Close
P-1457 what is this code
1999 Acura TL

P-1457 what is this code

(1999 Acura TL)
code unknown
1 answer & 0 comments
Popular Answer
on March 12, 2011
Found this online:

Check Engine - Code P1457

--------------------------------------------------------------------------------

I recently rid my '99 TL of this DTR (Diagnostic Trouble Code) P1457.


The description in the manual is "Leak detected in EVAP Control System". These are the components that keep gas fumes from the tank from polluting our atmosphere.

Looking at all the components in the system (most are under the car just inboard of the left rear wheel) I didn't see any obvious leaks...lots of rubber hoses and stuff, but everything was tight and connected.

I then found TSB 03 - 001 which described this code as a result of corrosion in the EVAP bypass solenoid valve. Fair enough, NJ likes to salt the roads in winter to prevent pesky lawsuits. So I installed a new one. The code came back.

Then spent some $$ having the dealer troubleshoot the problem. (The manual has the technician exercise the various solenoids in the system while checking to see if the system holds vacuum.) First they said "there's nothing wrong" but when I asked if they did all the tests, they admitted they didn't, and checked better...they told me there were leaks at the two way valve and the canister vent shut valve. Huh.

It was a crapshoot but I first replaced the two way valve. Gotta be it, I thought, cause the old one has gas in it and the internal diaphragm must be shot.

The code came back.

Then I replaced the EVAP control canister shut valve. Like the bypass valve of the TSB, this one is down there in the salt, open to road-water splash and dirt.

That seems to have done the trick! No code now, for two weeks!

So even with the dealer's diagnostic time and the wasted replacement parts, I think I came out ahead...as my cost was half of the dealer's estimate to actually fix the problem.

Sign in to reply
General Diagnosis
$88 - $111 Learn More
on March 12, 2011
Found this online:

Check Engine - Code P1457

--------------------------------------------------------------------------------

I recently rid my '99 TL of this DTR (Diagnostic Trouble Code) P1457.


The description in the manual is "Leak detected in EVAP Control System". These are the components that keep gas fumes from the tank from polluting our atmosphere.

Looking at all the components in the system (most are under the car just inboard of the left rear wheel) I didn't see any obvious leaks...lots of rubber hoses and stuff, but everything was tight and connected.

I then found TSB 03 - 001 which described this code as a result of corrosion in the EVAP bypass solenoid valve. Fair enough, NJ likes to salt the roads in winter to prevent pesky lawsuits. So I installed a new one. The code came back.

Then spent some $$ having the dealer troubleshoot the problem. (The manual has the technician exercise the various solenoids in the system while checking to see if the system holds vacuum.) First they said "there's nothing wrong" but when I asked if they did all the tests, they admitted they didn't, and checked better...they told me there were leaks at the two way valve and the canister vent shut valve. Huh.

It was a crapshoot but I first replaced the two way valve. Gotta be it, I thought, cause the old one has gas in it and the internal diaphragm must be shot.

The code came back.

Then I replaced the EVAP control canister shut valve. Like the bypass valve of the TSB, this one is down there in the salt, open to road-water splash and dirt.

That seems to have done the trick! No code now, for two weeks!

So even with the dealer's diagnostic time and the wasted replacement parts, I think I came out ahead...as my cost was half of the dealer's estimate to actually fix the problem.

Sign in to reply

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.