C1929 Diagnostic Trouble Code

C1929 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 C1929 diagnostic trouble code may include:

If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Corroded or damaged connector
Reduction in engine performance, especially at low RPM levels
Malfunction Indicator Lamp (MIL) illuminated

Possible Causes :

Dirty air cleaner element Damaged DPF
A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

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 C1929 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 C1929.

Fortunately, C1929 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1929 Trouble Code For Specific Cars

C1929 Mazda Midge Turbocharger Boost Sensor B Circuit Low
C1929 Lada S Shift Solenoid C Control Circuit High
C1929 Mercedes Cl 600 ABS Inlet Valve Coil RF Circuit Short To Battery
C1929 Steyr Type 50 Lamp Turn Signal Front Output Circuit Short To Battery
C1929 Ford Contour MAF Sensor In Range But Lower Than Expected
C1929 Sunbeam-talbot Mk Iii Master Cylinder Pressure Sensor Circuit Failure
C1929 Cadillac V Disable Signal Open Circuit