Logo

B1686 Engine Code Repair

Meaning of B1686 engine trouble code is a kind of body trouble code and B1686 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,140 and you can't do it yourself unless you're an experienced mechanic.

B1686 Fault Symptoms :

  1. Check engine light comes on
  2. Engine stalling or misfiring
  3. Engine performance issues
  4. Car not starting

If one of these reasons for B1686 code is occuring now you should check B1686 repair processes.
Now don't ask yourself; What should you do with B1686 code ?
The solution is here :

B1686 Possible Solution:

B1686 Engine

Excessive air inflow can be caused by a vacuum leak, a dirty sensor or, an exhaust gas recirculation valve not closing properly. If the problem is not enough fuel, the culprit may be dirty injectors or fuel filters, a weak fuel pump or a leaky fuel pressure regulator. The lean fuel mix error may be accompanied by rough idling, engine misfires, hesitation during acceleration and overall poor engine performance.

B1686 Code Meaning :

B
OBD-II Diagnostic Body (B) Trouble Code For Engine

1
Fuel And Air Metering

6
Fuel Composition Sensor Circuit Malfunction

8
Cylinder 10 Contribution/balance Fault

6
Crankshaft Position Sensor B Circuit Malfunction

Is the fuel pump sometimes not priming when you turn the key to ON(II)? Start by measuring the fuel pressure and checking whether you have bright white-bluish spark at all four plugs. The mechanical timing is also something that you should check, as we mentioned above.

B1686 OBD-II Diagnostic Body (B) Trouble Code Description

B1686 engine trouble code is about Crankshaft Position Sensor B Circuit Malfunction.

Main reason For B1686 Code

The reason of B1686 OBD-II Engine Trouble Code is Fuel Composition Sensor Circuit Malfunction.

B1686 DTCs may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.