P08B7 Diagnostic Trouble Code

P08B7 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 P08B7 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
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.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. 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 P08B7 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 P08B7.

Fortunately, P08B7 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P08B7 Trouble Code For Specific Cars

P08B7 Daewoo No 1
P08B7 Renault 8 Gear Lever Y Position Circuit Intermittent
P08B7 Mercedes-benz G Class Air Suspension Disable Switch Circuit Short To Battery
P08B7 Fiat Multipla Lamp Turn Signal Left Circuit Short To Ground
P08B7 Durant Star Immobilizer Code Not Programmed
P08B7 Toyota Brevis O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3)
P08B7 Ac 5 AAI Circuit Malfunction