Check Transmission Light With Code 37 on Isuzu Trooper

Submitted by Jim Taddei · May 29, 2025
Published by RepairPal

Problem overview

The check transmission light may illuminate with a stored code 37. This is commonly caused by electrical interference on the data communication circuit between the transmission control module (TCM) and the engine control module (ECM). Our technicians recommend that all related connection and ground locations should be inspected and repaired as necessary. In some cases electromagnetic interference may be the cause, shielding of the affected wiring may be of help it this case.

28 people reported this problem
5 comments
Schedule Repair

Search for another problem

RepairPal Car Genius

Ask our experts about your Isuzu.

RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.

 Auto Repair Expert Auto Repair Expert

Call us at 877-913-1554

Available 9am – 6pm ET Monday through Friday

Call Our Experts