P0155 DTC Code
P0155 DTC Code
Last weekend I installed an AFE intake, MAK downpipes with cats and a stainless works cat back exhaust. Truck is a 2015 ecoboost with 12k on the clock and has a Livernois tune for all the aftermarket parts including the downpipes.
Went to drive it today and the check engine light was on. Scanned the code and it's P0155 bank 2 sensor 1 o2 sensor heater circuit malfunction.
I cleared the code but haven't had a chance to drive the truck yet, any ideas on what could be throwing the code or what I should check first? I did a search and it appears this is the sensor in front of the cat on the driver's side is that correct?
Truck ran fine, I could definitely notice the power increase with the upgrades. Hopefully I can get this CEL fixed and any help is appreciated!
Went to drive it today and the check engine light was on. Scanned the code and it's P0155 bank 2 sensor 1 o2 sensor heater circuit malfunction.
I cleared the code but haven't had a chance to drive the truck yet, any ideas on what could be throwing the code or what I should check first? I did a search and it appears this is the sensor in front of the cat on the driver's side is that correct?
Truck ran fine, I could definitely notice the power increase with the upgrades. Hopefully I can get this CEL fixed and any help is appreciated!
Update: cleared the DTC and drove around for an hour, CEL came back on. Checked codes and it was the same one P0155. Checked bank 2 sensor 1 (driver side sensor in front of cat) and it was plugged in and tight, checked and tightened all hardware as well just to be safe.
Returned to stock tune but the same DTC comes back.
Is there a way to check the o2 sensor or can anything else be the cause?
Returned to stock tune but the same DTC comes back.
Is there a way to check the o2 sensor or can anything else be the cause?
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Update: cleared the DTC and drove around for an hour, CEL came back on. Checked codes and it was the same one P0155. Checked bank 2 sensor 1 (driver side sensor in front of cat) and it was plugged in and tight, checked and tightened all hardware as well just to be safe.
Returned to stock tune but the same DTC comes back.
Is there a way to check the o2 sensor or can anything else be the cause?
Returned to stock tune but the same DTC comes back.
Is there a way to check the o2 sensor or can anything else be the cause?
Just to follow up on this, the issue turned out to be the connector for the sensor wasn't fully seated in the harness connector which was tripping the p0155 DTC.
And a bit more info in case anyone else searches for this, the bank 2 sensor 1 location is the driver side in front of the cat. This sensor connects to the harness inside the engine bay, at the back of the engine closer to the driver side. The connector is a bit difficult to get to, it's a long reach which is why in my case it wasn't properly seated.
The best way to access the connector is to remove the engine shroud, to do this you remove the oil fill cap and lift up the front of the shroud itself, it is hinged at the back and simply pulls off. This gives you better access to the connector and you can see what you are actually doing which is always helpful.
And a bit more info in case anyone else searches for this, the bank 2 sensor 1 location is the driver side in front of the cat. This sensor connects to the harness inside the engine bay, at the back of the engine closer to the driver side. The connector is a bit difficult to get to, it's a long reach which is why in my case it wasn't properly seated.
The best way to access the connector is to remove the engine shroud, to do this you remove the oil fill cap and lift up the front of the shroud itself, it is hinged at the back and simply pulls off. This gives you better access to the connector and you can see what you are actually doing which is always helpful.
Last edited by Dave_NY; Feb 11, 2017 at 09:43 PM. Reason: Autocorrect can suck it