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P1521 Engine Trouble Code

Meaning of P1521 engine trouble code is : P1521 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,000 and you can't do it yourself unless you're an experienced mechanic.

P1521 Possible Solution:

P1521 Engine

Power Steering Pressure (PSP) Switch Malfunction In Key On, Engine Off Self-Test, this DTC indicates the PSP input to the PCM is high. In Key On, Engine Running Self-Test, this DTC indicates that the PSP input did not change state. Steering wheel must be turned during Key On, Engine Running Self-Test PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged.

P1521 Code Meaning :

P 1 5 2 1
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Fuel And Air Metering Fuel Composition Sensor Circuit Malfunction Turbocharger Boost Sensor A Circuit Low Crankshaft Position Sensor A Circuit Low Input

The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate.

P1521 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P1521 OBD-II Trouble Code Variable Intake Solenoid #1 Circuit Malfunction is one of the definitions for the P1521; however your vehicles manufacturer may have a different definition for the P1521 code. Please check below for y P1521 code.

Reason For P1521 Code

The reason of P1521 OBD-II Engine Trouble Code is Fuel Composition Sensor Circuit Malfunction.

P1521 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.