Diagnosing DTC P1457? Use TID Info To Pinpoint Problem (ASN0406-01)

Publication date: 2006-04-01
Reference number: ASN0406-01

DIAGNOSING DTC P1457? USE TID INFO TO PINPOINT PROBLEM

ACURA SERVICE NEWS

Reference Number(s): ASN0406-01, Date of Issue: April 1, 2006

ACURA:	All Models
CATEGORY:	Acura Service News
APPLIES TO:	All Models

SERVICE INFORMATION

NOTE: This article applies to '97-03 CLs, '98-01 Integras, '01-02 MDXs, '02-03 RSXs, '96-04 3.2RLs, and '97-03 3.2TLs. Newer model Acuras ('03-06 MDXs, '05-06 RLs, '04-06 RSXs, '04-06 TLs, and '04-06 TSXs) no longer use DTC P1456 or P1457. For details on this, see "SEVEN NEW DTCS REPLACE DTCS P1456 AND P1457 " in the January '06 issue of ServiceNews .

Troubleshooting DTC P1457 [EVAP system leakage (EVAP canister system)] and need to narrow it down to a specific problem? The OBD self-test info pulled from the ECM/PCM can help make short work of it (see S/B 02-005 , EVAP System Function Testing and Diagnostics With the PGM Tester ). It shows you which of the recently run OBD self-tests passed or failed.

NOTE: This S/B has you pulling test info with the PGM Tester, but doing it with the HDS is very similar. Until we can update this S/B to cover the HDS, just consider it useful guidance for now.

Here are the OBD self-tests related to DTC P1457 listed by their test ID (TID), along with an explanation of what could cause each test to fail:

TID$2D: This test fails because of a large leak, a solenoid that wont work, or a loose connection that keeps a solenoid from working.
TID$2E: This test fails because of a small leak. In most cases, it isnt because of an electrical problem but rather a component that wont hold vacuum during the test. Another reason is crossed hoses at the two-way valve.
TID$2F: This test fails because of a restriction in the EVAP canister vent. A canister vent shut valve thats stuck closed could be the reason, but a more likely reason is a yellow sac spiders nest in the three-way valve or drain joint. For details on this, see "GOT DTC P2422? CHECK FOR AN EVAP SYSTEM VENT BLOCKAGE " in the March 06 issue of ServiceNews .
TID$29: This test fails because the purge control solenoid valve is stuck open or a short to ground in the control wire is causing the system to purge when it shouldn't. On rare occasions, a restricted EVAP canister vent can cause this test to fail.
TID$3E: This test fails because of a very small leak. Like TID$2E, this test usually fails because of a component that won't hold vacuum and not because of an electrical problem.