Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 2
The Powertrain Control Module (PCM) has detected a voltage signal from the Exhaust Gas Temperature (EGT) sensor for Bank 1, Sensor 2 that falls below the minimum calibrated threshold. This typically indicates a short to ground in the sensor circuit or a completely failed sensor reporting an impossibly low temperature.
While the vehicle will usually remain drivable, ignoring this code can prevent proper exhaust aftertreatment operation, potentially leading to clogged diesel particulate filters (DPF) or catalytic converter damage over time.
Common symptoms
- Illuminated Check Engine Light
- Failed emissions test
- Decreased fuel efficiency
- Incomplete or disabled DPF regeneration (diesel vehicles)
- Reduced engine power or limp mode (in some applications)
Likely causes
- Faulty Exhaust Gas Temperature (EGT) sensor (Bank 1, Sensor 2)
- Short to ground in the EGT sensor wiring harness
- Corroded, damaged, or loose electrical connector
- Severe exhaust leaks near the sensor
- Faulty Powertrain Control Module (PCM) (rare)
What to check before replacing parts
Visually inspect the EGT sensor, wiring harness, and connector for Bank 1 Sensor 2.
Look for: Look for melted wires, chafing against the exhaust pipe, or heavy corrosion inside the connector pins.
Monitor the EGT sensor data using a diagnostic scan tool.
Look for: Check if the temperature reading is stuck at an impossibly low value (e.g., -40 degrees) or if it fluctuates erratically when the wiring is wiggled.
Disconnect the EGT sensor and measure the reference voltage from the PCM.
Look for: With the key on, engine off, you should typically see a 5-volt reference signal at the connector; if it is 0V, there is a wiring or PCM issue.
Measure the internal resistance of the EGT sensor using a multimeter.
Look for: Compare the resistance ohms to the manufacturer's specifications for the current ambient temperature; an open circuit (OL) or near-zero ohms indicates a dead sensor.
Perform a continuity and short-to-ground test on the signal wire between the sensor connector and the PCM.
Look for: If there is continuity to ground on the signal wire while disconnected at both ends, the harness has a short that must be repaired.
This page explains the generic P2032 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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