BMW DTC P099E – Shift Solenoid ‘H’ Control Circuit Low
DTC P099E meaning on BMW
The Diagnostic Trouble Code (DTC) P099E for BMW refers to the Shift Solenoid ‘H’ Control Circuit Low. This code indicates that the control circuit for the shift solenoid ‘H’ is operating at a lower voltage level than expected.
BMW DTC P099E symptoms
Symptoms of the BMW DTC P099E may include issues with shifting gears, such as harsh or delayed shifting, erratic shifting patterns, or the transmission getting stuck in a particular gear. In some cases, the Check Engine Light may also illuminate on the dashboard.
BMW DTC P099E causes
The causes of the BMW DTC P099E can vary, but common reasons include a faulty shift solenoid ‘H’, damaged wiring or connectors in the control circuit, low transmission fluid levels, or internal transmission issues.
BMW DTC P099E seriousness
Ignoring the DTC P099E on a BMW can lead to further transmission problems and potential damage if left unresolved. It is important to address this issue promptly to prevent more severe issues and ensure the proper functioning of the transmission system.
How to diagnose DTC P099E on BMW
To diagnose the DTC P099E on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer system. They would then perform a visual inspection of the shift solenoid ‘H’, check the wiring and connectors for any damage, and test the voltage levels in the control circuit to identify the root cause of the issue.
How to fix DTC P099E on BMW
Fixing the BMW DTC P099E may involve replacing the faulty shift solenoid ‘H’, repairing any damaged wiring or connectors, ensuring the transmission fluid levels are adequate, and addressing any internal transmission problems if necessary. It is recommended to follow the manufacturer’s repair procedures and use quality replacement parts to resolve the issue effectively.
How to erase DTC P099E on BMW
Once the BMW DTC P099E has been diagnosed and fixed, the fault codes can be cleared using a diagnostic scanner. By clearing the codes, the Check Engine Light should turn off, indicating that the issue has been resolved. It is important to verify that the repair was successful by test-driving the vehicle and ensuring that the symptoms associated with the DTC P099E have been eliminated.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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