P1555 Chevrolet Code - Electronic Variable Orifice Output
Quick Answer
The P1555 Chevrolet code refers to an issue with the Electronic Variable Orifice (EVO) system output. Common causes include Malfunctioning EVO solenoid, Faulty EVO valve, Clogged or restricted EVO 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
- P1555 Chevrolet indicates Electronic Variable Orifice Output.
- Common causes
- Common causes include Malfunctioning EVO solenoid, Faulty EVO valve, Clogged or restricted EVO 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.
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Code P1555 Chevrolet Description
The P1555 Chevrolet code refers to an issue with the Electronic Variable Orifice (EVO) system output. The EVO system is responsible for controlling the flow of hydraulic fluid in power steering systems, which helps to adjust the steering effort based on vehicle speed. When this code is triggered, it indicates a problem with the EVO system's ability to regulate the orifice output, potentially leading to issues with power steering performance.
Common Causes of P1555 Chevrolet
- Malfunctioning EVO solenoid
- Faulty EVO valve
- Clogged or restricted EVO filter
- Power steering pump issues
- Electrical wiring or connection problems
Symptoms of P1555 Chevrolet
- Stiff or hard steering at low speeds
- Steering wheel vibration or shimmy
- Steering wheel drifts or feels loose
- Unusual noises when turning the steering wheel
- Power steering fluid leaks
How to Fix P1555 Chevrolet
- Diagnose the issue using a scan tool to confirm the P1555 code and pinpoint the exact problem within the EVO system.
- Inspect the EVO solenoid, valve, and filter for any signs of damage or blockages; replace any faulty components as needed.
- Check the power steering pump for proper operation and pressure; repair or replace if necessary.
- Clear the diagnostic trouble codes from the vehicle's computer after repairs are completed.
- Test drive the vehicle to ensure that the power steering system is functioning correctly and that the code does not reappear.
Cost to Fix P1555 Chevrolet
The cost of repairing a P1555 Chevrolet code can vary depending on the specific cause of the issue and the parts and labor required for repairs. On average, the cost of addressing this problem can range from $200 to $500, including parts and labor. However, prices may vary based on the location, vehicle make and model, and the shop's hourly labor rates. It's recommended to obtain a detailed quote from a trusted auto repair shop to get an accurate estimate for the repair.
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Frequently Asked Questions about P1555 Chevrolet Code
Q: What does the OBDII code P1555 mean on a Chevrolet?
A: Code P1555 indicates an issue with the Electronic Variable Orifice (EVO) system, which controls the power steering assist based on vehicle speed.
Q: What are common symptoms of P1555 on a Chevrolet?
A: Symptoms may include heavy or inconsistent steering effort, loss of speed-sensitive power steering assist, or the illumination of the check engine light.
Q: What causes the P1555 code to appear on a Chevrolet?
A: Common causes include a faulty EVO actuator, damaged wiring or connectors, or problems with the power steering control module.
Q: Can I drive my Chevrolet with the P1555 code active?
A: While the vehicle may still be drivable, the steering may feel different or less responsive, which can pose safety risks, especially at higher speeds.
Q: How is the P1555 code diagnosed?
A: A mechanic uses an OBDII scanner to confirm the code, checks the EVO system components, inspects wiring and connectors, and tests the power steering control module.
Q: What repairs are typically needed to fix the P1555 code on a Chevrolet?
A: Repairs may include replacing the EVO actuator, repairing damaged wiring, or replacing the power steering control module if necessary.
Q: Is the P1555 code specific to certain Chevrolet models?
A: Yes, it is more common in older Chevrolet models equipped with the EVO system for speed-sensitive steering.
Q: Can a bad power steering fluid affect the P1555 code?
A: While not a direct cause, dirty or low power steering fluid can strain the system and exacerbate underlying issues tied to the EVO system.
Q: How much does it cost to repair the P1555 code on a Chevrolet?
A: Repair costs vary but can range from $100 to $500, depending on whether the issue is with the actuator, wiring, or control module.
Q: How can I prevent the P1555 code from appearing again?
A: Regular maintenance of the power steering system, including fluid checks and inspections of wiring and connectors, can help prevent recurrence.
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