P0129 Mitsubishi Code - Barometric Pressure Out Of Range Low
Quick Answer
The P0129 diagnostic trouble code (DTC) in a Mitsubishi indicates that the barometric pressure sensor is reading a value that is lower than the expected range. Common causes include Faulty barometric pressure sensor, Vacuum leak in the intake system, Clogged air filter. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0129 Mitsubishi indicates Barometric Pressure Out Of Range Low.
- Common causes
- Common causes include Faulty barometric pressure sensor, Vacuum leak in the intake system, Clogged air filter.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0129 Mitsubishi Description
The P0129 diagnostic trouble code (DTC) in a Mitsubishi indicates that the barometric pressure sensor is reading a value that is lower than the expected range. The barometric pressure sensor is a crucial component in the vehicle's engine management system, as it helps the engine control module (ECM) determine the correct air-fuel mixture for optimal performance and emissions control. When the barometric pressure sensor detects a value that is out of range low, it can lead to various issues with the vehicle's performance and efficiency.
Common Causes of P0129 Mitsubishi
- Faulty barometric pressure sensor
- Vacuum leak in the intake system
- Clogged air filter
- Issues with the engine control module (ECM)
- Wiring or connection issues with the barometric pressure sensor
Symptoms of P0129 Mitsubishi
- Rough idling
- Poor acceleration
- Decreased fuel efficiency
- Stalling
- Check engine light illuminated
How to Fix P0129 Mitsubishi
- Begin by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the specific DTC and confirm that it is indeed P0129.
- Inspect the barometric pressure sensor and its wiring for any visible damage or corrosion. Replace the sensor if necessary.
- Check for any vacuum leaks in the intake system by performing a smoke test or using a vacuum gauge. Repair any leaks found.
- Inspect and replace the air filter if it is clogged or dirty, as this can affect the sensor's readings.
- Clear the DTC using the diagnostic scanner and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P0129 Mitsubishi
The typical repair costs for addressing a P0129 code in a Mitsubishi can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It is important to note that diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops may offer lower rates. It is advisable to obtain quotes from multiple shops to determine the most cost-effective option for the repair.
Need more information about the P0129 Mitsubishi code?
Need more information on how to fix the P0129 Mitsubishi code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0129 Mitsubishi code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0129 Mitsubishi Code
1. What does the OBDII code P0129 mean on a Mitsubishi?
P0129 indicates that the vehicle’s Powertrain Control Module (PCM) has detected that the barometric pressure is lower than the expected range.
2. What are the common symptoms of code P0129 in a Mitsubishi?
Common symptoms include poor engine performance, reduced fuel efficiency, difficulty starting the engine, and potential stalling during operation.
3. What causes the P0129 code to appear in a Mitsubishi?
Possible causes include a faulty barometric pressure sensor, wiring or connection issues, a malfunctioning MAP sensor, or a problem with the vehicle’s PCM.
4. Can a clogged air filter cause the P0129 code?
While unlikely, a severely clogged air filter might restrict airflow and contribute to performance issues, but the code is typically related to the barometric pressure sensor or its circuit.
5. How can I diagnose the P0129 code on my Mitsubishi?
Start by inspecting the barometric pressure sensor and its wiring for damage or corrosion. Compare live data from the barometric pressure sensor with atmospheric pressure using a scan tool.
6. Is it safe to drive a Mitsubishi with the P0129 code?
Driving with this code is not recommended, as it can lead to poor performance, inefficient fuel use, and potential engine stalling, which may compromise safety.
7. How do you fix the P0129 code on a Mitsubishi?
Repairs may include replacing the barometric pressure sensor, repairing damaged wiring, cleaning or replacing the MAP sensor, or reprogramming the PCM if necessary.
8. Does the P0129 code require sensor replacement?
Not always. Before replacing the sensor, check for wiring issues, poor connections, or other related faults that may trigger the code.
9. Can extreme weather conditions cause the P0129 code?
Yes, extreme altitude or weather changes can temporarily affect the barometric pressure reading, but persistent issues likely point to sensor or circuit problems.
10. Will clearing the P0129 code with a scan tool fix the problem?
Clearing the code may temporarily remove the warning light, but it will return if the underlying issue isn’t resolved. Proper diagnostics and repairs are needed.
Discuss the causes and fixes for P0129 Mitsubishi OBDII Code
Code P0129 Mitsubishi comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.