Error code

OBD2 P2098

OBD2P2098
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Post Catalyst Fuel Trim System Too Lean.

Severity

moderateCan drive but performance may be affected.

Summary

P2098 indicates that the post-catalytic converter fuel trim on bank 2 is too lean, meaning there's an excess of oxygen in the exhaust gases after the catalytic converter.

Symptoms

  • Diminished fuel efficiency
  • Lack of general engine performance
  • Service engine soon lamp illumination

Common Causes

  • Faulty catalytic converter
  • Defective O2 sensor
  • Engine exhaust leaks
  • Burnt, chafed, broken, or disconnected wiring and/or connectors
  • A faulty mass air flow or manifold air pressure sensor

Diagnosis

  1. Check for misfire codes, throttle position sensor codes, and other related codes.
  2. Inspect wiring harnesses near hot exhaust pipes and manifolds.
  3. Use a diagnostic scanner to retrieve stored trouble codes and freeze frame data.
  4. Observe O2 sensor input data in the scanner's data stream.

Fixes

  • Replace faulty catalytic converter or defective O2 sensor

FAQ

What does P2098 mean?

P2098 indicates that the post-catalytic converter fuel trim on bank 2 is too lean, meaning there's an excess of oxygen in the exhaust gases after the catalytic converter.

How do I diagnose P2098?

Diagnose by checking for related codes, inspecting wiring harnesses and connectors, using a diagnostic scanner to retrieve data, and observing O2 sensor input data in the scanner's data stream.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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