P0737 is an OBD-II trouble code that indicates an issue with the Transmission Control Module (TCM) related to the engine speed output circuit. This code is generally associated with problems in the communication between the engine speed sensor and the TCM, which can affect the vehicle’s transmission performance.
What Does the P0737 Code Mean?
The P0737 code specifically means that the TCM is not receiving accurate information from the engine speed sensor. This sensor is crucial for determining how fast the engine is spinning, which helps the TCM decide when to shift gears. If the TCM gets a faulty signal, it may struggle to shift the transmission properly.
What Causes the P0737 Code?
Several factors can trigger the P0737 code, including:
- Failure of the Crankshaft Position Sensor (CKP)
- Powertrain Control Module (PCM) failure
- Transmission Control Module (TCM) failure
- Wiring issues in the engine speed output circuit
What Are the Symptoms of the P0737 Code?
Drivers experiencing the P0737 code may notice symptoms such as:
- Increased fuel consumption
- Transmission may not shift properly
How Serious Is the P0737 Code?
The P0737 code is considered to have moderate severity. While it may not pose an immediate threat to the vehicle’s safety, it can lead to further complications if not addressed in a timely manner. Proper diagnosis and repair are recommended to ensure the vehicle continues to operate efficiently.
How to Diagnose the P0737 Code
To diagnose the P0737 code, a mechanic will typically follow these steps:
- Use an OBD-II scanner to confirm the presence of the P0737 code and check for any additional codes.
- Inspect the engine speed sensor and its wiring for any signs of damage or disconnection.
- Test the crankshaft position sensor to ensure it is functioning correctly.
- Evaluate the Transmission Control Module (TCM) and Powertrain Control Module (PCM) for any faults.
Common Repairs for the P0737 Code
Repairs for the P0737 code may include:
- Replacing the Crankshaft Position Sensor
- Repairing or replacing damaged wiring in the engine speed output circuit
- Replacing or reprogramming the TCM or PCM if necessary
How Much Does It Cost to Fix the P0737 Code?
The cost to fix the P0737 code can vary widely based on the underlying issue. Generally, you can expect to pay anywhere from $100 to $500 for repairs, depending on whether you need a simple sensor replacement or more extensive work on the TCM or wiring.
Can I Fix the P0737 Code Myself?
While some experienced DIY mechanics may be able to address simple repairs such as replacing the crankshaft position sensor or fixing wiring issues, diagnosing and repairing TCM or PCM problems often requires specialized knowledge and equipment. If you are not confident in your skills, it’s best to consult a professional mechanic.
