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Emissions Replacing bypass solenoid on a 01 civic on emission system

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  • I work on civic's at home. Tell what kind valve you are replacing, if you a engine code please let know.

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  • Cars & Trucks Master
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I know of no part called a bypass valve.

Posted on May 09, 2013


6 Suggested Answers

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Posted on Jan 02, 2017

  • 102 Answers

SOURCE: emission system

you have a code in the emission system comp telling you you have a fault, you will need to have the codes read by volvo

Posted on Oct 21, 2008

emissionwiz
  • 75051 Answers

SOURCE: 01 sonata gls v6...code po455, po442. what are

If you have an EVAP leak, you will get the following codes:

1. P0442 evap emission control system leak (small).
2. P0455 evap emission control system leak (large).

If these codes come up, you need to trace the leak. The most common place for the systems to leak besides the gas cap is at the service port under the hood, the hoses at the purge solenoid, and the hoses around the fuel tank. Check all your EVAP hoses from under the hood , all the way back to the gas tank. You can repair a split hose easily. Buy some 14.5mm EVAP hose at the auto parts store. Just cut the split or cracked section out and attach the new hose.

I can only say that u must fix the code issue and light to pass state emission test, if u reset the light they will know, the system will tell the tester that the system is not ready, this will cause a fail.

Posted on Mar 16, 2009

daves944
  • 1050 Answers

SOURCE: vehicle failed emissions testing

You need to replace the intake upper plenum gaskets. There is two pieces, a top cover with one big silicone o-ring gasket and a lower half with six smaller silicone o-rings for the individual intake ports. You can buy these as a set, just for this job. Start this job by removing the wiper blades, then release all the screws, (including the ones that support the wiper motor), that hold that big black plastic valence at the back of the engine compartment. Pull that out of the way, you will have to pull the windshield washer hose through it, just disconnect it on the engine side, now you have access to the plenum. It's a pretty easy job now to remove and replace both halves, just a bunch of 8mm screws hold it all together. Take notes or digital pics along the way so you can pop it all back together. My only caution would be; when you have it apart, do not drop anything in the intake port! I always stuff kleenex in these while I'm working in case something slips out of my hands. Also, don't over tighten, it's all plastic. If you don't want to do it yourself, a shop should charge about an hour and a half, plus the codes must be reset and the van driven until all the monitors are ready.

Posted on Mar 26, 2009

  • 1 Answer

SOURCE: PO 449 Evaporotive Emissions Vent Valve Solenoid

FUEL VENT VALVE FOR 2001 CHEV TRUCK

Posted on Mar 28, 2009

  • 1201 Answers

SOURCE: Emissions Indicator came on! OH NO!!

It could be any sensor or leak anywhere in the emission system.
The best thing to do is to have a code scanner hooked up to the car to pin point the actual problem. If there ia an autozone or advanced auto near you go there, and tell them you need a code retrieved, if not call different auto part stores to find out if they do that. Takes about 30 seconds to get the code.

Posted on Apr 27, 2009

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2006 jetta 2.5 liter


causes could be - Faulty Vacuum hoses damaged
- Faulty Air Pump inoperative
- Air bypass solenoid harness is open or shorted
- Air bypass solenoid circuit poor electrical connection
- Air bypass solenoid leaking/blocked or stuck open/closed
- Air diverter valve leaking/blocked or stuck open/closed

An air pump is used on the vehicle to lower tail pipe emissions on start-up. The Powertrain Control Module (PCM) grounds the Air pump relay control circuit which energizes the Air pump. The PCM also grounds the Air combination valve vacuum control solenoid circuit, which energizes the Air vacuum control solenoid. Vacuum is then applied to both Air combination valve diaphragms which opens the shut off valves. The PCM enables both circuits simultaneously when Air system operations id desired. When the AIR system is active, then Air pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR combination valves replace the conventional check valves. When the AIR system is inactive the shut off valves prevent air flow in either direction.

