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 is getting a confusing message about how fast the engine should be running when the car is not moving.
The Engine Control Module (ECM) is receiving an implausible signal regarding the desired idle speed from the Controller Area Network (CAN).
The P1807 code indicates that the ECM is detecting an implausible or unexpected signal from the CAN bus related to the desired idle speed of the engine. This could be due to a communication issue, a sensor fault, or a problem with the ECM itself.
• Erratic idle speed
• Engine stalling
• Check Engine Light illuminated
• Faulty idle speed control valve
• Wiring issues in the CAN bus
• Faulty ECM or software glitch
ECM: Engine Control Module
CAN: Controller Area Network
Idle Speed Control Valve: A component that regulates the engine's idle speed.
• Check for other codes that might indicate CAN bus issues.
• Inspect wiring and connectors related to the idle speed control circuit.
• Test the idle speed control valve for proper operation.
• Repair or replace faulty wiring or connectors.
• Replace the idle speed control valve if defective.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• CAN bus diagnostic tool
$150 - $500
Moderate
• Ford Focus
• Volkswagen Passat
• Toyota Camry
• Regularly inspect and maintain the vehicle's wiring.
• Ensure ECM software is up to date.
• Perform routine diagnostic checks.
Engine Performance
• Avoid driving the vehicle if it stalls frequently.
• Consult a professional mechanic for diagnosis and repair.
Check with your vehicle manufacturer for warranty coverage on ECM and related components.
This code has been associated with communication issues in vehicles with complex electronic systems.
Moderate – The vehicle may experience drivability issues, but it is not an immediate safety concern.
Driving with this code may cause the vehicle to stall unexpectedly, which could be hazardous.
• Engine at operating temperature
• Vehicle in idle state
The idle speed control valve is typically located on or near the throttle body.
Q: Can I drive with a P1807 code?
A: It's not recommended as it may lead to stalling and drivability issues.
Q: Will the Check Engine Light turn off by itself?
A: The light may turn off if the issue is resolved, but it's best to clear the code with an OBD-II scanner.
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