Logo

C3691 Engine Trouble Code

Meaning of C3691 engine trouble code is : C3691 code can be about replacing a broken oxygen sensor can eventually lead to a busted catalytic convertor which can cost upwards of $2,000. Taking your car into a shop will cost you around $200 depending on the car. However, an oxygen sensor is easy to replace on many cars and is usually detailed in the owner's manual. If you know where the sensor is, you only have to unclip the old sensor and replace it with a new one. Regardless of how you approach it, you should get this fixed right away.

C3691 Possible Solution:

C3691 Engine

Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. Spark plugs typically need to be replaced every season or 25 hours of use. You should also check that the spark plug gap is set properly. If your spark plugs look good, problems with your ignition system can also preventing a spark. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage.

C3691 Code Meaning :

C 3 6 9 1
OBD-II Diagnostic Chassis (C) Trouble Code For Engine Ignition System Or Misfire Fuel Temperature Sensor B Circuit Range/Performance Crankshaft Position Sensor A Circuit Malfunction Crankshaft Position Sensor A Circuit Low Input

Regarding the C3691 code, it would probably be worthwhile to carefully inspect the wire harness near the intake manifold bracket. This is done most easily from below the car in the area near the oil filter.

C3691 OBD-II Diagnostic Chassis (C) Trouble Code Description

C3691 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.

Reason For C3691 Code

The reason of C3691 OBD-II Engine Trouble Code is Fuel Temperature Sensor B Circuit Range/Performance.

C3691 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.