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21:28:18 - 04/18/2024
V8 Dakotas
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Seany B
Dodge Dakota
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8/28/2008
03:44:17
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 Subject: O2 Heater Circuit Short?
IP: Logged
Message:
After SEVERAL agonizing trips to the stealership, I'm still having issues with my Kota...It won't pass smog because it throws up a Check Engine Light. Initially was getting a "No Bus" error. Was told to replace PCM -Did it - Still won't pass. - Stealer had truck for 12 days, told me it was either CTM (Central Timing Module) or a short somewhere. Replaced CTM, No More "No Bus" error, A/C now works again, STILL have no Overhead console functions, no interior lights, and WON'T PASS SMOG! Keep getting "O2 Sensor Heater Malfunction" error...On 3 of the 4 Sensors...Has to be a short, right?! Also, noticed alot of corrosion forming on Pos Batt Terminal. Now, my ? - Where is the O2 Sensor Heater located, and where is the wiring, so I can check entire circuit... Thanks for hangin with me for this long, any help much appreciated...
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Lee
Dodge Dakota
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8/28/2008
11:24:17
| RE: O2 Heater Circuit Short?
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Message:
The heater is in each sensor. The purpose is to heat the sensors up to operating temperature as quickly as possible, as they are designed to work when hot. I had a Check Engine Light once that told me the heater circuit had failed in one of the sensors. I replaced the bad sensor, cleared the codes, and everything has been good since. I agree that the problem you are seeing sounds like more than just a bad sensor. Each sensor has three wires. One of them is for the heater circuit. Sorry I couldn't be more help.
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jjj
Dodge Dakota
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8/31/2008
00:17:25
| RE: O2 Heater Circuit Short?
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Message:
Depending on the year, there are 3 OR 4 wires to the O2. It could be a ground, power splice, 3 bad sensors, or mice chewing on the wires. Mice like O2 sensor wires for some reason???
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