P0545

References: saabwisonline.com, gsi.ext.gm.com, gsi.ext.gm.com, fordservicecontent.com.