so i was driving to work today and when i stopped at a red light i noticed my signal was hyperblinking (led bulbs) and the heater blower slowed down, i check the volt gauge it was down to 13- instead of 15+ as usual. the light turned green and the second i touch the gas pedal it all went back to normal.

second red light, same issue at idle 700~rpm.. the second the car hits 1000+ rpm the problem goes away... few minutes before i reach work SES light came on.


i get to work and about an hour later i start the car and its back to normal, i had my HPtuner in the car with my laptop. so i ran a quick scan and it showed the following

[PCM] P0136 - HO2S Circuit Bank 1 Sensor 2 (Old) (Current) (Immature)
[PCM] P0137 - HO2S Circuit Low Voltage Bank 1 Sensor 2 (SES) (Old) (History) (Immature)
[HUD] B1004 - Keep Alive Memory (KAM) (History) (Immature)
[Entertainment] B1004 - Keep Alive Memory (KAM) (History) (Immature)
[Entertainment] U1255 - Class 2 Communication Malfunction (History) (Current) (Immature)


any idea?

Sounds like some wiring has come loose somewhere, your battery is on its way out, or your alternator is on its way out.

Have the battery and alt tested, its free besides your time to pull them out.

Sounds like the battery/connection to me too. Is it the original?

Sounds like a Battery/Alternator to me

i was thinking more like the alternator too... but why would it be fine now?

but and whats with all the codes? :/

My van does the same thing stop at a light and everything dims and fan slows take off and back to normal. On my van its the alternator thats bad; so i going to say probably alternator.

The alt is driven by the motor, so when your stopped its turning slower, if the battery cant supply the demand for power while the alt isn't putting out full power then everything will dim. I still think both should be tested.

I know on mine the battery is new. But i agree it is always good to test both.

might sound like a stupid question but how do tou test it?


John to be honest with you i wouldnt know.. the car is used.. so it could be original but cant confirm