P0699 OBD Error Code: Problem & Solutions

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The fault code P0699 can be identified as Sensor Reference Voltage “C” Circuit High. A P0699 code indicates that there is some fault in the sensor reference voltage “C” circuit. CAN stands for controller area network which would supply its sensors with a 5-volt reference voltage.

Want to learn something more about this fault code?

This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model.

What causes this problem with the Sensor Reference Voltage “C” Circuit High?

• Defects in the engine control module
• There can be bad electrical connection in the ECM circuit
• The sensor on 5 volt circuit might be shorted
• ECM harness might be opened or shorted

1. Engine Control Module - Defective car Engine Control Module can be a major reason why P0699 code depicts. So, make sure to replace it online so that you don’t have to face any further issues.
2. Auto Transmission Shift Solenoid - Everything is okay with the Engine Control Module and still OBD code P0699 triggering? Then there must be some defects in Auto Transmission Shift Solenoid. Replace them as soon as possible.
3. Automatic Transmission Sensor - P0699 code flashing? Get your Automatic Transmission Sensor inspected from a mechanic.
4. Electric Cooling Fan - If everything is alright with PCM, then there is surely some defect in Electric Cooling Fan. Get it replaced before the situation gets worse.
5. Radiator Fan Assembly - P0699 code can display due to some issues in the Radiator Fan Assembly. So, it is very important to replace the Radiator Fan Assembly with us at equitable prices.
6. Electronic Control Unit - Do you remember when was the last time you got your car Electronic Control Unit checked up? A dirty Electronic Control Unit can cause a lot of issues like displaying P0699 code.
7. Powertrain Control Module - Poor Powertrain Control Module can cause a lot of difficulties, so why not get it replaced at time?

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• The engine light can start turning ON
• There can be hard start/no start
• Car engine may run roughly
• Car engine car start misfiring
• Decrease in the overall fuel economy
• Lack of power

The repairs which you will have to do to correct this fault code are simply straightforward; you can surely pinpoint the necessary repairs on the basis of your diagnosis. Have a look at some common fixes:

• First of all, you must repair the damaged wiring, connectors, components
• If there are some faults in the sensors/processors in the CAN system, then they can be repaired or replaced

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Here are some steps which you should follow in order to diagnose this fault code:

An OBD-II scanner/code reader and digital volt/ohmmeter will be necessary for diagnosis and repair. A technician will also need a memory device of some sort for backup, should the PCM and any other controllers lose their information and require reprogramming. A detailed factory wiring diagram and schematic of all the CAN processors will also be a must.

You must begin your diagnosis with a careful visual inspection of the connectors as well as wiring. Repair/replace any damaged, disconnected, shorted or corroded wiring or connectors. After that the system should be retested

If wiring, connectors and components appear to be in good working condition, then you should connect the scanner to the diagnostic port and record any stored codes. Freeze frame the data. It would be very helpful in tracking down any intermittent conditions that may have been the cause of the code being stored

The vehicle should be taken out for a test drive and see if codes return. If the code does not immediately return, it could be an intermittent problem. Intermittent can be quite tricky to diagnose and may need to be allowed to worsen and return before a correct diagnosis can be made. Search for loose or disconnected engine or transmission ground cables, straps or wires, sometimes left disconnected after a repair job

Common Mistakes When Diagnosing The P0699 Code

• If there is a CAN-equipped vehicle, then the trouble code P0699 can start appearing because of a reaction to a communications failure between modules
• Due to this there would be a misinterpretation in the code and a big mistake of replacing the components that have nothing to do with the CAN