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i’m not sure if this is the correct place to ask this question but i’ll do it anyway . i’m working on a 2014 police suv with dtcs p2195 p2197 p0300 . i know the definitions and possible causes for these codes but i’ve kinda hit a dead end .both 02 sensors are working ,haven’t found any vacuum leaks and fuel trims are crazy . anyone come across this yet ? rough idle ,clicking noise under hood , 3.5 l pain in my butt
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The p2195 and 2197 are for lean codes. which I’m sure triggered the p0300.
What are your fuel trims doing and the front o2 signal? Check for vacuum leaks
More in this link. If no vacuum leaks are found check fuel pressure.http://www.ericthecarguy.com/faq/solving-automotive-performance-issues
the long term fuel trims are around -5.0 and the short terms are 20+ positive . i used a smoke machine connected to the line from the brake booster and came up with no visible vacuum leaks . i figured out today that the purge valve on the intake is where the fast clicking noise is coming from .
[quote=”techjim” post=153368]the long term fuel trims are around -5.0 and the short terms are 20+ positive . i used a smoke machine connected to the line from the brake booster and came up with no visible vacuum leaks . i figured out today that the purge valve on the intake is where the fast clicking noise is coming from .[/quote]
The computer is wanting to subtract fuel -5 but short term is adding fuel. Topped out
at +20 which gave the lean code.I would look at fuel pressure. Have you tried carb spray
for vacuum leaks.it ended up being a malfunctioning purge valve on the intake . the vehicle was a 2011 ford police interceptor suv with a 3.5 l v6
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