Hey what’s up fellow ranger dudes my name is Tim I’m new here. I don’t exactly know how this works so I’m just gonna state what my issue is. I got a 2001 ranger 2.5l about 6 months ago I dropped a new used motor (2.5l with 87,000 miles) in my truck. After putting everything back together the truck runs great, but my. Check engine light is on I hook up the obd and it spits out 5 codes
1. P1451- Evaporative Emissions system vent control circuit.
2. P1506- (IAC) valve duty cycle higher than expected (I replaced the IAC)
3. P0135- O2 heater circuit bank 1 sensor 1 (I replaced this sensor)
4. P0141- O2 heater circuit (bank 1 sensor 2) (I replaced this sensor too.
5. P1409- egr vacuum regulator solenoid circuit.

i replaced 2,3,and 4 and check engine light is still on spitting out the same codes but the truck runs great. Has anyone encountered these challenges while working on ur ranger. Any feed would be greatly appreciated. Thank you guys.

the LoneRanger1904

 

4 of your codes P1451, P0135, P0141, P1409 all have a key word in their description, "Circuit", meaning you have an electrical problem with them.

Check that all your ground wires are hooked up, Battery to engine and Radiator support, Engine to fire wall.
Possibly pinched wires between engine and transmission.

Your P1506, get your engine up to operating temperature, with engine running, unplug your IAC, idle speed should drop to below 600rpm possibly so low engine dies,
If it doesn't you have a vacuum leak.

 

Thank you so much 2011Supercab. But where can I look to find where all the ground points are?