P0992 - OBD Trouble Code

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Improper shifts and reduced fuel economy are the major setbacks for this kind of problem. In extreme cases engine stalling and vehicle dying while slowing can be crucial on road and in extreme conditions. All these are an indication of a problematic transmission thus storing OBD code P0992 in the PCM (powertrain control module) and the check engine light getting on.

OBD Code P0992 means Transmission Fluid Pressure Sensor/Switch "F" Circuit Issue.

The computer determines when to shift up or down between gears based on throttle position vs. vehicle speed. The Powertrain Control Module (PCM) or Transmission Control Module (TCM) uses input from various sensors including Transmission Fluid Pressure Sensor to verify the correct operation of the transmission and its components. Engine speed is often calculated against the transmission speed sensor to determine gear ratio and torque converter slip. If the calculation does not match the desired value, the OBD code P0992 is set and the Malfunction Indicator Light gets flashed on the dashboard.

What causes this problem with the Transmission Fluid Pressure Sensor/Switch "F" Circuit?

• Low transmission fluid level
• Transmission Control Module Failure
• TFPS circuit faulty due to mechanical failure
• Faulty Shift Solenoids
• Open in the signal circuit to the TFPS sensor
• Short to voltage in the signal circuit to the TFPS sensor
• Short to ground in the signal circuit to the TFPS sensor
• Transmission mechanical problems
• Transmission hydraulic control circuit

1. Engine Control Module - Faulty ECM leads to engine stalling or not starting, and check engine lights being on. Replace damaged ECM now!
2. Powertrain Control Module - PCM related issues can hamper the fuel delivery system and engine performance. Find all the Powertrain related parts with us.
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4. Automatic Transmission Control Module - Auto TCM is important to check on the engine speed and torque converter. Thus, replace faulty components and replace them now!
5. Automatic Transmission Sensor - Automatic transmission sensor transmits correct information for the TCM to make various decision including gear shift and ensuring smooth drive in coordination with the engine. Thus, replace faulty components now!

If you are facing OBD error code P0992, then there are significant common symptoms that can be felt or observed. We have worked out a list here to help you out in understanding this problem better.

Common Symptoms

• Check Engine Light illuminated (Malfunction indicator lamp)
• Delayed shift or not shifting into gears
• Transmission slipping
• Loss of fuel economy

In some cases, there may be performance problems, such as dying when coming to a stop after driving on the freeway and/or misfire-like symptoms.

It is very important to fix the fault code P0992. So here are some ways with which you can correct this issue:

• Refill of Low transmission fluid level
• Dirty transmission fluid to be changed
• Faulty Shift Solenoids Replacement
• Replacement of TCM and PCM
• Repair or replace TFPS
• Repair or replace Shift Solenoids harness which is open or shorted
• Faulty Shift Solenoids circuit, electrical connection repair/replace

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If you want to easily diagnose this fault P0992 code, then all you have to do is to follow the steps which are mentioned below:

• A mechanic will first input an OBD-II code reader into the vehicle's computer in order to read and identify the trouble code.
• Feed a hydraulic pressure diagram into the proper opening in the transmission system in order to take pressure readings directly from the source.
• Test the transmission fluid with a dipstick and checked for problems. Compare any diagnostic findings with the car manufacturer's default specifications in order to pinpoint abnormalities.
• If there are other trouble codes registered on the OBD-II reader, it may offer additional guidance in finding the root problem.
• Check for scraping, rubbing, bare wires, burn spots or melted plastic in the TFPS and circuit and urns and corrosion over the connector terminal and make use of electrical contact cleaner to clean them.
• Before replacing the sensor, it is important to check for the reference voltage to the sensor and the module in on and off condition, if accordance to the appropriate range as per the car’s specification.
• Always check for PMC faults and repair, replace or reprogram as required.

Common Mistakes When Diagnosing the P0992 Code

Oftentimes the PCM sensor and circuit is blamed, and replaced, without checking the circuit as well as neglecting the damaged wiring and connectors. Because there can be several causes for this code, a complete inspection should be carried out in order to avoid repairs that may be unnecessary and more expensive.

• Transmission Control Module (TCM) failure
• Transmission fluid level is low
• Transmission fluid pressure sensor failure
• Wiring and connector issue