Land Rover P0A1B
Drive Motor “A” Control module Performance might also be set. Status: • DO NOT CLEAR THE CODES- run diagnosis and breakdown for fault. •
Quick answer
For a 2025 US Land Rover Range Rover, DTC P0A1B may indicate “Drive Motor ‘A’ Control Module Performance” in the Electric Power Inverter Converter (EPIC). Do not clear the codes; diagnosis and fault breakdown are required.
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 P0A1B mean?
For a 2025 US Land Rover Range Rover, DTC P0A1B may indicate “Drive Motor ‘A’ Control Module Performance” in the Electric Power Inverter Converter (EPIC). Do not clear the codes; diagnosis and fault breakdown are required.
2. Technical explanation
Verified manufacturer communication states that P0A1B-00 may be stored in the Gen 4 PHEV Electric Power Inverter Converter (EPIC). A related manufacturer communication states P0A1B may also be set when DTC P0A78-49 is stored in the EPIC. The verified instruction is: do not clear the codes and run diagnosis and breakdown for the fault.
3. What system is affected?
Electric Power Inverter Converter (EPIC); Drive Motor “A” control module performance.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
Not yet established by verified evidence.
6. Possible causes
- P0A1B may be set alongside P0A78-49 in the Electric Power Inverter Converter (EPIC), according to a verified Land Rover manufacturer communication.
- The underlying cause is 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
- Do not clear stored diagnostic trouble codes.
- Arrange for diagnosis and fault breakdown by a Land Rover retailer or qualified service provider.
- Preserve the stored fault information for the diagnostic process.
10. Step-by-step troubleshooting
- For Gen 4 PHEV vehicles with P0A1B-00 stored in the EPIC, the verified communication directs retailers to complete the Electric Power Inverter Converter Health Check application through the manufacturer workflow.
- Further diagnostic steps are not established by the supplied verified evidence.
11. When to contact service
Contact a Land Rover retailer for diagnosis. The verified manufacturer instruction is not to clear codes and to run diagnosis and fault breakdown.
12. What the service center may check
- Check whether P0A1B-00 is stored in the Electric Power Inverter Converter (EPIC).
- For applicable Gen 4 PHEV vehicles, complete the Electric Power Inverter Converter Health Check application through the manufacturer workflow.
- Check for DTC P0A78-49 in the EPIC, as verified evidence states P0A1B may also be set with P0A78-49.
- Do not clear the codes before diagnosis and fault breakdown.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Land Rover Range Rover · 2025 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication PDF 11020211: TUCC_JUN2025_48, published June 14, 2025. It states that when P0A1B-00 is stored in the Gen 4 PHEV EPIC, retailers are to complete the Electric Power Inverter Converter Health Check application through the manufacturer workflow.
- NHTSA Manufacturer Communication PDF 11018308: TUCC_MAY2025_31, published May 9, 2025. It states that P0A1B may also be set when P0A78-49 is stored in the EPIC, and instructs: do not clear the codes; run diagnosis and breakdown for the fault.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified applicability: 2025 Land Rover Range Rover, US market. Source: NHTSA-posted Land Rover manufacturer communications. https://static.nhtsa.gov/odi/tsbs/2025/MC-11020211-0001.pdf
19. Frequently asked questions
What does P0A1B mean on the applicable Range Rover?
Verified evidence describes P0A1B as Drive Motor “A” Control Module Performance and identifies the Electric Power Inverter Converter (EPIC) as the relevant module.
Should P0A1B be cleared?
No. The verified manufacturer communication explicitly states: do not clear the codes; run diagnosis and breakdown for the fault.
Is P0A1B associated with another code?
Yes. A verified manufacturer communication states that P0A1B may also be set when P0A78-49 is stored in the EPIC.
What is the specified service action for P0A1B-00?
For Gen 4 PHEV vehicles with P0A1B-00 stored in the EPIC, the communication directs retailers to complete the Electric Power Inverter Converter Health Check application through the manufacturer workflow.