B0086 Diagnostic Trouble Code

B0086 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 B0086 diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
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.
Dirty air cleaner element Damaged DPF

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. 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. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code B0086 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 B0086.

Fortunately, B0086 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0086 Trouble Code For Specific Cars

B0086 Venturi Atlantique Pump Speed Signal Fault
B0086 Nissan Titan Cylinder #3 High To Low Side Short
B0086 Audi 5000 Alternative Fuel Controller
B0086 Singer Sm Invalid /fault data received (Non SCP)
B0086 Ultima Gtr Power Supply Sensor Circuit Open
B0086 Mikrus Mr ANTI THEFT HORN OUTPUT CIRCUIT Short to Gnd
B0086 Abarth 207