My 2002 Ford Escape is poping up code p0420 and p1507 what is it?

2002 Hyundai Elantra DTC P1505 AND P1507 Engine Performance same as kia

call the dealer

Go to this URL: http://www.obd-codes.com/p0420 and look at the section titled "What does that mean". You will see several possible causes for this error code.

P1451--Evap Control System Canister Vent Solenoid
Circuit Malfunction
P1507-Idle Air Control Underspeed Error

Codes you get DO NOT tell you what to replace

They give you a place to start testing

You cannot do that

Testing requires special euipment
and knowledge

You need a repair shop

REPLACE YOU IAC VALVE! (IDLE AIR CONTROL VALVE).

possible problems

Vaccuum leak
failed IAC valve
open or short
air inlet plugged

P1507 means "Idle Air Control Underspeed Error". It can be most commonly caused by a vacuum leak, a damaged Idle Air Control (IAC) assembly or a stuck IAC valve that needs cleaning. Essentially, your engine isn't idling at high enough according to your computer's programming parameters. Many times this shows up in colder weather as you try and start your vehicle. It will usually die unless you put your foot on the gas pedal and raise the RPM's. I have also read where a clogged air filter might be the problem. I would try cleaning your IAC valve first.

Those codes don't indicate a failure of any particular sensor. They are codes for the bank 1 and bank 2 catalytic converters. The computer uses the oxygen sensors in front of and behind the catalytic converters to determine how well the converters are working. If the efficiency of the converters go below a specific threshold the computer will set the codes you got. Common repairs for this code include replacement of the catalytic converters (most common), failure of the front o2 sensors (slow switching rate) or a computer reprogram.

p500=Vehicle Speed Sensor Malfunction (VSS)
p1540=VSS Signal Too High
P1507= Vehicle speed/Idle Speed Actuator
Speed sensor is faulty or has a bad connection.

Here's what the code means, P0420 -- Catalyst System Efficiency Below Threshold (Bank 1).
Causes: Bad O2 senor, bad catalytic converter, and/or leaking exhaust manifold.


The error is coming from the O2 sensor number 1 between the exhaust manifold and the catalytic converter. The sensor itself may not be the problem. From what your describing is maybe a leak coming somewhere near the exhaust manifold. This would set off the P0420 code. Look around the exhaust manifold down to the catalytic converter for leaks that will leave black marks from burned fuel. If this can't be easily found, you may have to take the car in and have the exhaust hooked up to a smoke machine. This will inject smoke into the tail pipe and any leaks will be found by the smoke coming out of it.

Behind the brake mounting plate there is a small hole with a rubber plug on the top portion.

Remove the plug. Look from the back of the vehicle and you will see a star wheel in the hole. Stick

a long skinny screw driver with a large blade and rotate it in the direction of risistance.(clockwise).

You will hear a spring poping noise. Rotate a few times and the drums will turn freely.

Then you can slide the drums off.