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 having trouble understanding how the air pressure sensor is working. It's like when you can't figure out how a new toy works.
The car's computer uses the barometric pressure sensor to understand the air pressure outside. This helps it adjust the engine settings. If it can't learn or recognize the sensor's signals, it triggers this code.
The P1173 code indicates that the Engine Control Module (ECM) has detected a failure in the learning process of the barometric pressure sensor variant recognition. This can affect how the engine adjusts to different altitudes and atmospheric conditions.
• Check Engine Light is on
• Poor engine performance
• Inconsistent fuel economy
• Faulty barometric pressure sensor
• Wiring issues or poor connections
• ECM software or hardware malfunction
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the barometric pressure sensor and its wiring.
• Check for ECM updates or reprogramming needs.
• Replace the barometric pressure sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or update the ECM if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$150 - $400
Moderate
• Honda Accord
• Toyota Camry
• Ford Focus
• Regularly inspect sensor connections.
• Keep ECM software updated.
• Avoid exposure to extreme conditions that can damage sensors.
Sensor Issue
• Have a professional diagnose the issue.
• Avoid driving in extreme conditions until fixed.
Check with your vehicle manufacturer for warranty coverage on sensors and ECM issues.
This code has been reported in vehicles with aging sensors or after ECM updates.
Moderate – It should be addressed soon to avoid performance issues.
Ignoring this code may lead to increased emissions and potential engine damage.
• Vehicle at operating temperature
• Stable atmospheric conditions
The barometric pressure sensor is typically located near the intake manifold or integrated into the ECM.
Q: Can I drive with a P1173 code?
A: It's possible, but not recommended as it can affect engine performance.
Q: How often should the barometric pressure sensor be checked?
A: It should be checked during regular vehicle maintenance or if performance issues arise.
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