EV Diagnostics
Verified EV diagnostic knowledge page

Dodge P2099

Downstream Fuel Trim System 2 Rich

DriveUnknown. Safe-to-drive status is not established by verified evidence.
ChargeUnknown. Safe-to-charge status is not established by verified evidence.
ServiceService need is unknown. Contact a Dodge dealer or qualified service provider to confirm whether an applicable manufacturer communication covers the specific vehicle and to perform manufacturer-directed diagnosis.
Confidence95%

Quick answer

P2099 means “Downstream Fuel Trim System 2 Rich.” Verified applicability is limited to the 2026 Dodge Charger in the US. Official Dodge communications submitted to NHTSA state that P2099-00 can be set falsely in the covered bulletin populations, but the supplied evidence does not establish the exact affected configuration or corrective procedure for this Charger application.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

P2099 | p2099 Post Catalyst Fuel Trim System Too Rich Bank 2 | p2099 code | dtc p2099IG Garage
DTC Dodge P2099 Short ExplanationMaxidot Dodge

Videos are supporting material and never override OEM or regulator evidence.

1. What does P2099 mean?

P2099 means “Downstream Fuel Trim System 2 Rich.” Verified applicability is limited to the 2026 Dodge Charger in the US. Official Dodge communications submitted to NHTSA state that P2099-00 can be set falsely in the covered bulletin populations, but the supplied evidence does not establish the exact affected configuration or corrective procedure for this Charger application.

2. Technical explanation

P2099-00 is the manufacturer-described DTC for a downstream fuel-trim condition on system 2 reported as rich. The supplied official NHTSA manufacturer-communication summaries list P2099-00 and state that the listed DTCs are being falsely set. They also list P2096, P2097, P2098, and P068A-00. The evidence does not establish the diagnostic thresholds, enabling conditions, root cause, or a repair method.

3. What system is affected?

Downstream Fuel Trim System 2. The supplied evidence does not further identify components, sensors, engine configuration, or control module.

4. How serious is this code?

Unknown. Severity is not established by the verified evidence.

5. Symptoms you may notice

  • Not yet established by verified evidence.

6. Possible causes

  • Official Dodge communications submitted to NHTSA state that P2099-00 may be falsely set in their covered bulletin populations.
  • Any underlying mechanical, fuel, exhaust, sensor, wiring, or control-system cause is not yet established by verified evidence.

7. Can I still drive the vehicle?

Unknown. Safe-to-drive status is not established by verified evidence.

8. Can I charge the vehicle?

Unknown. Safe-to-charge status is not established by verified evidence.

9. What you can safely do

  • Record the exact DTC suffix shown by the vehicle or scan tool, such as P2099-00.
  • Have a Dodge dealer or qualified service provider check whether an applicable manufacturer communication applies to the vehicle.
  • Do not attempt high-voltage or other hazardous vehicle repairs; no such repair procedure is supported by the supplied evidence.

10. Step-by-step troubleshooting

  1. Confirm P2099-00 with a diagnostic scan tool and document any accompanying DTCs.
  2. Check applicable Dodge dealer information for the vehicle identification number and installed configuration. Further diagnostic steps are not yet established by verified evidence.

11. When to contact service

Service need is unknown. Contact a Dodge dealer or qualified service provider to confirm whether an applicable manufacturer communication covers the specific vehicle and to perform manufacturer-directed diagnosis.

12. What the service center may check

  • Confirm whether P2099-00 is present.
  • Review accompanying codes identified in the official communication: P2096-00, P2097-00, P2098-00, and P068A-00.
  • Verify applicability of the relevant Dodge manufacturer communication by VIN and vehicle configuration. Further service checks are not yet established by verified evidence.

13. Possible repair or resolution

  • The supplied evidence does not establish a repair or resolution.
  • The official communication summaries indicate that P2099-00 may be falsely set in covered populations; a dealer should use the applicable manufacturer bulletin rather than assuming a component failure.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Dodge/NHTSA Manufacturer Communication 08-137-26, including revisions A through D: lists P2099-00 and states the listed DTCs are being falsely set. Applicability to a specific 2026 Dodge Charger configuration is not established by the supplied summary.
  • Dodge/NHTSA Manufacturer Communication 18-022-26, including revisions A through E: lists P2099-00 and states the listed DTCs are being falsely set. Applicability to a specific 2026 Dodge Charger configuration is not established by the supplied summary.
  • Dodge/NHTSA Manufacturer Communication 21-020-26, including revisions A through D: lists P2099-00 and states the listed DTCs are being falsely set. Applicability to a specific 2026 Dodge Charger configuration is not established by the supplied summary.

16. Recall information

  • No recall evidence was supplied.

17. Official manufacturer information

Verified source: NHTSA manufacturer communications for Dodge, including 08-137-26, 18-022-26, and 21-020-26 and their revisions, published March through May 2026. Source URLs supplied include https://static.nhtsa.gov/odi/tsbs/2026/MC-11031320-0001.pdf, https://static.nhtsa.gov/odi/tsbs/2026/MC-11031325-0001.pdf, and https://static.nhtsa.gov/odi/tsbs/2026/MC-11031326-0001.pdf.

19. Frequently asked questions

What does P2099 mean?

It means “Downstream Fuel Trim System 2 Rich.”

Does P2099 indicate a confirmed failed part?

No. The supplied official communication summaries say P2099-00 can be falsely set in covered bulletin populations. No failed part is established by the verified evidence.

Does this apply to a Dodge Charger?

Verified applicability identifies the 2026 Dodge Charger in the US. Exact configuration and bulletin eligibility must be confirmed by a Dodge dealer or qualified service provider.

Is it safe to drive or charge?

Safe-to-drive and safe-to-charge status are not yet established by verified evidence.

20. Sources & verification

ReferenceVerified
Show all 15 verified sources
Dodge P2099: Downstream Fuel Trim System 2 Rich | EV Diagnostics