P2481
System
Powertrain (Diesel Emissions)
Scanner required
Full-system scanner (engine, ABS, SRS, transmission, service resets)

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

Understand P2481, common causes, and the right SEAFLO pump to diagnose it.

EGT sensor circuit open or high voltage.

Common symptoms

  • Regen may not complete
  • Check engine light

Typical causes

  • Open EGT circuit
  • Failed sensor
  • Connector unplugged after exhaust service

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 P2481 with a basic code reader?
P2481 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 P2481?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.