2000 Acura 3.2TLFACTORY OEM SERVICE PROCEDURE

DTC P1457 EVAP Control System

  1. Disconnect vacuum hose from EVAP purge control solenoid valve "A". Connect vacuum pump to disconnected hose. Connect jumper wire between PCM 32-pin connector terminal No. 6 (Red/Yellow wire) and ground. Turn ignition on. Apply vacuum to hose. If valve holds vacuum, go to next step. If valve does not hold vacuum, EVAP purge control solenoid valve is okay. Go to step  4.
  2. Turn ignition off. Disconnect EVAP purge control solenoid valve 2-pin connector. Measure continuity between EVAP purge control solenoid valve 2-pin connector terminal No. 2 (Red/Yellow wire) and ground. If continuity is present, go to next step. If continuity is not present, repair open circuit in Red/Yellow wire.
  3. Turn ignition on. Measure voltage between EVAP purge control solenoid valve 2-pin connector terminal No. 1 (Black/Yellow wire) and ground. If battery voltage is present, replace EVAP purge control solenoid valve. If battery voltage is not present, repair open circuit in wiring between EVAP purge control solenoid valve and No. 6 (15-amp) PCM fuse.
  4. Disconnect vacuum hose from EVAP 2-way valve. Connect a vacuum pump to disconnected hose. Turn ignition on. Apply vacuum to hose. If valve does not hold vacuum, go to next step. If valve holds vacuum, EVAP by-pass solenoid valve/EVAP 2-way valve is okay. Go to step  7.
  5. Turn ignition off. Disconnect EVAP by-pass solenoid valve 2-pin connector. Measure continuity between EVAP by-pass solenoid valve 2-pin connector terminal No. 2 (Light Green/White wire) and ground. If continuity is present, go to next step. If continuity is not present, replace EVAP by-pass solenoid valve and "O" rings.
  6. Disconnect PCM 32-pin connector. Measure continuity between EVAP by-pass solenoid valve 2-pin connector terminal No. 2 (Light Green/White wire) and ground. If continuity is present, repair short circuit in wiring between EVAP by-pass solenoid valve and PCM. If continuity is not present, replace PCM.
  7. Disconnect vacuum hose from EVAP control canister vent filter. Connect vacuum pump to disconnected hose. Connect jumper wire between PCM 32-pin connector terminal No. 4 (Light Green/White wire) and ground. Turn ignition on. Apply vacuum. If valve does not hold vacuum, go to next step. If valve holds vacuum, EVAP canister vent shut valve is okay. Go to step  10.
  8. Turn ignition off. Disconnect EVAP control canister vent shut valve 2-pin connector. Measure continuity between EVAP control canister vent shut valve 2-pin connector terminal No. 2 (Light Green/White wire) and ground. If continuity is present, go to next step. If continuity is not present, repair open circuit in Light Green/White wire between EVAP control canister vent shut valve and PCM.
  9. Turn ignition on. Measure voltage between EVAP control canister vent shut valve 2-pin connector terminal No. 1 (Black/Yellow wire) and ground. If battery voltage is present, replace EVAP control canister vent shut valve. If battery voltage is not present, repair open circuit in Black/Yellow wire between EVAP control canister vent shut valve and No. 6 (15-amp) PCM fuse.
  10. Turn ignition off. Connect two 3-way "T" fittings into vacuum hose from EVAP control canister to EVAP 2-way valve. See Fig 1. Connect fuel tank pressure sensor to one "T" fitting, and vacuum pump to other "T" fitting. Remove vent hose from EVAP control canister vent shut valve "A". Cap port to seal fresh air vent for EVAP control canister. See Fig 2. Turn ignition on. Measure voltage between PCM 32-pin connector terminal No. 29 (Light Green wire) and PCM 31-pin connector terminal No. 18 (Green/Yellow wire) while slowly applying vacuum. Continue to pump vacuum until voltage drops to about 1.5 volts. Ensure engine coolant temperature is greater than 95°F (35C°) and vacuum pump has no leak. If voltage does not drop to 1.5 volts and hold for at least 20 seconds, go to next step. If voltage drops to 1.5 volts and holds for at least 20 seconds, check EVAP control canister vent shut valve line and connections. Repair as necessary.
    Fig 1: Connecting "T" Fittings At EVAP Control Canister
    G99D08413Courtesy of AMERICAN HONDA MOTOR CO., INC.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.