Land Rover P0099-00
– This condition is currently under investigation. – Engineering is seeking data and parts from an affected vehicle undisturbed. – Raise a TA prior to performing diagnostic s on th
Common search variants: P009900 · P0099 00 · P0099_00 · Search ignores case and common separators.
Quick answer
For applicable Land Rover vehicles, P0099-00 may be stored with a Check Engine/MIL concern. The condition was under investigation in the verified manufacturer communication. Raise a Technical Assistance (TA) case before diagnostic work so it can be escalated to Engineering.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does P0099-00 mean?
For applicable Land Rover vehicles, P0099-00 may be stored with a Check Engine/MIL concern. The condition was under investigation in the verified manufacturer communication. Raise a Technical Assistance (TA) case before diagnostic work so it can be escalated to Engineering.
2. Technical explanation
The verified NHTSA-posted Land Rover manufacturer communication states that P0099-00 may also be stored in the PCM alongside P0096-85. It does not establish a component-level fault, root cause, or repair procedure for P0099-00.
3. What system is affected?
The communication identifies the PCM as the module where P0099-00 may be stored. A more specific affected system is not yet established by verified evidence.
4. How serious is this code?
Unknown. The verified evidence does not assign a severity level.
5. Symptoms you may notice
- Check Engine/MIL illuminated.
- P0099-00 may be stored in the PCM.
- P0096-85 may be stored in the PCM.
6. Possible causes
- Not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Arrange Land Rover service or contact a Land Rover retailer.
- Raise a TA before diagnostic work, as directed by the verified manufacturer communication.
- Reference SSM 75405/75406 when raising the TA.
10. Step-by-step troubleshooting
- The verified communication directs technicians to raise a TA before performing diagnostics so the case can be escalated directly to Engineering for support.
- No further diagnostic procedure is established by the supplied verified evidence.
11. When to contact service
Contact a Land Rover retailer/service provider. The verified communication instructs personnel to raise a TA before diagnostic work and reference SSM 75405/75406.
12. What the service center may check
- Confirm whether the Check Engine/MIL is illuminated.
- Confirm PCM stored DTCs, including P0099-00 and P0096-85 where present.
- Raise a TA before performing diagnostics and reference SSM 75405/75406.
13. Possible repair or resolution
- No repair or resolution is established by the supplied verified evidence.
- The condition was described as under investigation, with Engineering seeking data and parts from an affected vehicle undisturbed.
14. Affected vehicles
- Land Rover Range Rover · 2019–2022 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication PDF 10199075: SFCC_MAY2021_35, published June 21, 2021.
- The communication covers a Check Engine/MIL concern and states that P0099-00 may also be stored in the PCM. It directs a TA to be raised before diagnostics and references SSM 75405/75406.
16. Recall information
- No recall information is established by the supplied verified evidence.
17. Official manufacturer information
Verified source: NHTSA Manufacturer Communication PDF 10199075: SFCC_MAY2021_35 (Land Rover), https://static.nhtsa.gov/odi/tsbs/2021/MC-10199075-0001.pdf
19. Frequently asked questions
What does P0099-00 mean on an applicable Land Rover?
The supplied verified communication does not provide a component-level definition. It states that P0099-00 may also be stored in the PCM in a Check Engine/MIL condition involving P0096-85.
What should be done before diagnostics?
Raise a TA before performing diagnostics and reference SSM 75405/75406, so the case can be escalated directly to Engineering for support.
Is there a verified repair?
No. The verified communication says the condition was under investigation and does not provide a repair procedure.