Powertrain, generic (extended)

P2485 Exhaust Gas Temperature Sensor Circuit/Open (Bank 2 Sensor 5)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2485 reports a circuit or open-circuit fault at a fifth exhaust temperature probe on bank 2. That requires a V engine with two separate aftertreatment lines carrying five probes each, a layout no public maker document shows. No manufacturer documents P2485. The closest reference is GM's single-bank diesel, which watches its probe 5 on bank 1 and folds the open circuit into the High code P2482 (above 1400 Ω in 2018, beyond 100 MΩ in 2025). CARB merely requires that every such input be monitored for circuit faults. If the code appears, check that the scan tool's probe numbering matches the vehicle, then the connector and lead. Bank 1 equivalent: P2480; Low/High of the same probe: P2486/P2487.

Likely causes

Interrupted lead between control unit and probe
Connector left unplugged after exhaust work
Probe element open

Symptoms

  • Warning lamp on
  • No valid value for this probe

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–350
Time0.5–2 h

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

Parts involved

egt sensor b2s5egt wiring

Related codes

P2480P2486P2487P2488P2489

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