The P1106 code is a manufacturer-specific powertrain diagnostic trouble code. Its exact definition depends entirely on the vehicle application, relating to pressure sensor or solenoid monitoring circuits.
Because this code is manufacturer-specific, you must verify the exact factory definition for your vehicle. The code indicates a detected fault condition, but it does not automatically prove that any specific component has failed.
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Key Takeaways
- P1106 is a manufacturer-specific code, meaning its exact definition varies significantly by vehicle make and model.
- On Honda and Acura applications, it indicates a Barometric Pressure (BARO) sensor circuit range or performance problem.
- On GM applications, it refers to a Manifold Absolute Pressure (MAP) sensor circuit intermittent high voltage condition.
- On Chrysler, Dodge, and Jeep applications, it signals a BARO solenoid performance or vent valve solenoid circuit fault.
- Proper diagnosis requires confirming the exact factory definition before testing any components or circuits.
P1106 Code Description and Implications
P1106 is a manufacturer-specific powertrain code, meaning its exact definition depends entirely on the vehicle application. There is no single universal definition for this error code across all automotive brands.
Honda and Acura applications: The code indicates a Barometric Pressure (BARO) Sensor Circuit Range/Performance Problem. The engine control module detects the BARO sensor signal is outside the expected parameters for the current atmospheric conditions.
GM applications: The code refers to a Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage. The module detects erratic voltage spikes in the MAP sensor signal circuit, indicating a potential connection issue.
Chrysler, Dodge, and Jeep applications: The code indicates a BARO Solenoid Performance fault or a Barometric Pressure Read Vent Valve Solenoid Circuit Range/Performance issue, affecting pressure monitoring cycles.
Because the monitored system varies, this code can range from atmospheric pressure reading faults to intake manifold pressure or solenoid control issues. Always verify the exact factory definition for your specific vehicle before proceeding with diagnosis.
Common Causes of the P1106 Code
The causes of a P1106 code depend entirely on which system your vehicle’s manufacturer assigned this identifier to. Diagnostic testing is required to identify the root cause.
For BARO sensor applications (such as Honda or Acura): Possible causes include a failing barometric pressure sensor, damaged sensor wiring, poor electrical connections at the sensor connector, or an internal ECM fault.
For MAP sensor intermittent applications (such as GM): Potential causes involve a loose or corroded MAP sensor connector, chafed wiring causing intermittent shorts to voltage, or a failing MAP sensor element.
For BARO solenoid applications (such as Chrysler or Dodge): Causes may include a failing BARO solenoid, blocked or leaking vacuum hoses connected to the solenoid, or damaged control circuit wiring.
Symptoms Associated With P1106
Because P1106 applies to different systems across various manufacturers, the symptoms you experience will depend on the exact application. MIL behavior also varies; some vehicles may illuminate the Check Engine Light immediately, while others may require repeated monitor failures.
BARO sensor applications: You may notice decreased fuel efficiency, rough idling, or hesitation during acceleration as the engine computer struggles to calculate the correct fuel-air mixture for the current altitude and weather conditions.
MAP sensor intermittent applications: Symptoms can include engine stalling, severe hesitation, or the engine entering a reduced-power limp mode when the signal drops out.
BARO solenoid applications: You might experience poor engine performance or an illuminated Check Engine Light, though drivability symptoms may be minimal if the fault only affects specific monitoring cycles.
Diagnosing the P1106 Trouble Code
Diagnosis must begin by confirming the exact factory definition of P1106 for your specific make, model, year, and engine. Using the wrong diagnostic path will lead to incorrect testing.
For BARO sensor implementations: A scan tool capable of displaying live data is necessary. Monitor the BARO sensor reading and compare it to a known accurate barometric pressure reference. Inspect the sensor wiring and connectors for damage or corrosion.
For MAP sensor intermittent implementations: Inspect the MAP sensor connector for loose pins or corrosion. Perform a wiggle test on the wiring harness while monitoring the live MAP sensor voltage to identify intermittent opens or shorts.
For BARO solenoid implementations: Inspect the vacuum hoses connected to the solenoid for cracks or disconnections. Test the solenoid’s electrical resistance and verify the control signals from the module according to manufacturer service information.
