C3270 Diagnostic Trouble Code

C3270 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 C3270 diagnostic trouble code may include:

Cherry red hot catalytic converter
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Reduction in engine performance, especially at low RPM levels

Possible Causes :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.

Process Tips

Diagnostic trouble code C3270 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 C3270.

Fortunately, C3270 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3270 Trouble Code For Specific Cars

C3270 Subaru Coupe Left Front Center Sensor Circuit Short to Vbat
C3270 Audi Allroad Anti Theft Input Signal Circuit Failure
C3270 Wartburg 311 SCP (J1850) Invalid or Missing Data for Interior Lamp Outage
C3270 Hyundai Matrix SCP (J1850) Invalid or Missing Data for Climate Control (HVAC)
C3270 Mitsubishi Eclipse Ii Autolamp Delay Circuit Short To Battery
C3270 Adler 12 ABS Inlet Valve Coil RF Circuit Short To Ground
C3270 Geely Maple O2 Sensor Signals Swapped Bank 1 Sensor 2/ Bank 2 Sensor 2