Question about 1999 Mercury Mountaineer

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P1450 and p0133

What are these codes for?

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  • phillip harris Nov 06, 2012

    I have a 1999 Mercury Mountaineer and I got the codes p1450 and p0133 can someone please tell me what these mean?



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This POST describes the P1450 - Evap and fuel tank related.

P0133 is: Oxygen Sensor Circuit Slow Response (Bank1, Sensor1)

Your 02 sensor is likely worn out. Your Merc is 13 years old and is likely due. You do NOT have to buy from the dealer, as they can be bought online for much less, if you can replace it yourself. Usually just a wrench and connector needs unplugged, but depends on where they are located on the exhaust.


Posted on Nov 06, 2012

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P0133 Is an O2 sensor CKT Slow response (Bank 1 Sensor1). I don't have the P1450.

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Hope this helps you out.

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1997 mercury mountaineer code p1450

Hi there:
The first thing that I suggest could be replace the gas cap; also check a possible defective EVAP (Evaporative Emission Canister Vent solenoid). HERE the instructions.

DTC P1450 - Unable to Bleed Up Fuel Tank Vacuum
Monitors the fuel vapor vacuum and pressure in the fuel tank. The system failure occurs when the EVAP running loss monitor detects excessive fuel tank vacuum with the engine running (but not at idle).

Keep in mind that, if problem persists you will need a smoke machine to properly diagnose.

Hope this helps.

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