P2482: Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 5)

With P2482 the fifth bank 1 exhaust probe delivers a signal above its upper electrical limit. On GM diesels this code also covers the open circuit: the 2018 table sets it above 1400 Ω, both as a short to power with the driver off and as an interruption with the driver on, after 10 of 20 samples, Type B. The 2020 table makes it Type A. In 2025 GM uses more than 100 MΩ, or a digital value hotter than about 1290 °C, after 19 of 25 samples, again Type A with the lamp on after one trip. Ram names P2482 together with P2481 for its 2025–2026 heavy-duty diesel pick-ups. A loose plug or broken lead is therefore as likely as a failed probe. Compare with P2481 for the short to ground.

Bank 1 is the side of the engine with cylinder 1. Inline engines only have this bank.

Symptoms

• Warning lamp, on GM from 2020 after a single trip
• Probe 5 shows a fixed extreme value
• Regeneration suppressed

Most likely causes

• Loose, corroded or unplugged connector
• Broken lead from heat or vibration
• Probe element open or high-resistance

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the soot load and differential pressure with a scanner
2. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
3. Check the differential pressure sensor's hoses
4. Check the temperatures before and after the filter
5. Fix any fuel injection or EGR codes before regenerating
6. Perform a regeneration while driving or at a repair shop when the diagnosis allows it

Good to know

• Repair difficulty: medium
• It can trigger limp mode.
• It affects emissions.

What each character of P2482 means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 4: Emissions
• 82: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2482?

If the light is on steadily, take a highway drive or go to a repair shop soon. If the car is in limp mode or the light is flashing, do not push the engine.

What causes code P2482?

The most common causes are: loose, corroded or unplugged connector; broken lead from heat or vibration; probe element open or high-resistance.

Related codes

• P2480Exhaust Gas Temperature Sensor Circuit/Open (Bank 1 Sensor 5)
• P2481Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 5)
• P2483Exhaust Gas Temperature Sensor Circuit Range/Performance (Bank 1 Sensor 5)
• P2484Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic (Bank 1 Sensor 5)
• P2487Exhaust Gas Temperature Sensor Circuit High (Bank 2 Sensor 5)

Sources

• gsi.ext.gm.com: 18OBDG04 Engine Diagnostics
• gsi.ext.gm.com: 20OBDG04 Diagnostics
• gsi.ext.gm.com: 25OBDG04A
• static.nhtsa.gov: MC 11031237 0001

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.