BMW DTC P3457 – Cylinder 8 Deactivation/Intake Valve Control Circuit/Open
DTC P3457 meaning on BMW
The DTC P3457 code on a BMW indicates an issue with the Cylinder 8 Deactivation/Intake Valve Control Circuit being open. This means that there is a malfunction in the circuit that controls the deactivation of cylinder 8 or the intake valve.
BMW DTC P3457 symptoms
Symptoms of the DTC P3457 code on a BMW may include rough idling, reduced engine performance, decreased fuel efficiency, and in some cases, the Check Engine Light may illuminate on the dashboard.
BMW DTC P3457 causes
The common causes of the DTC P3457 code on a BMW include a faulty intake valve control solenoid, wiring issues in the control circuit, a defective PCM (Powertrain Control Module), or a mechanical problem with the cylinder deactivation system.
BMW DTC P3457 seriousness
While the DTC P3457 code may not cause immediate drivability issues, it can lead to reduced engine performance and fuel efficiency if left unresolved. It is recommended to address this issue promptly to prevent further damage to the engine components.
How to diagnose DTC P3457 on BMW
To diagnose the DTC P3457 code on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault codes stored in the vehicle’s PCM. They would then inspect the intake valve control circuit, test the intake valve control solenoid, and check for any wiring issues or mechanical problems in the cylinder deactivation system.
How to fix DTC P3457 on BMW
Fixing the DTC P3457 code on a BMW may involve replacing the faulty intake valve control solenoid, repairing any wiring issues in the control circuit, or addressing any mechanical problems with the cylinder deactivation system. It is recommended to follow the manufacturer’s diagnostic and repair procedures to ensure a proper fix.
How to erase DTC P3457 on BMW
Once the underlying issue causing the DTC P3457 code on a BMW has been fixed, the code can be erased using a diagnostic scanner. The scanner can clear the fault codes stored in the PCM, and the Check Engine Light should turn off once the code has been successfully erased.
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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