176 System indicates lean (bank no. 2)

How to read it

Code 176 reads as 1 flash, pause, 7 flashes, pause, 6 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 176 mean?

176. System indicates lean (bank no. 2). This code sets when your vehicle computer detects system indicates lean (bank no. 2).

Common causes of 176

• Intake leak
• Fuel pressure low
• Fuel filter/pump
• Injectors
• HO2S
• AIR system
• MAP sensor
• ECM

How to fix 176

1. Check for an intake leak
2. Measure fuel pressure and compare it with the spec: this fault reads low
3. Check the fuel filter and the fuel pump delivery
4. Check the injectors for a clogged or a leaking one
5. Test the HO2S and replace it only if it fails its own test
6. Check the AIR system for a stuck valve, a blocked passage or a dead pump
7. Test the MAP sensor and replace it only if it fails its own test
8. Test the ECM last, only after every circuit test has passed
9. Clear the code, then retest to confirm the fix holds