Question about 2003 Ford Ranger Regular Cab

2 Answers

I have 6 cyl 03 ford ranger, check engine light came on and had it read and code says po422 EVAP, any help would be appreciated

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2 Answers

PO422 - is A failed Exhaust Converter (Bank 1)

Your truck shouldn't have that problem after 8 years,
unless you have had ignition misfires for years or a
rich condition, either of which set no MIL Lamp or
you didn't experience any drivability issues.

I would start by checking fuel pressure

Then if the O2 sensors are over 100,000 miles,
replace the ones closest to the engine

You really should put an oscilloscope on them,
before replacing, to see how well they switch

The rear O2 Sensors are what is setting the MIL
Lamp. If they move around voltage wise on a scope,
your converter is shot,but why?

Your spark plugs shouldn't be in there over 60 to70,000 miles

Clean MAF Sensor once a year with CRC MAF Cleaner

Check for vacuum leaks-best way is an EVAP Smoke Machine
Do the entire vehicle,EVAP System as well

Also engine Temp is important & all related thermostat,sensors
etc working correctly

Posted on May 23, 2011

  • Anonymous May 23, 2011

    Unless your not into or experience in auto repairs I will
    add that as was said, the converters are only affordable
    if you install yourself. Way too expensive to have a shop
    do your exhaust work.


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  • 273 Answers

The catalytic converter is no longer functioning properly
An oxygen sensor is not reading (functioning) properly
There is an exhaust leak

Sometimes simply resetting the code is all you need to do. Many codes will reset themselves over time. What the person meant was that in normal driving the code may reset itself. You don't need to waste your time or fuel driving nowhere to attempt to reset the code.

Personally, here is what I would do if I were you. If the place in Texas where you are moving to does not require emissions testing, do nothing for now. If the car seems to be running normally the code may reset itself. If Texas requires emissions testing you will need to have the problem addressed or the car will not pass emissions. Bring the car to a reputable independent mechanic for repairs. If it is your catylitic converter expect some sticker shock as these can be expensive. Hope this helps, Please rate this!!! :) James Booth

Posted on May 23, 2011


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Posted on Jan 02, 2017

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1 Answer

Code P0455

Ford error code P0455
- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
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The P0455 it's a very common code, because the code is set if the gas cap is loose or missing. Start by tighten the gas cap and clearing the code. In most cases the code can be clear by disconnecting the car battery for about 30 minutes.

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I have a 2006 Ford Ranger Sport Extented Cab. Emission System Light comes on, I had it checked it read fuel cap, so I repaced it.Went off ,& now back on .Unplu the Battery, went now bac on

You will have to have the codes read again. There may be another problem. If it is the same code , small leak. Then the evap system needs to be checked. Evap consists of the cap, gas tank, the seal for the sending unit, Charcoal canister, hoses running from the tank to the engine, purge and vents solenoids and their seals.

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2002 Ford Ranger check engine light indicating misfire

Code P0301
Ignition Coil Pack
Ignition Cable
Spark plug
Clog or dirty fuel injector
Evap canister purge valve
Engine Compression
fuel pressure

you have 3 type of engine for your truck
2.3L 4 cylinder
3.0L 6 Cylinder
4.0L 6 Cylinder

need to know that type Engine

The reason why the service light come on because it is a hard code
not a soft code.

Let me know

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This totally could be the problem in this video

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yes it is, could be the evap purge valve solenoid, the evap vent valve solenoid, or a just a plain leak somewhere in system.

Mar 16, 2009 | 2003 Ford Ranger Regular Cab

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1995 Ford Ranger ( engine light ) and stuff need help plz

if your obd2 scanner fits the connection you have obd2, obd1 connector is way differnt.

your code p1443
Control System
Canister Purge
Valve (Mechanical)
Monitors the fuel vapor
flow between the
engine intake manifold
and the EVAP
canister. The system
failure occurs when a
leak or blockage
between the intake
manifold, the EVAP
canister purge valve
and the EVAP canister
is detected by the
l Pinched, blocked or
plugged fuel vapor
tubes/hoses (except
between fuel tank and
EVAP canister)
l Damaged EVAP
l Disconnected, cracked
or cut fuel vapor
tubes/hoses (except
between fuel tank and
EVAP canister)
l Damaged EVAP
canister purge valve
Check for audible vacuum
noise in the engine
compartment or significant
fuel odor in the engine
compartment or near the
EVAP canister.

This link has all the codes you need.

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2 Answers

I have two check engine lights on P0303 and P0422

A good start would be to go you the Diagnostic Trouble Codes list at

The DTC's, also known as fault codes, may have other meanings but the list above should point you in the right direction.

Hope this helps - if so a rating would be really appreciated. If is doesn't then "add a comment" instead and I will try to help you further.
Cheers D..

Jul 04, 2008 | 1999 Volkswagen Beetle

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