Error code P1505

Hi,

The idea that the idle has been affected leads me to believe there is a vacuum leak. It may not be at the PCV. Take a look through the following and inspect the areas suggested under possible causes.

2002 Honda Civic DX Sedan L4-1668cc 1.7L SOHC MFI
P1505
Vehicle ALL Diagnostic Trouble Codes ( DTC ) Testing and Inspection P Code Charts P1505
P1505
DTC P1505: PCV Air Leakage

1. Reset the ECM/PCM.
2. Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on.
3. Let the engine at idle for at least 40 seconds with the throttle fully closed.
4. Check for DTC P1505 with the scan tool.

Is DTC P1505 indicated?

YES - Check these parts for vacuum leaks.
- PCV valve
- PCV hose
- EVAP canister purge valve
- Throttle body
- Brake booster hose

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Let me know what you find or if you have other questions.

Take care,
Joe

Hello, I'm Danny.

The green cap is the service port for the evaporative system. It will not introduce any air into the system. I'm more concerned with the code P0325 knock sensor issue. That would also cause your car to run terribly and shake. Here is a tutorial showing how to test electrical wiring:

https://www.2carpros.com/articles/how-to-check-wiring

I've attached picture steps below on how to diagnose code P0325. Let us know what you find and we'll go from there. Hope this helps and thanks again for using 2CarPros.

Hi,

If the PCV is good and all the mentioned things we discusses, the lights are off, and no leaks have been found, Based on the mileage, you may have low compression on all or one cylinder.

First, take a look through this link:

https://www.2carpros.com/articles/symptoms-of-low-compression

Here is a link that shows in general how compression is tested.

https://www.2carpros.com/articles/how-to-test-engine-compression

Here are the directions specific to your vehicle:

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2002 Honda Civic DX Sedan L4-1668cc 1.7L SOHC MFI
Component Tests and General Diagnostics
Vehicle Powertrain Management Tune-up and Engine Performance Checks Compression Check Testing and Inspection Component Tests and General Diagnostics
COMPONENT TESTS AND GENERAL DIAGNOSTICS
Engine Compression Inspection
1. Warm up the engine to normal operating temperature (cooling fan comes on).
2. Turn the ignition switch OFF.
3. Remove the air cleaner housing.
4. Disconnect all four injector connectors.
5. Remove the four ignition coils.
6. Remove the four spark plugs.

pic 1

7. Attach the compression gauge to the spark plug hole.
8. Connect a tachometer.
9. Open the throttle fully, then crank the engine with the starter motor and measure the compression.
Compression Pressure:
Above 930 kPa (9.5 kgf/cm2, 135 psi)
10. Measure the compression on the remaining cylinders.
Maximum variation:
Within 200 kPa (2.0 kgf/cm2, 28 psi)
11. If the compression is not within specifications, check the following items, then re-measure the compression.
Damaged or worn valves and seats
Damaged cylinder head gasket
Damaged or worn piston rings
Damaged or worn piston and cylinder bore

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Check this and let us know what you find.

Take care,
Joe

The PCV, when inspected, was there a clicking sound in it if you shake it? I have to say it has to do with a vacuum related issue. Back to the PCV, have you tried replacing it? And are you certain there are no cracks or damage to the hose?

Joe

Hello again.

Just curious to see if you've inspected the PCV valve and hose and the evap canister purge valve for any cracks or leaks. Let us know what you've found or if you have any further questions on this issue. Thanks again for using 2CarPros.

Danny-

Good morning,

I have read all the responses and I am wondering if you replaced the PCV valve. It sounds like it is stuck open and causing a massive vacuum leak.

https://www.2carpros.com/articles/how-emission-control-systems-work

https://www.2carpros.com/articles/evap-system-code-repair

Roy

Can you give me the long term trim reading off a scan tool in percentage?

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

That reading will tell me a lot about whether it has a vacuum leak.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Roy

Hello again.

Have you sprayed brake cleaner, cold start or ether around the intake manifold area to check for a leak there? Have you noticed any type of leak in that area? Thanks again for using 2CarPros.

Danny-