Ford 490 Gear shift 1-2 malfunction

How to read it

Code 490 reads as 4 flashes, pause, 9 flashes, pause, 0 flashes on the check-engine light. Jumper the self-test input to signal return at the test connector, then run the key on engine off self test and the running self test, counting the check-engine flashes each time.

What does Ford code 490 mean?

Gear shift 1-2 malfunction

Common causes of 490

• Low or worn automatic transmission fluid that lets the 1-2 shift slip
• A transmission range sensor out of adjustment or reading the wrong position
• A poor connection or damaged wire in the shift solenoid circuit
• Worn clutch packs that slip on the 1-2 shift
• An internal fault in the PCM shift control

How to fix 490

1. Check the transmission fluid level and condition, and watch for slip on the 1-2 shift
2. Check the range sensor adjustment and the linkage
3. Check the shift solenoid connector pins and wiring for damage
4. Test the range sensor and replace it only if it fails its own test
5. Test the PCM last, only after every circuit test has passed
6. Clear the code, then retest to confirm the fix holds

Source

Qualified source review