Engine-Codes - Honda - P1456 1998 Honda Civic

P1456 1998 Honda Civic Code - Evaporative Emissions Control System Leakage Fuel Tank

- Code Popularity: 12,902 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1456 1998 Honda Civic?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Missing Fuel Filler Cap
  • Incorrect Fuel Filler Cap used
  • Fuel Filler Cap remains open or fails to close
  • Foreign matter caught in the Fuel Filler Cap
  • Faulty EVAP Two-Way Valve
  • Faulty EVAP Bypass Solenoid Valve
  • Faulty EVAP Canister

Code Tech Notes

Usually, a loose or bad fuel tank filler cap will trigger this code. Retighten the fuel tank filler cap and erase the code to repair the problem.

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How to Fix the DTC P1456 1998 Honda Civic?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1456 1998 Honda Civic code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • A noticeable fuel odor may result from fuel vapor release

What Does the P1456 1998 Honda Civic Code Mean?

The evaporative emission (EVAP) control system stores fuel vapor from the fuel tank in the EVAP canister temporarily to prevent it from escaping to the atmosphere and to enable it to be drawn into the engine by intake manifold vacuum and burned. In addition, the onboard refueling vapor recovery system (ORVR) stores fuel vapor generated when refueling in the EVAP canister.
The EVAP control system leak detection method improves the accuracy and frequency of the detection by determining faulty components and vapor leakage for each part. The EVAP control system (from the purge valve to the fuel tank) is divided into two parts. One is the "EVAP Canister Side" (from the EVAP two-way valve to the purge valve) and the other is the "Tank Side" (from the EVAP two-way valve to the fuel tank). There is 0.04-inch leak detection and 0.02-inch leak detection. If the 0.04 inch leak detection results are OK, the 0.02-inch leak detection runs. The P1456 code is detected when the EVAP system has a very small leak.
P1456 1998 Honda Civic Code - Evaporative Emissions Control System Leakage Fuel Tank

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