Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks the timer that tracks how long the engine is off is counting too quickly while the engine is actually running.
The P15FA code is triggered when the engine control module (ECM) detects that the external engine off timer is incrementing faster than expected while the engine is running.
The ECM monitors various timers to ensure proper engine operation. The external engine off timer is supposed to track the time the engine is off. If the ECM detects that this timer is incrementing too quickly while the engine is running, it sets the P15FA code. This could be due to a software glitch, a faulty sensor, or an issue with the ECM itself.
• Check Engine Light is on
• Possible engine performance issues
• Unusual engine behavior
• Faulty ECM
• Software glitch
• Faulty timer sensor
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Scan the vehicle for codes and freeze frame data.
• Check for any software updates for the ECM.
• Inspect the wiring and connections to the ECM.
• Update the ECM software if necessary.
• Repair or replace faulty wiring or connections.
• Replace the ECM if it is determined to be faulty.
• OBD-II scanner
• Multimeter
• ECM programming tool
$200 - $800
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regular ECM software updates
• Routine vehicle maintenance
• Inspect wiring regularly
Engine Performance
• Have your vehicle checked by a professional if the Check Engine Light comes on.
• Keep your vehicle's software up to date.
Check with your vehicle manufacturer for warranty coverage related to ECM issues.
This code has been reported in vehicles with ECM software issues or faulty sensors.
Moderate – It is recommended to address this issue to prevent potential engine performance problems.
Operating a vehicle with engine issues can lead to further damage or safety hazards. Always address Check Engine Light warnings promptly.
• Engine running
• Vehicle in park or neutral
The ECM is typically located in the engine compartment or under the dashboard.
Q: Can I drive with a P15FA code?
A: It's possible to drive, but it's recommended to have it checked to avoid potential engine issues.
Q: How do I reset the Check Engine Light?
A: You can reset it with an OBD-II scanner, but it's important to fix the underlying issue first.
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