BMW DTC P1266 – EGR Positioner Circuit Low (Bank 2)
DTC P1266 meaning on BMW
DTC P1266 on a BMW indicates an issue with the EGR (Exhaust Gas Recirculation) Positioner Circuit on Bank 2. This fault code is triggered when the Engine Control Module (ECM) detects that the voltage signal from the EGR position sensor on Bank 2 is lower than the specified range.
BMW DTC P1266 symptoms
Symptoms of DTC P1266 on a BMW may include rough idling, engine hesitation, decreased fuel efficiency, and in some cases, the Check Engine Light may illuminate on the dashboard.
BMW DTC P1266 causes
The common causes of DTC P1266 on a BMW include a faulty EGR position sensor, damaged wiring or connectors in the EGR circuit, or a problem with the ECM itself.
BMW DTC P1266 seriousness
While DTC P1266 may not cause immediate drivability issues, it can lead to poor engine performance and increased emissions if left unresolved. It is recommended to address this fault code promptly to prevent further damage to the vehicle.
How to diagnose DTC P1266 on BMW
To diagnose DTC P1266 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and perform a visual inspection of the EGR position sensor, wiring, and connectors. They may also conduct voltage tests to determine the integrity of the circuit.
How to fix DTC P1266 on BMW
Fixing DTC P1266 on a BMW usually involves replacing the faulty EGR position sensor, repairing any damaged wiring or connectors in the circuit, or reprogramming the ECM if necessary. It is important to follow the manufacturer’s guidelines and use OEM parts for a proper repair.
How to erase DTC P1266 on BMW
Once the underlying issue causing DTC P1266 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. By clearing the code, the Check Engine Light should turn off, indicating that the problem has been addressed.
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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