P1900 Code - Output Shaft Speed Circuit Intermittent Malfunction
Quick Answer
The P1900 diagnostic trouble code (DTC) refers to an intermittent malfunction in the output shaft speed circuit of a vehicle. Common causes include Faulty output shaft speed sensor, Damaged wiring or connectors in the circuit, Issues with the TCM. 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
- P1900 indicates Output Shaft Speed Circuit Intermittent Malfunction.
- Common causes
- Common causes include Faulty output shaft speed sensor, Damaged wiring or connectors in the circuit, Issues with the TCM.
- 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.
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Code P1900 Description
The P1900 diagnostic trouble code (DTC) refers to an intermittent malfunction in the output shaft speed circuit of a vehicle. The output shaft speed sensor is a critical component of the transmission system, responsible for monitoring the rotational speed of the output shaft. This information is essential for the transmission control module (TCM) to determine shift points, torque converter lock-up, and other transmission functions. When the output shaft speed circuit experiences an intermittent malfunction, it can lead to erratic shifting patterns, decreased fuel efficiency, and potential drivability issues.
Common Causes of P1900
- Faulty output shaft speed sensor
- Damaged wiring or connectors in the circuit
- Issues with the TCM
- Malfunctioning transmission
- Corrosion or contamination in the sensor connections
Symptoms of P1900
- Erratic shifting patterns
- Slipping gears
- Delayed engagement when shifting
- Illumination of the Check Engine Light
- Reduced fuel efficiency
How to Fix P1900
- Diagnose the issue using a scan tool to retrieve the specific trouble code and related data.
- Inspect the output shaft speed sensor, wiring, and connectors for any signs of damage or corrosion.
- Test the output shaft speed sensor using a multimeter to ensure it is functioning correctly.
- Replace the faulty sensor or repair any damaged wiring/connectors as needed.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1900
The cost of repairing a P1900 code can vary depending on the specific cause of the issue and the labor rates in your area. Typically, replacing an output shaft speed sensor can range from $100 to $250, including parts and labor. Additional costs may apply if there are wiring or connector issues that need to be addressed. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your vehicle's make and model. Keep in mind that diagnostic time and labor rates can influence the overall cost of the repair.
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Code P1900 Information for Specific Makes
- P1900 Audi — Engine Coolant Blower Motor Speed 2 Open Circuit/Short To Ground
- P1900 Ford — Output Shaft Speed Circuit Intermittent Malfunction
- P1900 Infiniti — Radiator Cooling Fan Motor Control
- P1900 Lincoln — Output Shaft Speed Circuit Intermittent Malfunction
- P1900 Mazda — Turbine Shaft Speed Sensor Intermittent
- P1900 Mercury — Output Shaft Speed Circuit Intermittent Malfunction
- P1900 Nissan — Radiator Cooling Fan Motor Control
Frequently Asked Questions about P1900 Code
1. What are the common symptoms of OBDII code P1900?
- Common symptoms include erratic shifting, harsh shifting, transmission slipping, and the vehicle going into limp mode.
2. What are some possible causes of the Output Shaft Speed Circuit Intermittent Malfunction (P1900) code?
- Possible causes include a faulty output shaft speed sensor, damaged wiring or connectors in the circuit, a malfunctioning transmission control module (TCM), or internal transmission issues.
3. How can I diagnose the cause of the P1900 code?
- To diagnose the issue, you can use a scan tool to read the code and check for any related codes. Then, inspect the output shaft speed sensor and its wiring for damage, test the sensor's resistance, and check the TCM for proper operation.
4. Can I continue driving my vehicle with the P1900 code present?
- It is not recommended to drive the vehicle with the P1900 code present, as it can lead to further damage to the transmission and other components. It is best to address the issue promptly.
5. How can I repair the Output Shaft Speed Circuit Intermittent Malfunction (P1900) code?
- Repair methods may include replacing the output shaft speed sensor, repairing damaged wiring or connectors, resetting the TCM, or addressing any internal transmission problems. Consult a professional mechanic for accurate diagnosis and repair.
6. Will resetting the trouble codes make the P1900 code disappear permanently?
- Resetting the trouble codes may temporarily clear the P1900 code, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is essential to diagnose and repair the root cause of the problem.
7. Can a DIY enthusiast fix the Output Shaft Speed Circuit Intermittent Malfunction (P1900) code?
- While some aspects of diagnosing and repairing the P1900 code may be within reach of a knowledgeable DIY enthusiast, it is recommended to consult a professional mechanic for accurate diagnosis and repair, especially when dealing with transmission-related issues.
8. How much does it typically cost to repair the P1900 code?
- The cost of repairing the P1900 code can vary depending on the underlying cause of the issue, the labor rates in your area, and the cost of parts needed for the repair. It is advisable to obtain multiple quotes from reputable mechanics for an accurate estimate.
9. Are there any preventative measures to avoid the P1900 code from recurring?
- Regular maintenance of your vehicle, including checking and replacing transmission fluid at the recommended intervals, can help prevent issues that may trigger the P1900 code. Additionally, addressing any warning signs promptly can prevent further damage.
10. Is the P1900 code specific to certain vehicle makes and models?
- The P1900 code, indicating an Output Shaft Speed Circuit Intermittent Malfunction, can be found in various vehicle makes and models, particularly those equipped with OBDII systems and automatic transmissions. It is essential to consult your vehicle's specific diagnostic manual for accurate information.
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