P1489 BMW Fault Code

Description:

The Transmission Fluid Pressure Switch allows the engine's control module (PCM) or Transmission Control Module (TCM) to use hydraulic fluid to engage the clutches in the transmission to allow for smoother shifting while driving. If the PCM or TCM detects an issue with the hydraulic clutch or the pressure switch, the BMW PCM or TCM will set code P1489

P1489 Code Symptoms :

If your P1489 check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P1489 and engine control unit are in charge of monitoring a bunch of different , and if they get a reading that's a little out of whack, up pops the check engine light.

Diagnosis And Repairing P1489

P1489 OBD 2 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

How to fix P1489 code ?

• Exhaust tube
• Faulty Fuel injector
• Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
• Foreign matter caught in fuel filler cap

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code P1489, so consult the manual to locate the brake fluid reservoir.

Bear in mind that a low fluid level can set code P1489 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.