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 hasn't been told that it's okay to start the engine. It's like when you have a toy with a remote control, but the remote hasn't been paired with the toy yet, so it won't work.
The EWS system in the vehicle is responsible for ensuring that only authorized keys can start the engine. This code indicates that the start value, which is a necessary part of this security system, has not been programmed.
The EWS (Electronic Immobilizer) is a security feature that prevents unauthorized starting of the engine. The start value is a specific code or value that must be programmed into the vehicle's computer to allow the engine to start. If this value is not programmed, the engine will not start, and the P1667 code will be triggered.
• Engine does not start
• Security light illuminated on dashboard
• No response when turning the ignition key
• New or replaced EWS module not programmed
• Faulty EWS module
• Communication issue between EWS and ECU
EWS: Electronic Immobilizer System
ECU: Engine Control Unit
• Verify the presence of the P1667 code using an OBD-II scanner.
• Check the EWS module for proper installation and connections.
• Attempt to program the start value using appropriate diagnostic tools.
• Program the start value into the EWS module using a diagnostic tool.
• Replace the EWS module if it is found to be faulty.
• Ensure proper communication between the EWS and ECU.
• OBD-II scanner
• Diagnostic programming tool
• Multimeter
$150 - $500
Moderate
• BMW 3 Series
• BMW 5 Series
• BMW X5
• Regularly check and maintain vehicle's electrical connections.
• Ensure any new modules are properly programmed.
• Avoid unauthorized modifications to the vehicle's security system.
Security System Issue
• Consult a professional mechanic if the engine won't start.
• Avoid attempting to bypass the immobilizer system.
Check with the vehicle manufacturer for warranty coverage on security system components.
This code is commonly associated with BMW vehicles due to their advanced security systems.
High – The vehicle will not start until this issue is resolved.
Ensure that all repairs are performed by a qualified technician to maintain vehicle security and safety.
• Vehicle in ignition on position
• Diagnostic tool connected
The EWS module is typically located near the steering column or under the dashboard.
Q: Can I drive my car with this code?
A: No, the vehicle will not start until the issue is resolved.
Q: Is this a common issue?
A: It is relatively common in vehicles with advanced security systems, especially after module replacement.
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Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.