C1507 Diagnostic Trouble Code

C1507 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 C1507 diagnostic trouble code may include:

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

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
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. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code C1507 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 C1507.

Fortunately, C1507 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1507 Trouble Code For Specific Cars

C1507 Lanchester 40 Speed Fuel Pump Positive Feed Fault
C1507 Mercedes-benz 250 Air Bag Passenger Circuit Resistance Low or Shorted Together
C1507 Secma F16 Insufficient Coolant Temperature for Closed Loop Fuel Control
C1507 Tvr 3000 Port Air Relief Circuit Malfunction
C1507 Vauxhall Calibra Pressure Control Solenoid "A" Short Circuit
C1507 Opel Calibra Decklid Ajar Rear Door Circuit Short To Battery
C1507 De Soto Fireflite Hood Switch Circuit Short To Ground