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Heated Catalyst Battery Voltage or Current too Low During He

Tiny
DOUG MANN
  • MEMBER
  • MITSUBISHI
2001 Mitsubishi Galant ES
V6
70,040 Current Miles

Could you please clarify exactly what the Subject Matter means by definition that is understandable to the home mechanic.

I took the car for a smog today and this was the one and only reason that it did not "pass". I am hoping that this is something I can repair myself.

Thanks for the assistance.

Doug Mann
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Saturday, November 24th, 2007 AT 7:45 PM

3 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
The exact code would be easier to decipher for you. Sounds like a voltage problem at the heated o2 sensor, problem is there is more than one of them.
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Sunday, November 25th, 2007 AT 7:42 AM
Tiny
DOUG MANN
  • MEMBER
  • 2 POSTS
2001 Mitsubishi Galant ES
V6
70,040 Current Miles

Your response was that if you had the exact code it would be easier to decipher. The exact OBD Code given was P1400, can you give a bit more information with regard to this code. The car has 4 o2 sensors in all. Any help is greatly apprecaited.

Kind Regards,
Doug Mann
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Tuesday, November 27th, 2007 AT 8:48 PM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
P1400 isnt an o2 sensor code, it is "Manifold Differential Pressure Sensor Circuit Malfunction".
The three probable causes for that code are
1- MDP sensor failure
2- Open or short in the MDP circuit
3- PCM failure
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Wednesday, November 28th, 2007 AT 7:28 AM

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