B0787 Diagnostic Trouble Code

B0787 is a kind of OBD-II Diagnostic B-Body 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 B0787 diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Dirty air cleaner element Damaged DPF

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 B0787 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 B0787.

Fortunately, B0787 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0787 Trouble Code For Specific Cars

B0787 Renault Trafic HO2S Heater Control Circuit High (Bank 1 Sensor 2)
B0787 Trident Clipper Passenger Side Crash Sensor Internal Fault
B0787 Packard Twelve Driver Door Handle Circuit Short To Battery
B0787 Delahaye Gfa Hydraulic Pressure Sensor Range/Performance
B0787 Mercedes B 180 ABS Hydraulic Pressure Differential Switch Input Short Circuit To Ground
B0787 Reliant Se6 Gate Select Position Circuit High
B0787 Porsche 964 Fuel Level Sensor B Range / Performance