BMW DTC P281B – Pressure Control Solenoid ‘H’ Control Circuit/Open
DTC P281B meaning on BMW
The DTC P281B fault code on a BMW indicates an issue with the Pressure Control Solenoid ‘H’ control circuit being open. This means that the powertrain control module (PCM) has detected an open circuit in the control system for the pressure control solenoid ‘H’, which is responsible for regulating hydraulic pressure within the transmission.
BMW DTC P281B symptoms
Symptoms of the DTC P281B on a BMW may include erratic shifting behavior, harsh shifting, transmission slipping, decreased fuel efficiency, and in some cases, the transmission may go into a failsafe mode to prevent further damage.
BMW DTC P281B causes
The common causes of the DTC P281B on a BMW include a faulty pressure control solenoid ‘H’, damaged wiring or connectors in the control circuit, low transmission fluid level, or a malfunctioning PCM.
BMW DTC P281B seriousness
Ignoring the DTC P281B on a BMW can lead to further transmission damage and potentially result in costly repairs. It is important to address this issue promptly to prevent any long-term damage to the transmission system.
How to diagnose DTC P281B on BMW
To diagnose the DTC P281B on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault codes stored in the PCM. They would then inspect the pressure control solenoid ‘H’, check the wiring and connectors for any damage, and perform a transmission fluid level and condition check.
How to fix DTC P281B on BMW
Fixing the DTC P281B on a BMW may involve replacing the pressure control solenoid ‘H’, repairing any damaged wiring or connectors, ensuring the transmission fluid level is correct, and resetting the PCM. It is recommended to have this repair done by a qualified mechanic to ensure proper diagnosis and repair.
How to erase DTC P281B on BMW
To erase the DTC P281B on a BMW, a mechanic would use a diagnostic scanner to clear the fault code from the PCM’s memory. Once the repair has been completed and the issue resolved, the mechanic can then erase the fault code to turn off the check engine light.
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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.