C0849 Diagnostic Trouble Code

C0849 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 C0849 diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
Engine surge

Possible Causes :

Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
An air leak forward of the DPF will change the sensor readings resulting in the code
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

Look at the plug wires to make sure they are not burnt or laying on the exhaust. Now, clear the codes and test-drive the vehicle to see if the code is reset. 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 C0849 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 C0849.

Fortunately, C0849 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0849 Trouble Code For Specific Cars

C0849 Ford Country Main Catalyst Efficiency Below Threshold (Bank 2)
C0849 Mercury Monarch Air Suspension Rear Height Sensor High (SE) Signal Circuit Short To Ground
C0849 Mercedes Gl Accelerometer Rear Circuit Failure
C0849 Hyundai Terracan SCP (J1850) Invalid or Missing Data for Electrical Energy Management
C0849 Premier Padmini Fuel Rail Pressure Sensor Circuit Intermittent
C0849 Tata E 220 Mirror Passenger Up Circuit Short To Ground
C0849 Ferrari 550 Intake Manifold Runner Control (Stuck Open)