P0388 OBD Error Code: Problem & Solutions

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The P0388 trouble code is detected when the crankshaft position sensor signal is sent to the engine control module during the first few seconds of the engine cranking is extremely high.

This error code can be described as Crankshaft Position Sensor b Circuit High Input.

The crankshaft position sensor is an electronic device which is used by the car engine to record the spinning rate of the crankshaft. The engine control module would then use this information to control the ignition as well as fuel ignition. In the sensor system there is a rotating part, a disc and the actual sensor.

What causes this problem with the Crankshaft Position Sensor B Circuit High Input?

• The CPS connector might be faulty
• Defaults in the crankshaft position sensor
• Wiring deterioration due to exposure to engine oil leaks
• There can be missing teeth or damaged reluctor ring
• The timing belt might be broken which can damage CPS components
• Opened or shorted crankshaft position sensor harness
• Bad electrical connection in the crankshaft position sensor circuit
• Signal plate might be damaged
• Quirks in the starter motor
• The car battery might be weak

1. Fuel Injector - Do you remember when was the last time you got your car Fuel Injector checked up? A defective Fuel Injector can cause a lot of issues like displaying P0388 code.
2. Powertrain Control Module - Poor Powertrain Control Module can cause a lot of difficulties, so why not get it replaced at time?
3. Battery & Electrical System Parts - Are there some faults in your Car Battery & Electrical System Parts? Don’t waste time and get them replaced or else P0388 code can turn up.
4. Engine Control Module - OBD Code P0388 can appear because of faulty Engine Control Module.
5. Crankshaft Position Sensor - Everything is fine with Crankshaft Position Sensor and still P0388 code triggering? Then you must get your Crankshaft Position Sensor checked.
6. Timing Belt - There can be some issues with the Timing Belt due to which you may see P0388 code appearing over and over again. Visit us to buy best quality Timing Belt online.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P0388 code by mentioning some major symptoms below:

Common Symptoms

• The Check Engine light can start turning ON
• Intermittent stalling
• The car may not be able to start properly
• Intermittent engine misfires
• There can be lack or loss of engine power
• Issue of rough idling
• The overall fuel economy might start decreasing
• Choppy acceleration

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P0388:

• You can always replace a damaged or failed crankshaft position sensor
• There can be some wiring problems, corrosion and connector problems, so the damaged parts should be repaired or replaced as per the need

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of rpm, reluctor ring, timing components and many more. Now all your problems would vanish within no time.

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

• If you want to diagnose this problem, then you should connect an OBD II scanner to the car’s computer and read all codes stored
• After that the codes should be cleared and the vehicle should be taken out for a test drive to verify the symptoms and determine if the code will reset
• The mechanic should also watch the RPM gauge during cranking and engine operation to determine if it is accurate, or not working
• If you will connect a scanner then it would also allow the mechanic to view the RPM signal from the sensor independent of the PM gauge or when there is no RPM gauge in the vehicle
• The CPS can also be tested directly for reference voltage. If it fails, the sensor must be replaced. If the sensor passes, then the problem is in the wires, wiring harness or connectors
• A full visual inspection of all components must be conducted, and any damage must be repaired. The teeth or reluctor ring should also be inspected for damage, and replaced if any is noticed
• Once the problem has been repaired, the codes must be cleared again, and the vehicle test driven once more. Note that it may require more than one test drive to set a code

Common Mistakes When Diagnosing The P0388 Code

A common mistake which is made by a lot of people is that they do not inspect the wiring, wiring harness and connectors first and they directly replace the crankshaft position sensor