BMW DTC P1087 – O2 Sensor Circuit Slow Response in Lean Control Range (Bank 1 Sensor 1)
DTC P1087 meaning on BMW
The DTC P1087 on a BMW indicates an issue with the O2 sensor circuit’s slow response in the lean control range for Bank 1 Sensor 1. This means that the oxygen sensor located before the catalytic converter on the bank 1 side of the engine is not responding quickly enough to changes in the air-fuel mixture, particularly when the mixture is lean.
BMW DTC P1087 symptoms
Symptoms of the DTC P1087 on a BMW may include poor fuel economy, rough idling, hesitation during acceleration, and potentially an illuminated check engine light on the dashboard.
BMW DTC P1087 causes
The causes of the DTC P1087 on a BMW can vary, but common reasons include a faulty oxygen sensor, wiring issues in the sensor circuit, vacuum leaks, exhaust leaks, or a problem with the engine’s air intake system.
BMW DTC P1087 seriousness
While the DTC P1087 may not cause immediate drivability issues, it can lead to decreased fuel efficiency and increased emissions. Ignoring this fault code can potentially cause damage to the catalytic converter over time.
How to diagnose DTC P1087 on BMW
To diagnose the DTC P1087 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault code and then proceed to inspect the oxygen sensor, check the wiring for any damage, and perform tests to identify any vacuum or exhaust leaks.
How to fix DTC P1087 on BMW
Fixing the DTC P1087 on a BMW may involve replacing the oxygen sensor, repairing any damaged wiring, fixing vacuum or exhaust leaks, or addressing any issues with the air intake system. It is recommended to follow the manufacturer’s diagnostic and repair procedures to ensure a proper fix.
How to erase DTC P1087 on BMW
Once the underlying issue causing the DTC P1087 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. This will reset the check engine light and allow the vehicle’s onboard computer to monitor the system for any new faults.
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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