Repairing the P1106 Issue
Repairs must follow confirmed diagnosis. Never replace components based solely on the presence of the code.
If testing confirms a failing BARO sensor on a Honda or Acura application, replace the sensor with a component meeting the correct vehicle specification and perform any required ECM relearn procedures.
If diagnosis confirms an intermittent wiring fault on a GM application, repair the damaged wiring or replace the corroded connector pigtail. If the wiring is intact but the sensor fails testing, replace the MAP sensor.
If the fault is isolated to the BARO solenoid on a Chrysler or Dodge application, replace the confirmed failed solenoid and ensure all associated vacuum lines are secure and leak-free.
Cost Considerations for P1106 Repairs
The cost to resolve a P1106 code varies because the underlying system differs by manufacturer. Exact pricing depends on diagnostic time, component accessibility, required parts, programming requirements, and labor.
For a BARO or MAP sensor replacement, parts and labor costs are generally moderate. If the root cause is a wiring harness repair, the cost will depend heavily on the labor time required to access and repair the damaged circuit. Always verify the exact cause before authorizing repairs.
Prevention Strategies for Future Occurrences
Preventing a P1106 code depends on the specific failure mechanism verified during diagnosis.
For pressure sensor applications, keeping the engine bay reasonably clean and ensuring connector seals remain intact may reduce the risk of moisture intrusion and terminal corrosion.
For solenoid and vacuum applications, inspecting visible vacuum hoses for dry rot or cracking during routine maintenance can help prevent leaks that trigger solenoid performance faults.
Troubleshooting Tips and Best Practices
Always verify the exact manufacturer definition before ordering parts. A P1106 code on a Honda requires entirely different diagnostic steps than the same code on a GM or Chrysler vehicle.
Do not assume a sensor has failed simply because it is named in the code description on a generic database. Wiring faults, poor grounds, and connector corrosion are known culprits in manufacturer-specific circuit codes.
For intermittent codes like the GM MAP sensor fault, clearing the code without performing a wiggle test on the harness may result in the code returning immediately once the monitor runs again.
If your vehicle is equipped with relevant technical service bulletins or software updates, check for their applicability to your exact model. Some sensor monitoring logic issues are addressed through manufacturer software recalibrations rather than hardware replacement.
More OBD-II Codes
| P1105 | P1104 | P1103 | P1108 |
| P1109 | P1107 | P1116 | P1117 |
| P1118 | P1119 | P1121 | P1122 |
| P1123 | P1124 | P1125 | P1126 |
| P1127 | P1128 | P1129 | P1130 |
| P1132 | P1133 | P1134 | P1135 |
Frequently Asked Questions
Is the P1106 code a generic OBD-II code?
No. P1106 is a manufacturer-specific code. Its exact definition and the monitored system depend entirely on your vehicle’s make, model, and engine configuration.
Will a P1106 code cause my vehicle to fail an emissions test?
If your vehicle uses this code for a pressure sensor or solenoid fault, it will likely cause an emissions test failure. The Check Engine Light illumination alone is grounds for automatic failure in testing regions.
Can a vacuum leak trigger a P1106 code?
Yes, on applications where P1106 monitors a BARO solenoid or MAP sensor. A vacuum leak or disconnected hose can cause erratic pressure readings or solenoid performance faults, triggering the code.
Does clearing the battery fix a P1106 code?
Disconnecting the battery may temporarily clear the code from the computer’s memory, but it does not repair the underlying electrical or mechanical fault. The code will return once the monitor runs again.
Can I drive my car with a P1106 code?
It depends on the application. If the code relates to an intermittent MAP sensor fault, the vehicle may stall or enter a reduced-power limp mode, making driving unsafe. It should be diagnosed promptly.
What Should You Do About the P1106 Code?
Confirm the exact factory definition for your specific vehicle, then follow the applicable manufacturer diagnostic procedure. Because P1106 is manufacturer-specific, the relevant system and components must be verified before any testing begins. Proper diagnosis ensures you address the actual root cause.
