Code issues after transmission replacement? The P1603 and U0101 codes?

MATTNZ

MEMBER
2006 MITSUBISHI OUTLANDER
2.6L
4WD
AUTOMATIC
115,000 MILES

Hi. My transmission stopped working so I purchased a second hand one. My neighbor installed it and is coming up with faults drive slow and service engine. It drives super slow in forward and reverse, almost no revs.

Sunday, June 4th, 2023 AT 9:53 PM

6 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,526 POSTS

What codes are they? It sounds like the fluid is low or you have an input shaft speed sensor that is not working.

here are two guides that can help with the location of the sensor in the images below:

https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid

and

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

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Monday, June 5th, 2023 AT 1:20 PM

MATTNZ

MEMBER
4 POSTS

Hi. I believe the speed sensors have been checked and Transmission fluid level is good.
I have a Bluetooth obi II scan which connects to my phone and the fault codes are.
P1603 - powertrain
U0101 - network

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Monday, June 5th, 2023 AT 2:18 PM

MATTNZ

MEMBER
4 POSTS

The network fault could be the main one as the powertrain fault only came up yesterday when I disconnected the battery.

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Monday, June 5th, 2023 AT 4:13 PM

KEN L

MASTER CERTIFIED MECHANIC
47,526 POSTS

Here is information on the codes:

P1603 code is a generic powertrain code that indicates a malfunction in the internal control module memory.

The U0101 code refers to a communication problem within the network of the vehicle.

So it seems like one of the main grounds was left off when the transmission works was done please double check the grounds around the transmission.

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Tuesday, June 6th, 2023 AT 8:08 AM

MATTNZ

MEMBER
4 POSTS

Hi, sorry for the late reply. I've had a back injury.
I have checked the main grounds, and they all seem to be in place. Tomorrow I will pick up a 2nd hand wiring harness so I can hopefully cancel that out over the coming days.