P2480 code meaning
Exhaust Gas Temperature Sensor Circuit/Open (Bank 1 Sensor 5)
Powertrain system Generic code P24xx codes Check engine light
What P2480 means
P2480 is the general circuit or open-circuit fault of a fifth exhaust temperature probe on bank 1. Five probes in one line are rare; GM's small diesels with oxidation catalyst, SCR, second catalyst and filter are among the few layouts that use them. GM does not report P2480 there, however: its 2018 tables detect an interrupted probe 5 inside P2482, by a resistance above 1400 Ω with the output energised, and the 2025 tables treat values beyond 100 MΩ the same way. So no maker documents P2480 publicly; CARB only requires that the circuit be monitored. Typical findings would be a broken lead, a corroded plug near the hot exhaust, or a probe whose element has burned through. Low and High faults of the same probe are P2481 and P2482.
P2480 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2480
- Warning lamp on
- Missing or frozen value for probe 5 in live data
- Filter regeneration may be suppressed
Common causes of P2480
- Most likelyBroken or chafed lead to probe 5
- PossibleCorroded or loose connector near the exhaust
- PossibleMeasuring element of the probe burned through
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Egt sensor b1s5Egt wiring
What each part of P2480 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 80 | The exact fault in that area. |
What to do next
- Note P2480 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2480
What does P2480 mean?
P2480 means "Exhaust Gas Temperature Sensor Circuit/Open (Bank 1 Sensor 5)". P2480 is the general circuit or open-circuit fault of a fifth exhaust temperature probe on bank 1. It is a generic code, so it means the same on every make.
Is it safe to drive with P2480?
Drive gently and only to a workshop. With P2480 the car can go into limp mode (reduced power) to protect itself.
Will P2480 fail an emissions test?
Yes, it can. P2480 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2480 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2480 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.