Jeep
Post-catalyst fuel trim too rich, bank 2. Often reported on Wrangler 3.6 Pentastar.
P2099 fault code: what it means
P2099: Post-catalyst fuel trim too rich, bank 2. Often reported on Wrangler 3.6 Pentastar.
Usual causes, most likely first
- rear O2 sensor bank 2
- worn catalytic converter
- exhaust leak near the sensor
P2099 by make
What the repair usually costs
- Air-fuel ratio / front O2 sensor replace (upstream)NZ$270–NZ$750 · A$260–A$730
- O2 sensor replace (downstream / after cat)NZ$180–NZ$480 · A$180–A$460
- Catalytic converter replace, aftermarket direct-fitNZ$570–NZ$1,570 · A$540–A$1,490
- Catalytic converter replace, genuineNZ$1,640–NZ$5,160 · A$1,470–A$4,590
Not sure what P2099 means on your car? Ask Credov.
Before you clear it
Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.
Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.