P0089 Fuel Pressure Regulator Performance Toyota Tundra: Complete Diagnosis and Repair Guide
P0089 on a Toyota Tundra means the ECM has detected that actual fuel rail pressure is significantly different from the commanded fuel pressure: most commonly because the fuel pressure regulator inside the in-tank fuel pump module is failing, the fuel pump itself is losing volume output, or a fuel pressure sensor is providing inaccurate data […]