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Discussion summary
YOUR RESEARCHCan't get a CA SMOG due to p0452 CEL evap code!
Reported repair
Install bosch fuel pressure sensor (under the battery) and it
Reported resolution
1
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Reported fix · Original poster
Update: Installed a new Bosch fuel pressure sensor (under the battery) and it solved my problem!
Leading evidence: 'Install bosch fuel pressure sensor (under the battery) and it' (1 discussions report resolution; 0 report an unsuccessful attempt). Across 1 matching discussions, The most frequently discussed action is 'Install bosch fuel pressure sensor (under the battery) and it' (1 discussions). For that action, 1 discussions report a resolution and 0 report an unsuccessful attempt. The most frequently reported fix is 'Install bosch fuel pressure sensor (under the battery) and it', supported by resolution reports in 1 discussions. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed · Original poster
I've already replaced the gas cap because the old seal was crackly.
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Suggestion
If the sensor doesnt work your next step may be to smoke test the system for a leak.
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5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261027T020439Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I'm unable to pass a SMOG because of this generic p0452 CEL. Google says the P0452 is a Evaporative Emission Control System Pressure Sensor Low Input.
From some initial research, it seems a fix could be simply replacing the
Fuel Pressure Sensor
but I am not seeing any info online on this generic code. I'd hate to order something that isn't going to solve my issue but I am planning to place an order on FCP Euro tomorow for my 02 BMW 540i so I may just throw this $118 sensor into the cart. I've already replaced the gas cap because the old seal was crackly.
Symptoms:
1. Basically no symptoms. However, prior to this CEL coming up, I've had fuel gauge issues in the past where the needle doesn't work unless the car is being refueled with adequate amounts of fuel (half to fuel tank worth). But this issue had occurred many years prior to this CEL coming up so I'm unsure if they're related.
Here are some other threads I've found during my research into diagnosing this issue:
1.
Check Your Fuel Pump/Sender Wiring! Repair guide inside.
2.
P0452 Evap System CEL
3.
Fuel pressure sensor replacement guide with pics
If anyone has other useful links, please share and thank you!
Lastly, here's a quick snap of the car
Its a generic code for the evap. If the sensor doesnt work your next step may be to smoke test the system for a leak. I could me a seal, hose or even a cracked charcoal canister.
I used to get a CEL for some kind of evap leak now and then in my 2k 996, then after putting in all new oxygen sensors (for another reason) the CEL never came back...so weird
This is a source reference. Confirm exact model applicability in the original material.
