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DF502 Engine Trouble Code

Meaning of DF502 engine trouble code is a kind of and DF502 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.

DF502 Fault Symptoms :

  1. Check engine light comes on
  2. Engine stalling or misfiring
  3. Engine performance issues
  4. Car not starting
If one of these reasons for DF502 code is occuring now you should check DF502 repair processes.
Now don't ask yourself; What should you do with DF502 code ?
The solution is here :

DF502 Possible Solution:

DF502 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.

DF502 Code Meaning :

D f 5 0 2
For Engine Fuel Composition Sensor Circuit Malfunction Cold Start Injector 1 Malfunction Glow Plug/Heater Circuit 'A' Malfunction

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.

DF502 Description

DF502 engine trouble code is about Glow Plug/Heater Circuit 'A' Malfunction.

Main reason For DF502 Code

The reason of DF502 OBD-II Engine Trouble Code is Fuel Composition Sensor Circuit Malfunction.

DF502 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.