P2480
System
Powertrain (Diesel Emissions)
Scanner required
Full-system scanner (engine, ABS, SRS, transmission, service resets)

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

Understand P2480, common causes, and the right SEAFLO pump to diagnose it.

EGT sensor circuit low — critical for DPF regen temperature monitoring on diesel engines.

Common symptoms

  • Regen failures
  • Check engine light
  • DPF warning

Typical causes

  • Short in EGT circuit
  • Failed EGT sensor
  • Heat damage to wiring near turbo/DPF

What scanner do you need?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Use live data and freeze frame to confirm the fault before replacing parts. ABS, SRS, and network U-codes usually require a full-system scanner.

Diagnostic tips

  • Record freeze frame data when the code first sets
  • Clear the code only after fixing the root cause
  • Check for related pending codes that point to a common issue
  • Verify battery voltage is above 12.4V before chasing sensor codes

Frequently asked questions

Can I diagnose P2480 with a basic code reader?
P2480 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with P2480?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.