C1511 Diagnostic Trouble Code

C1511 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 C1511 diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs. 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. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition.

Process Tips

Diagnostic trouble code C1511 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 C1511.

Fortunately, C1511 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1511 Trouble Code For Specific Cars

C1511 Chery A5 Double Lock Timeout Failure
C1511 Stanley 20 Hp Lamp Park Input Circuit Failure
C1511 Honda N600 RCNT Solenoid Circuit Malfunction
C1511 Austin Maxi Aux A/C Blower Motor Relay Circuit Short to Battery
C1511 Citroen Ak Floor Temperature Switch Circuit Malfunction
C1511 Sunbeam-talbot 4-litre Mass or Volume Air Flow Circuit low Input
C1511 Dodge Maxx Ignition Key-In Circuit Short To Ground