The transmission control module (TCM) on a 2002 Dodge Neon is located on the passenger side of the engine compartment, near the firewall. It is a small, black box with multiple electrical connectors.
Neon Won’t Shift Out of First Gear:
If your Neon is stuck in first gear, it could be due to several reasons, including a malfunctioning Transmission Range Sensor, a faulty Manual Valve Shaft or an issue with the Automatic Transmission Control Module.
Here’s a general troubleshooting guide to diagnose the issue:
1. Check Transmission Fluid: Ensure that the transmission fluid is at the proper level and is clean. If the fluid is low or dirty, adding or changing it may resolve the shifting issue.
2. Check Sensors: Inspect the Transmission Range Sensor and other relevant sensors for damage, wear, or corrosion. Replace any faulty sensors.
3. Inspect Linkage and Shift Cable: Check the shift cable and linkage for proper movement and make sure they are not loose or broken.
4. Check Manual Valve Shaft: Verify that the Manual Valve Shaft is properly adjusted. Incorrect adjustment can cause shifting problems.
5. Check Automatic Transmission Control Module (TCM): If all the above points are okay and the transmission still doesn’t shift, the Transmission Control Module (TCM) may be the issue. You may need to have the TCM diagnosed by a professional.
6. Seek Professional Help: If the problem persists or if you’re not comfortable troubleshooting yourself, it’s advisable to have a certified mechanic inspect and fix the issue.
