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P0882 – What Does It Mean and How To Fix It

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.

Definition

P0882 is an OBD-II Code that refers to TCM Power Input Signal Low

Meaning

A P0882 code is a generic diagnostic trouble code that occurs when the PCM/ECM receives a signal indicating an issue referring to the automatic transmission control system not getting enough power by a mechanical or electrical failure. 

It will activate the Check Engine light and save the code if the PCM detects a problem.

Causes

Common causes for this code include:

  • Faulty relay or blown fuse (fusible link)
  • Open or shorted circuits
  • Failure with the vehicle speed sensor 
  • CAN Mechanical transmission failure 
  • Bad TCM, PCM (Rare)

Symptoms

The symptoms of a P0882 code are:

  • Illuminated Check Engine Light 
  • Traction control has been disabled manually
  • The transmission can't shift.
  • Shift patterns that are erratic
  • ABS turned off

Diagnosis

To diagnose a P0882 DTC code, a technician would:

  1. Scan for codes in the ECM and look at the freeze frame data for failure.
  2. Visually inspect the wiring and connectors for damage, shorts, and opens.
  3. Test the voltage and resistance of circuits, relays, and switches.
  4. Check the operation of the vehicle speed sensor.
  5. Check the transmission fluid level and condition. 
  6. Check the TCM for proper function.
  7. Check the PCM for proper function.

Common mistakes

The following are some of the most common mistakes that a technician may make when diagnosing a P0882 code:

  • Not thoroughly inspecting all the wiring and connectors.
  • Not checking the voltage and resistance of circuits, relays, and switches.
  • Not checking the operation of the vehicle speed sensor.
  • Not checking the transmission fluid level and condition.
  • Not checking the TCM for proper function.
  • Not checking the PCM for proper function.

How serious is this?

A P0882 code is thought to be a relatively serious code, as it can indicate a failure with the TCM or PCM. However, many times there is another cause for the code, such as a relay or fuse.

What repairs can fix the code?

The following are solutions that may fix this problem:

  • Changing the battery
  • Replacing the sensor's connector
  • Alternator replacement
  • Starter motor replacement
  • Connectors, circuits, fuses, and wires in adjacent circuits are replaced or repaired

Related codes

A P0882 is related to and may be accompanied by the following codes:

P0880:TCM Power Input Signal High

P0756: Shift Solenoid "B" Performance or Stuck Off

P0760: Shift Solenoid "C" Performance or Stuck Off

P0138: 02 Sensor Circuit High Voltage (Bank 1 Sensor 2)

P0158: 02 Sensor Circuit High

Conclusion

In conclusion, the P0882 code is a diagnostic trouble code that refers to a problem with the TCM not getting enough power. It will activate the Check Engine light and save the code if the PCM detects a problem. There are many possible causes for this code, but some of the more common ones include a faulty relay or blown fuse, open or shorted circuits, failure with the vehicle speed sensor, CAN Mechanical transmission failure, bad TCM, or PCM.