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P1688 Engine Trouble Code

Meaning of P1688 engine trouble code is a kind of powertrain trouble code and P1688 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.

P1688 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 P1688 code is occuring now you should check P1688 repair processes.
Now don't ask yourself; What should you do with P1688 code ?
The solution is here :

P1688 Possible Solution:

P1688 Engine

Power Steering Pressure (PSP) Switch Malfunction In Key On, Engine Off Self-Test, this DTC indicates the PSP input to the PCM is high. In Key On, Engine Running Self-Test, this DTC indicates that the PSP input did not change state. Steering wheel must be turned during Key On, Engine Running Self-Test PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged.

P1688 Code Meaning :

P 1 6 8 8
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Fuel And Air Metering Fuel Temperature Sensor B Circuit Range/Performance Ignition/Distributor Engine Speed Input Circuit Malfunction Clutch Position Sensor Circuit Malfunction

Regarding the P1688 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.

P1688 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P1688 engine trouble code is about Clutch Position Sensor Circuit Malfunction.

Main reason For P1688 Code

The reason of P1688 OBD-II Engine Trouble Code is Fuel Temperature Sensor B Circuit Range/Performance.

P1688 DTC reports a sensor fault, replacement of the sensor is unlikely to resolve the underlying problem. The fault is most likely to be caused by the systems that the sensor is monitoring, but might even be caused by the wiring to the sensor itself.