I own a 1998 Honda Accord 4-cylinder and recently encountered the check engine light triggered by fault code P1457, which is a manufacturer-specific code. I'm looking for clear information on what this code means and how to resolve it. Has anyone experienced this issue or successfully fixed it? Any insights into potential causes or repair steps would be greatly appreciated. Thank you in advance for your help.
P1457 is a common fault in late-1990s Honda models and typically indicates a problem with one of the evaporative (EVAP) system solenoid valves—specifically, either the Vent Control Valve or the Two-Way Bypass Valve. These components are located beneath the vehicle, near the left rear seat area. They often fail due to corrosion or contamination from water seeping into the valve bodies. I replaced both valves, and while both were faulty, the two-way bypass valve appears to be the primary cause of failure. If anyone needs technical service bulletins (TSBs), part sources, or contact information for parts suppliers, please reach out. I can share detailed resources—just include your email address. Reference thread: http://forum.mpt.org/messages/9/6923.html?1115332443 Steve C.
I've been researching the P1457 code and found that the Haynes manual points to a leak in the EVAP control system near the canister. On my 1998 Honda Accord, I discovered a crimped vacuum line connected to the canister—this was easily fixed and cost-effective. A simple repair with proper tools can resolve this issue.
Steve C wrote: P1457 is commonly caused by failure in one of the EVAP system solenoid valves—the Vent Control Valve or Two-Way Bypass Valve—located under the vehicle, near the left rear seat. These valves corrode due to water ingress and often fail prematurely. I replaced both valves, with the two-way bypass valve being the most likely culprit. For TSBs, part sources, or technical details, I'm happy to share resources—just send your email address. Reference: http://forum.mpt.org/messages/9/6923.html?1115332443 I need this resolved before relocating from New York to Virginia. Please email me at newswriter001@aol.com. Thank you!
After installing an AEM intake system on my 1998 Honda Accord, the check engine light started appearing with code P1457. Any advice on how to eliminate this code and reset the system?
The check engine light only appeared after installing the intake—was it a partial intake (only a pipe into the throttle body) or a full intake manifold? Did you leave any vacuum lines disconnected? Is the valve mounted upside down, or are the hoses incorrectly connected, crimped, or unplugged? These details could help identify the root cause.
I'm currently dealing with a check engine light and fault code P1457. Is it possible to test the EVAP system components using a multimeter or other diagnostic tools to confirm if any valves are faulty?
I have a 1999 Honda Civic EX with repeated occurrences of P1457. Is this more likely due to the purge valve or the two-way bypass valve? Any guidance on which component is most frequently at fault?
I've tested both valves—either one could be faulty. It's recommended to test and replace both to ensure full system functionality.
With the P1457 code, I’ve noticed the engine struggles to start in cold or rainy weather. Leaving a light on under the hood overnight seems to resolve the issue. What component might need to be warmed up during these conditions? Could it be related to valve responsiveness in low temperatures?
I'm also experiencing the P1457 code on my 1998 Honda Accord. I suspect it's related to the oxygen sensor on the driver's side. If you find a solution, please share updates.