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2008 Kia Spectra CEL: P2251
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StarStuff
New User
Mar 3, 2014, 2:25 PM
Post #1 of 7
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2008 Kia Spectra CEL: P2251
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I was getting the check engine light code P0032, which was due to one of these possible causes:
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 harness is open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse
- Faulty Engine Control Module (ECM)
Before I replaced the faulty O2 sensor, I disconnected the battery that way the computer could reset when I turned the car back on, with the new sensor in. Well I did this and when I turned the car on, no CEL, however, about 5 minutes on the road and I'm getting CEL again. This time the code read:
P2251
-Linear heated O2 sensor-bank 1, sensor 1 (HO2S11) reference ground circiut
Probable cause:
-Open or short circuit condition
- Poor electrical connection
- Failed HO2S11 (Bank 1 sensor 1)
It is worth noting I have driven the car about 100 miles and started it at least 30 times since replacing the O2 sensor.
Thanks!
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Hammer Time
Ultimate Carjunky
/ Moderator
Mar 3, 2014, 2:47 PM
Post #2 of 7
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Re: 2008 Kia Spectra CEL: P2251
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That's an 0/2 heater code. You have to verify power and ground arriving at the sensor on the like colored wires. If you have both, then you have a bad sensor.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Mar 3, 2014, 7:14 PM
Post #3 of 7
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Re: 2008 Kia Spectra CEL: P2251
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What brand and part number sensor did you put in it?
That last code you got basically means the computer thinks the reference ground circuit is open. It has nothing to do with the heater circuit. The only way to see how this sensor is functioning is with a high end scan tool. The engine controller sends small positive and negative amounts of current to the A/F sensor's pumping cell in attempts to balance the sensor. The amount of current that is used and its polarity is monitored by the PCM. This is how the PCM calculates the fuel/air mixture. The PCM converts the measurements it sees to a voltage value that is displayed on the scan tool. The voltage usually stays around 1.9-2.0 volts when the air fuel mixture is 14.7:1. If the voltage goes lower than 1.9-2.0 volts the engine is running rich, so the computer will take fuel away from the engine. If it goes higher than 1.9-2.0 volts it is running lean and the computer will add fuel to the engine.
The computer watches the voltage to make sure it goes around 3.2 volt or higher during decel when the injectors are turned off. This is because there is nothing, but a lot of O2 in the exhaust when the injectors are shut down. If the computer doesn't see the voltage go high or go beyond a certain threshold, it assumes the reference ground is open.
Inspect the O2 harness and connector on the harness end really good. Make sure you don't have any broken, damaged connector terminals or wiring.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Hammer Time
Ultimate Carjunky
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Mar 3, 2014, 7:22 PM
Post #4 of 7
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Re: 2008 Kia Spectra CEL: P2251
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Yep, I didn't look into it far enough. DS will take it from here.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
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Mar 3, 2014, 7:29 PM
Post #5 of 7
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Re: 2008 Kia Spectra CEL: P2251
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LOL...thanks.
Just think of it as a MAF sensor. That is how I remember how it works. MAF sensor electronics control the amount of current to the MAF hot wire. The amount of current used to keep the wire hot is then converted to a linear or digital signal that the engine computer uses to determine how much air is flowing into the engine.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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StarStuff
New User
Mar 3, 2014, 8:26 PM
Post #6 of 7
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Re: 2008 Kia Spectra CEL: P2251
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Thank you for the reply!
This is the exact O2 sensor I installed:
link deleted ........................ not allowed
I took it to a mechanic today and he measured the voltage(or something electrical) on the O2 sensor and said it was fine, although he said he wasn't an expert in electrical and that I should get a second opinion. Once again, thank you for the input and any further information would be greatly appreciated!
(This post was edited by Hammer Time on Mar 4, 2014, 3:25 AM)
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Discretesignals
Ultimate Carjunky
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Mar 3, 2014, 9:00 PM
Post #7 of 7
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Re: 2008 Kia Spectra CEL: P2251
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That sensor could be a chinese knockoff. Never heard of the company (Replacement) that makes it.
Get yourself a dealer OEM, NTK, or Denso sensor.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Mar 3, 2014, 9:24 PM)
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