Transmission Warning Lights Due to Fluid Loss

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Transmission Warning Lights Due to Fluid Loss

Several X70 users are concerned about transmission warning lights appearing on the dashboard after noticing fluid stains o r noticing changes in shifting feel. How can a loss of transmission fluid lead to warning alerts, what diagnostic checks should be performed to confirm a leak e.g., seals, cooler lines, pan gasket, and what repair o r maintenance procedures are typically recommended to restore safe transmission operation?

Talha Kyanii asked on 19 Dec 2025 12:33:41 pm

1 Answer

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Gari Master - on 19 Dec 2025 12:35:47 pm

Yes — loss of transmission fluid can lead to dashboard warnings and abnormal shifting behavior in the Proton X70.

How fluid loss causes warnings:

Most modern transmissions including the X70’s automatic/DCT rely on hydraulic pressure to shift smoothly.

Low fluid → low pressure → the Transmission Control Module TCM detects abnormal conditions and may illuminate transmission o r check‑engine lights.

You might also feel slipping gears, delayed engagements, harsh shifts, o r limp mode.

Diagnostics to confirm a leak:

OBD‑II scan: to read any transmission‑related trouble codes that often appear when fluid loss affects sensors.

Visual inspection: for wet areas around seals, cooler lines, o r the pan.

Fluid colour and smell check: burnt smell o r darkened transmission fluid suggests overheating and breakdown due to leaks.

Repair & maintenance:

Replace the faulty seal, gasket, o r hose causing the leak.

Flush and replace old fluid if it’s degraded.

Reset any codes after repair.

Re‑check fluid level as per recommended procedure.