P2298
System
Powertrain (Emissions)
Scanner required
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

O2 Sensor Out of Range During Deceleration (Bank 2 Sensor 1)

Understand P2298, common causes, and the right TOPDON scanner to diagnose it.

Bank 2 upstream O2 out of range on deceleration.

Common symptoms

  • Check engine light
  • Rough idle on V engines

Typical causes

  • Failed bank 2 O2
  • Exhaust leak bank 2
  • Rich condition on that bank

What scanner do you need?

Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

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

Recommended TOPDON scanners

Frequently asked questions

Can I diagnose P2298 with a basic code reader?
P2298 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 P2298?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.