P0687 Diagnostic Trouble Code

P0687 is a kind of OBD-II Diagnostic P-Powertrain 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 P0687 diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Diminished fuel efficiency

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code P0687 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 P0687.

Fortunately, P0687 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0687 Trouble Code For Specific Cars

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P0687 Tracta Tracta Passenger Side Airbag Fault
P0687 Overland 41 Double Lock Timeout Failure
P0687 Rene-bonnet Le Mans HO2S Heater Resistance (Bank 2 Sensor 2)
P0687 Skoda Rapid Lack Of HO2S Switch - Adaptive Fuel At Limit
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