P17CE Code - Input Speed Sensor Direction Not Plausible
Quick Answer
The Diagnostic Trouble Code (DTC) P17CE indicates that the Input Speed Sensor (ISS) is reporting a direction of rotation that is not plausible or expected by the Transmission Control Module (TCM). Common causes include Faulty Transmission Input Speed Sensor, Open or shorted wiring in the Transmission Input Speed Sensor harness, Poor electrical connection within the Transmission Input Speed Sensor circuit. 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
- P17CE indicates Input Speed Sensor Direction Not Plausible.
- Common causes
- Common causes include Faulty Transmission Input Speed Sensor, Open or shorted wiring in the Transmission Input Speed Sensor harness, Poor electrical connection within the Transmission Input Speed Sensor circuit.
- 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 P17CE Description
The Diagnostic Trouble Code (DTC) P17CE indicates that the Input Speed Sensor (ISS) is reporting a direction of rotation that is not plausible or expected by the Transmission Control Module (TCM). The ISS is a critical component in the vehicle's transmission system, responsible for monitoring the rotational speed of the primary pulley. It utilizes a hall-effect mechanism to generate a signal that reflects the speed of the 1-2-3-4 and 3-5-R clutch housing. This data is vital for the TCM to make informed decisions regarding line pressure, shift patterns, and overall transmission performance. When the TCM detects that the ISS signal voltage exceeds 4.75 volts for a duration of 0.8 seconds, it triggers the P17CE code.
Common Causes of P17CE
- Faulty Transmission Input Speed Sensor
- Open or shorted wiring in the Transmission Input Speed Sensor harness
- Poor electrical connection within the Transmission Input Speed Sensor circuit
- Defective Control Solenoid Valve Assembly
- Contaminated transmission fluid or low fluid levels affecting sensor performance
Symptoms of P17CE
- Engine Light ON (or Service Engine Soon Warning Light)
- Erratic or harsh shifting during acceleration
- Decreased fuel efficiency
- Transmission slipping or failing to engage
- Unusual noises from the transmission during operation
How to Fix P17CE
- Perform a visual inspection of the Transmission Input Speed Sensor and its wiring for any signs of damage or wear.
- Test the Input Speed Sensor using a multimeter to check for proper voltage and signal output.
- If the sensor is faulty, replace the Input Speed Sensor with a new, OEM-quality part.
- Inspect and repair any damaged wiring or connectors in the ISS circuit to ensure a solid electrical connection.
- Clear the DTC from the TCM and conduct a road test to verify that the issue has been resolved and the transmission operates smoothly.
Cost to Fix P17CE
The cost to diagnose and repair a P17CE code typically ranges from $150 to $600, depending on the specific cause of the issue. Replacing the Input Speed Sensor may cost between $100 and $300 for parts, while labor can range from $80 to $150 per hour, depending on the shop's location and reputation. Dealerships may charge higher rates, while independent shops tend to be more affordable. Additional costs may arise if there are issues with wiring or the Control Solenoid Valve Assembly that also need attention.
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Code P17CE Information for Specific Makes
- P17CE Chevrolet — Input Speed Sensor Direction Not Plausible
- P17CE GMC — Input Speed Sensor Direction Not Plausible
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