C3525 Diagnostic Trouble Code

C3525 is a kind of OBD-II Diagnostic C-Chassis Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a C3525 diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Look at the plug wires to make sure they are not burnt or laying on the exhaust. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code C3525 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before C3525.

Fortunately, C3525 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3525 Trouble Code For Specific Cars

C3525 Citroen 7a Flash To Pass Switch Circuit Short To Battery
C3525 Goggomobil Regent Passenger Airbag Disable Module Sensor Obstructed
C3525 Chevrolet Journey Dynamic Stability Control Right Rear Valve Malfunction
C3525 Triumph Renown PATS Received Invalid Format Of Key-Code From Ignition Key Transponder
C3525 Nissan Qashqai Crankshaft Position Camshaft Position Correlation (Bank 2 Sensor B)
C3525 Ford Focus Mirror Driver Down Circuit Short To Battery
C3525 Isuzu Florian