DTC P15C5

DTC P15C5  : Brake Booster Pressure Sensor A Characteristic Low Voltage

NOTE: 

• Troubleshoot any PGM-FI DTCs first - Refer to: How to Troubleshoot the Fuel and Emissions Systems .
• Before you troubleshoot, review the general troubleshooting information. - Refer to: How to Troubleshoot the Brake Booster Pressure Monitoring System

DTC (EVPS)

1. PGM-FI system DTC check

   - 1. Turn the vehicle to the ON mode.

   - 2. Check for Pending or Confirmed DTCs in the PGM-FI system with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame

   DTC (PGM-FI)

   Are any DTCs indicated?

   YES 

   Go to the indicated DTC's troubleshooting - Refer to: How to Troubleshoot the Fuel and Emissions Systems .

   NO 

   Go to step 2.

2. Brake booster pressure sensor check

   - 1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Substitute a known-good brake booster pressure sensor.

   - 3. Turn the vehicle to the ON mode.

   - 4. Clear the DTC with the HDS.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   P15C5 Brake Booster Pressure Sensor A Characteristic Low Voltage

   Is DTC P15C5 indicated?

   YES 

   Substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM. - Refer to: PCM Removal and Installation (19-21 9-Speed A/T), or PCM Removal and Installation (6-Speed A/T, 16-18 9-Speed A/T) .

   NO 

   Replace the original brake booster pressure sensor .