P3688 Chrysler Panel OBD Code

OBD/2 P3688 error code description and symptoms.

HO2S Sensor Circuit Malfunction (HO2S-11) During testing the HO2S Heaters are checked for opens/shorts and excessive current draw.
The test fails when current draw exceeds a calibrated limit and/or an open or short is detected. Short to VPWR in harness or HO2S. Water in harness connector. Open VPWR circuit. Open GND circuit. Low battery voltage. Corrosion or poor mating terminals and wiring Damaged HO2S heater. Damaged PCM.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

P3688 Chrysler Panel Error Code Repair Process :

If your adaptive mode switch circuit failure check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P3688 and engine control unit are in charge of monitoring a bunch of different adaptive mode switch circuit failure, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Chrysler Panel P3688 OBD2 Code

A common cause of code P3688 is the failure of Adaptive Mode Switch Circuit Failure, but there are several other possible causes as well, such as ;

Exhaust tube
Engine Control Module (ECM)
Fuel injector leaks
Oil flow restriction in the oil passages or the VCT valve body

P3688 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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P3688 Chrysler Panel OBD Code

P3688 Chrysler Panel Error Code Repair Process :

Common Causes of Chrysler Panel P3688 OBD2 Code

P3688 code for other Chrysler cars