P2098 code meaning
Post Catalyst Fuel Trim System Too Lean (Bank 2)
Powertrain system Generic code P20xx codes Check engine light
What P2098 means
P2098 is the bank 2 version of P2096 on V and flat engines with a catalyst and rear oxygen sensor per bank. The post-catalyst trim of bank 2 has reached its lean-side limit because the rear sensor of that bank keeps reporting rich exhaust. Ford monitors both banks the same way and sets the code 5 s after the bank 2 rear bias trim reaches -0.083; GM's Bosch-based 2005 2.8 and 3.6 V6 and the 2008 3.6 LLT list it as a rich shift of the secondary trim beyond its calibrated limit. If only one bank reports it, compare the two banks' rear sensor signals and the front sensor readings: a fault on one side points to that bank's sensors or its exhaust, whereas both banks together hint at a common cause such as fuel or calibration. Audi saw P2098 with P2096 on 2013 to 2016 A8, S6, S7, S8, RS 6 and RS 7 4.0 TFSI, caused by contaminated reference air ducts in the rear sensors, not by the front sensors the guided test suggests.
P2098 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P2098
- Malfunction indicator lamp on
- Usually no noticeable change in driveability
Common causes of P2098
- Most likelyBank 2 rear oxygen sensor skewed rich
- PossibleBank 2 front sensor reading lean
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Oxygen sensor downstreamOxygen sensor upstreamCatalytic converter
What each part of P2098 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 98 | The exact fault in that area. |
What to do next
- Note P2098 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2098
What does P2098 mean?
P2098 means "Post Catalyst Fuel Trim System Too Lean (Bank 2)". P2098 is the bank 2 version of P2096 on V and flat engines with a catalyst and rear oxygen sensor per bank. It is a generic code, so it means the same on every make.
Is it safe to drive with P2098?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2098 fail an emissions test?
Yes, it can. P2098 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2098 to fix?
Difficulty: medium. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2098 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.