What does P1251 mean?
P1251 Toyota fault code is somewhat common on modified Toyota Hilux. The fault code itself is due to the turbo over-boosting in the lower load points. Its described as ‘failed stepper motor’ but its commonly not the case.
What does 1KD mean?
The 1KD-FTV is a 3.0 L (2,982 cc) straight-four common rail D-4D (Direct injection four-stroke common-rail Diesel) diesel engine with a variable nozzle turbocharger (VNT) and Intercooler. It has 16 valves and a double overhead camshaft (DOHC) design.
What turbo is on a 1KD?
Collection: Toyota Hilux / Prado 1KD-FTV turbos The 1KD-FTV is a 3.0 L straight-4 common rail D-4D (Direct injection 4-stroke common-rail Diesel) diesel engine with a variable nozzle turbocharger (VNT) and Intercooler.
Is the 1KD-FTV engine good?
The 1KD-FTV is not very durable and reliable compare to the old Toyota’s diesel engines, but we can point out that the 1KD engine is more powerful and at the same time consumes less fuel than its predecessor, the 1KZ engine.
What does a stepper motor do on a turbo?
Turbocharger Electric Stepper Motor Actuators facilitate excitor ring movement inside a VNT turbocharger. Ring movement translates into mechanical movement of variable vanes inside the turbine housing of the turbo. The vanes act in a similar way to a pneumatic actuated turbo dump valve on a standard turbocharger.
Why is my Hilux losing power?
The design fault stems from dust particles possibly leaking past the air filter to affect the mass air flow sensor, which is in charge of the engine’s fuel-to-air ratio. …
Is the d4d engine reliable?
For a long period of time, Toyota powertrains were considered the best and most reliable. According to most motorists, motors practically do not break in conditions of intensive use. One can argue with this statement, as the statistics of repairs suggests otherwise.
What Turbo is in Hilux?
Hilux / Prado 1KD-FTV 3.0L Turbocharger.
How do I get more power out of my D4D Hilux?
5 Ways to Get More Power From Your Diesel Engine
- Upgrade the Air Intake. One sure way to increase the performance of a diesel vehicle is to improve the airflow to the engine.
- Change or Reprogram the ECM.
- Using New Fuel Injectors.
- Turbochargers.
- Performance Exhaust.
What type of motor is a stepper motor?
DC synchronous motor
Stepper motors are a type of DC synchronous motor. Whereas the rotation of an induction motor is largely uncontrollable, the rotation of a stepper motor can be controlled with a remarkable degree of precision. Stepper motors can produce full, instantaneous torque – even from a standstill.
What does code p1264-fixya mean on Toyota 1KD?
Engine lacks power while driving while engine light on dash board lights up I have found those code to be shown in not only over boost conditions (wastegate) but EGR flow as well as Catalyst conditions. Being that you are lacking power I suggest you check the EGR for being stuck open, or the catalyst for being clogged.
What is the p1251 fault code on a Toyota?
Once again you connect the scan tool and find code P1251. You examine the live data during a road test and find no issues. Given that the same fault code has returned, you decide to replace the turbo boost control vacuum switching valve (VSV) complete with hose network, and the return the vehicle to the customer.
How does boost control work on a Toyota p1251?
Looking closely at the vacuum control signal supplied to the boost control VSV we can see how the ECU sent the command to reduce boost and the correct response was followed by the boost control VSV given the fall in vacuum level to the boost control actuator.
What is the fault code on a Toyota Pico?
Given that the same fault code has returned, you decide to replace the turbo boost control vacuum switching valve (VSV) complete with hose network, and the return the vehicle to the customer. Once again the vehicle returns to the workshop with fault code P1251 stored and loss of power.