2013 Ecoboost Po430 code only when cold outside
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Tuned
Joined: Dec 2007
Posts: 311
Likes: 7
From: East TN
2013 Ecoboost Po430 code only when cold outside
Hi, im getting a P0430 code only when its below around 40 degrees, if the temperature gets over that most of the time the light will turn off itself and stay off until the next time the temp gets cold. I bought back in march and it did this for a few weeks but as the average temperatures went up the light never came back on all summer/fall. Only now that the temps are getting lower im having the same problem. I had planned on just getting a new cat and be done with it especially with my high milage but i feel like this is some kind of loose hose/intake leak or something that shows itself when cold contracts the joints somewhere? Has anyone ever had a similar problem and found any results ?
Also ive never had any other codes come up on the truck ever and no drivability issues
Also ive never had any other codes come up on the truck ever and no drivability issues
Lead Driver
Joined: Nov 2020
Posts: 7,128
Likes: 1,945
From: Sportsman's Paradise
Hi, im getting a P0430 code only when its below around 40 degrees, if the temperature gets over that most of the time the light will turn off itself and stay off until the next time the temp gets cold. I bought back in march and it did this for a few weeks but as the average temperatures went up the light never came back on all summer/fall. Only now that the temps are getting lower im having the same problem. I had planned on just getting a new cat and be done with it especially with my high milage but i feel like this is some kind of loose hose/intake leak or something that shows itself when cold contracts the joints somewhere? Has anyone ever had a similar problem and found any results ?
Also ive never had any other codes come up on the truck ever and no drivability issues
Also ive never had any other codes come up on the truck ever and no drivability issues
Description: This DTC sets when the bank 2 catalyst system efficiency is below the acceptable threshold.
Possible Causes:
- Use of leaded fuel
- Damaged heated oxygen sensor (HO2S)
- Out of range engine coolant temperature (ECT) sensor
- High fuel pressure.
- Damaged exhaust manifold
- Damaged catalytic converter
- Oil contamination
- Cylinder misfiring
- Downstream HO2S wires incorrectly connected
- Damaged exhaust system pipe
- Damaged muffler/tailpipe assembly
- Retarded spark timing
- Leaking fuel injector
Tuned
Joined: Dec 2012
Posts: 432
Likes: 112
Exhaust leaks could cause it. Cold temps could push it over the threshold. Cat codes are not set immediately, but rather over a few driving cycles (uses as special averaging formula).
The front o2 sensor is compared to the rear.
Front waveform should look like this
/\/\/\/\/\/\/\/\/\/\/\/\/\/
Rear Should look like this after the cat is done with the exhaust.
-------------------------
The computer computes a switch ratio for the two.
The more similar they are, the weaker the cat is getting. But there could be external factors that influence it. (E.G. A leak, bad rear 02, etc). Something could just push it over the edge for a light. That is why it is important to diagnose. Also running rich or lean could take out the next cat. Cats on a well running engine could last a lifetime (assuming they don't rot out).
The front o2 sensor is compared to the rear.
Front waveform should look like this
/\/\/\/\/\/\/\/\/\/\/\/\/\/
Rear Should look like this after the cat is done with the exhaust.
-------------------------
The computer computes a switch ratio for the two.
The more similar they are, the weaker the cat is getting. But there could be external factors that influence it. (E.G. A leak, bad rear 02, etc). Something could just push it over the edge for a light. That is why it is important to diagnose. Also running rich or lean could take out the next cat. Cats on a well running engine could last a lifetime (assuming they don't rot out).
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
Exhaust leaks could cause it. Cold temps could push it over the threshold. Cat codes are not set immediately, but rather over a few driving cycles (uses as special averaging formula).
The front o2 sensor is compared to the rear.
Front waveform should look like this
/\/\/\/\/\/\/\/\/\/\/\/\/\/
Rear Should look like this after the cat is done with the exhaust.
-------------------------
The computer computes a switch ratio for the two.
The more similar they are, the weaker the cat is getting. But there could be external factors that influence it. (E.G. A leak, bad rear 02, etc). Something could just push it over the edge for a light. That is why it is important to diagnose. Also running rich or lean could take out the next cat. Cats on a well running engine could last a lifetime (assuming they don't rot out).
The front o2 sensor is compared to the rear.
Front waveform should look like this
/\/\/\/\/\/\/\/\/\/\/\/\/\/
Rear Should look like this after the cat is done with the exhaust.
-------------------------
The computer computes a switch ratio for the two.
The more similar they are, the weaker the cat is getting. But there could be external factors that influence it. (E.G. A leak, bad rear 02, etc). Something could just push it over the edge for a light. That is why it is important to diagnose. Also running rich or lean could take out the next cat. Cats on a well running engine could last a lifetime (assuming they don't rot out).
That said, if the downstream sensors are being logged, a good cat would cause them to show very little switching activity. A cat that has declined in performance will show considerably more switching activity.
Tuned
Joined: Dec 2012
Posts: 432
Likes: 112
The F150 models moved away from the simple front/rear switching ratio method as of the 2009 MY when Ford moved the upstream sensors to the wideband (UEGO) variety. Downstreams are still switching sensors. The calculations regarding catalyst operation and efficiency are far more complex now. Review the OBDII documentation for details, they're available for free at www.motorcraftservice.com.
That said, if the downstream sensors are being logged, a good cat would cause them to show very little switching activity. A cat that has declined in performance will show considerably more switching activity.
That said, if the downstream sensors are being logged, a good cat would cause them to show very little switching activity. A cat that has declined in performance will show considerably more switching activity.
. Need to get with the times!