Apr 08, 2014 | 2006 Volkswagen Jetta

1 Answer

Coad P1547


Are you sure that is the correct code? Maybe P1457?? If so, it's an evaporative emissions system leak. The most common failures for evap on this model are the purge control solenoid, and missing/loose/aftermarket gas caps. The evap system needs to be tested. That's not something I can do over the net. Sorry.

Mar 17, 2014 | 2005 Honda Civic

1 Answer

I have a 2001 Honda Civic that did not pass emissions test. My


A. DTC P1705: Short in Transmission Range Switch (TRS) Circuit. The TRS lights the A/T gear position indicator in the instrument panel shows which gear has been selected.

The PCM also uses this information in order to manage the fuel system for maximum efficiency. The most obvious symptom you will see is the A/T gear position indicator lights will not come on or come on in the wrong position.

Once this is repaired emissions should pass

Aug 24, 2012 | 2001 Honda Civic

2 Answers

Code p0410b secondary air injection system? what does it meen? what is the cause?


The secondary air injection system is an electric low pressure air pump that blows air into the exhaust stream to help burn up Hydrocarbons (HC), it only operates under certain conditions such as a cold engine. The common cause of failure is that the electric pump motor fails. The pump is sold as one complete assembly and is located under the hood of the car in the engine bay. The part is about $300 and is dealer only. Below are all the possible causes of the OBD2 fault code P0410 Possible causes - Vacuum hoses damaged.
- Air Pump inoperative. (most common cause)
- Air bypass solenoid circuit open.
- Air bypass solenoid leaking/blocked or stuck open/closed.
- Air diverter valve leaking/blocked or stuck open/closed.
Other possible causes and solutions to the code. - Visually inspect vacuum lines for disconnects in the AIR systems and visually inspect for proper vacuum line routing. Repair if necessary.
- Disconnect the air pump hose at the solenoid valve, start the engine and see if there is air being pumped

Feb 18, 2011 | 2005 Isuzu Ascender

1 Answer

Po 442 po 455


P0442 - Evaporative Emissions System Leak Detected (Small Leak)

P0455 - Evaporative Emissions System Leak Detected (Gross Leak)

This diagnosis detects leaks in the EVAP purge line using engine intake manifold vacuum. If pressure does not increase, the ECM will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid valve under the following vacuum test condition. The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.

Causes:
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve
- Leak is in line between intake manifold

Solutions:
- Re-tighten or replace fuel tank filler cap
- Replace damaged or leaking EVAP canister
- Replace damaged or leaking lines.

Feb 10, 2011 | Chrysler Town and Country Cars & Trucks

1 Answer

1997 Honda Civic emission control system problem?


Yes the problem is effecting the emissions controls. Sounds like the timing if off. Take the vehicle to you local Auto Parts Store and most will scan the ECU for fault codes. This code will help you to figure out the problem.

Aug 03, 2009 | 1997 Honda Civic

2 Answers

My 97 honda civic dx check engine light keeps coming on


Had this issue did you replace the exhaust

Jun 19, 2009 | 1997 Honda Civic

1 Answer

Emissions Indicator came on! OH NO!!


It could be any sensor or leak anywhere in the emission system.
The best thing to do is to have a code scanner hooked up to the car to pin point the actual problem. If there ia an autozone or advanced auto near you go there, and tell them you need a code retrieved, if not call different auto part stores to find out if they do that. Takes about 30 seconds to get the code.

Apr 27, 2009 | 2004 Honda Civic

2 Answers

I have a honda civic 1993 lsi with high CO emissions level reading at 2.70% and lambda levels are low.please can you give me any advice on correcting these levels for it to pass its MOT. Thanks


It is running rich. Verify the readings are within specs from the O2 sensors, they should fluctuate up and down once the car is hot, constant high reading is rich run, very low is lean or defective sensors, also clean the throttle body and air-bypass valve, changing the oil can help as well. Do you have any OBD 1 Codes in the system memory?

Oct 29, 2008 | Honda Civic Cars & Trucks

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