2.3L & 2.5L I4 Tech General discussion of 2.3L and 2.5L I4 Ford Ranger engines.

2.3l 2010 throwing o2 sensor, EGR, and Idle air control valve codes

Old Sep 6, 2023
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From: Springdale, Ar
2.3l 2010 throwing o2 sensor, EGR, and Idle air control valve codes

Hello all, my 2.3l just quit out on me yesterday itl start but inly when i keep the gas on and itl die after driving its throwing IAC code, 02 sensor code and egr,
what can this be?
 
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Old Sep 6, 2023
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What are the actual codes?
 
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Old Sep 6, 2023
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Po403 egr control circuit
p0443 evaporative emission system purge control valve circuit
po511 idle air control circuit
p0102 mass or volume air flow a circuit
p0141 o2 sensor heater circuit bank sensor 2
 
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Old Sep 6, 2023
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From: Everett, WA
Those are all "Circuit" codes, meaning wiring.

I would check the connection of the wire harness at the PCM, unplug it and make sure all pins are clean looking.
 
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Old Sep 6, 2023
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Could it be an o2 sensor throwing all of it off? The mass ir flow is new from last year
there is a vaccuum leak though too the ac dies when accelerating
 
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Old Aug 18, 2025
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Wow. I just posted the exact same thing. I see there have been no answers. I know that it's a wire grounding out somewhere as I get continuity when I test from the positive post to the ground. This is driving me crazy.
 
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