P07B7 Diagnostic Trouble Code

P07B7 is a kind of OBD-II Diagnostic P-Powertrain 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 P07B7 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.
Diminished fuel efficiency

Possible Causes :

The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Defective ECU strategies or components will prevent proper regeneration
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

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. 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 scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code P07B7 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 P07B7.

Fortunately, P07B7 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P07B7 Trouble Code For Specific Cars

P07B7 Peugeot 204 ECU A/D Converter
P07B7 Mercedes-benz 15 Air Bag Driver Inflator Circuit Resistance Low on Squib - Loop #2
P07B7 Isdera 036
P07B7 Ferrari 360 Intake Air Temperature Circuit Low Input
P07B7 Porsche 986 Fuel level Sensor Circuit Low Input
P07B7 Oldsmobile Trofeo Damper LR Circuit Failure
P07B7 Adler 12 ABS Inlet Valve Coil RF Circuit Short To Ground