Engine-Codes - Dodge - P0888 Dodge

P0888 Dodge Code - Transmission Relay Always Off

- Code Popularity: 64,937 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

What are the Possible Causes of the Code P0888 Dodge?

  • Faulty Transmission Control Relay
  • Transmission Control Relay harness is open or shorted
  • Transmission Control Relay circuit poor electrical connection
  • Faulty Transmission Solenoid/Pressure Switch Assembly

How to Fix the P0888 Dodge Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Code P0888 Dodge Tech Notes

Inadequate Transmission Control Relay Output voltage can also cause DTCs P0846, P0869, P0871, P0876 or P0988 to set. This does not indicate an internal transmission or solenoid TRS problem. Repairing the P0888 fault should also eliminate the related DTCs.

Dodge Caravan

User Submitted Video

What is the Cost to Diagnose the Code P0888 Dodge?

Labor: 1.0

The cost to diagnose the P0888 Dodge code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

Does your Dodge have Safety Recalls? → Check here

When is the P0888 Dodge Code Detected?

This code is set when less than 3 volts are present at the Transmission Control Relay Output (switched battery) terminals at the Powertrain Control Module (PCM), when the PCM is energizing the relay.

What are Code P0888 Dodge Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P0888 Dodge Code Mean?

The transmission control relay is used to supply power to the solenoid pack when the transmission is in normal operating mode. When the relay is off, no power is supplied to the solenoid pack and the transmission is in Limp-in mode. The relay output is fed back to the Powertrain Control Module (PCM). It is referred to as the Transmission Control Relay Output circuit or switched battery.
After a controller reset (ignition key turned to the run position or after cranking engine), the controller energizes the relay. Prior to this the PCM verifies that the contacts are open by checking for no voltage at the switched battery terminals. After the relay is energized, the PCM monitors the terminals to verify that the voltage is greater than 3 volts.

P0888 Dodge Code - Transmission Relay Always Off

Need more Information on the P0888 Dodge Code?

Need more information on how to fix the P0888 Dodge code? Get Access to Factory Service Manuals

Need Help with the P0888 Dodge Code?

Get the P0888 Dodge code diagnosed by a professional: Find a repair shop in your area