Engine-CodesDodge – P0888 Dodge

P0888 Dodge Code - Transmission Relay Always Off

Quick Answer

The P0888 code in Dodge vehicles specifically indicates a transmission relay that is always off. Common causes include Faulty wiring or connections in the transmission relay circuit, Malfunctioning transmission relay, Issues with the PCM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0888 Dodge indicates Transmission Relay Always Off.
Common causes
Common causes include Faulty wiring or connections in the transmission relay circuit, Malfunctioning transmission relay, Issues with the PCM.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P0888 Dodge Description

The P0888 code in Dodge vehicles specifically indicates a transmission relay that is always off. This means that the powertrain control module (PCM) has detected a problem with the transmission relay circuit where it is not receiving the expected signal indicating that the relay is functioning properly. The transmission relay is responsible for controlling the power supply to the transmission solenoids, which play a crucial role in shifting gears and overall transmission operation.

OBDII Code P0888 Dodge - Transmission Relay Always Off
P0888 Dodge Code - Transmission Relay Always Off

Common Causes of P0888 Dodge

  1. Faulty wiring or connections in the transmission relay circuit
  2. Malfunctioning transmission relay
  3. Issues with the PCM
  4. Problems with the transmission solenoids
  5. Electrical issues such as corrosion or short circuits

Symptoms of P0888 Dodge

  1. Delayed or harsh shifting
  2. Gear slippage
  3. Transmission not engaging properly
  4. Check Engine Light illuminated
  5. Reduced fuel efficiency

How to Fix P0888 Dodge

  1. Begin by using a diagnostic scanner to retrieve the specific code and identify the underlying cause of the issue.
  2. Inspect the transmission relay circuit, wiring, and connections for any signs of damage or corrosion. Repair or replace any faulty components as needed.
  3. Test the transmission relay to ensure it is functioning correctly. Replace the relay if it is found to be faulty.
  4. Check the PCM for any signs of damage or malfunction. If necessary, reprogram or replace the PCM to resolve the issue.
  5. Test drive the vehicle to ensure that the transmission is shifting properly and that the code does not return.

Cost to Fix P0888 Dodge

The cost of repairing a P0888 code in a Dodge vehicle can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the parts for this repair could range from $50 to $200, while labor costs could range from $100 to $300. Keep in mind that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your location and vehicle.

Tech Notes for P0888 Dodge

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

When is the 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.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0888 Dodge Code

No Frequently Asked Questions about P0888 Dodge Code found.

Discuss the causes and fixes for P0888 Dodge OBDII Code

  • What could be? The alternator isn't send the wrong voltage? Where can I find the transmission sensor circuit or the transmission control relay? Thx

  • What model and year is your Dodge?

  • Having the same problem ,I own a 2004 dodge neon sxt , and the code appeared p0888 n p0700 ,how could I fix this ?any advice is truly appreciate

  • You could start by replacing the Transmission Control Relay.

  • that was great video , thank you ....
    quick question if you guys are still around :
    I have 2005 Dodge Grand Caravan sxt with 3.8 engine
    my computer in the front bumper its not the one with 60 pin and I can't seem to be able to find the schematics
    im getting 2 codes P0888 and P0700 right after one of my mechanics was changing the power stearing line
    if there is a link I could find that schematic like one of them in your video that would be great
    thank you

  • I not aware of any free site that provide the schematics, only one I know is the pay service from alldata: http://www.alldatadiy.com/?...

    If you are a bit more specific of the diagram you want I may be able to help you.

  • Thank you for your prompt response. I've ménage to go to my local Part Store and got the printout of the locations of the wires ( just like ur video) and I've had exactly same situation as in this video. About year ago dealer had to replace the computer on my van and where they did some wire repairs I've open it and sure enough.... Had 2 wires to replace. Codes P0700 and P0888 were gone. Tranny works as new .
    Once again thank you for this video

  • Good day, I have 2004 model Dodge caravan, the gear is in limbo mode and I am getting P0888.
    Please how do i fix the fault. I am contacting you from Nigeria.

  • Start by replacing the transmission relay.

  • I have an 05 same motor as yours so I'm curious where your wiring was damaged. I can't seem to find mine but if it's a common problem then maybe mines been repaired before as well! And maybe in the same spot if it's due to a rub or faulty design