2005 Chrysler PT Cruiser Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2005 Chrysler PT Cruiser and How to Fix Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2005 Chrysler PT Cruiser cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2005 Chrysler PT Cruiser cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

When the throttle position sensor fails, the engine's computer tends to overcompensate with fuel, leading black exhaust coming from the tailpipe. There is a strong possibility of engine misfires, and the check engine light will come on.

Throttle position sensors can also develop "dead spots," or certain places along the throttle curve where it doesn't get a reading. When this happens, the above symptoms can occur but then stop when you further press or let off the gas pedal.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

What are the steps to diagnose the cruise control issue in a 2005 Chrysler PT Cruiser?

To effectively diagnose a cruise control issue in your 2005 Chrysler PT Cruiser, begin with the simplest solutions before moving on to more intricate assessments. Start by checking the cruise control fuse in the fuse box, as a blown fuse can often be the root of the problem. Next, inspect the cruise control buttons on the steering wheel to ensure they are functioning correctly and not stuck, as this can prevent the system from engaging. Following this, examine the vacuum lines for any signs of leaks or damage, as these are crucial for the system's operation. If these initial checks do not resolve the issue, utilize an OBD-II scanner to look for any error codes that may indicate specific problems within the cruise control system. Testing the cruise control module is also essential, as it must send signals accurately for the system to work. Additionally, verify that the vehicle's speed sensors are operational, since they play a vital role in cruise control functionality. Finally, inspect all wiring connections related to the cruise control system for any loose or damaged wires. If you still encounter issues after these steps, it may be time to consult a professional mechanic for further assistance. By following this structured approach, you can systematically identify and address the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2005 Chrysler PT Cruiser?

When troubleshooting cruise control issues in a 2005 Chrysler PT Cruiser, it's essential to consider several common problems that could be at play. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging since this switch is designed to disengage the system when the brakes are applied. Additionally, a defective speed sensor may disrupt the communication between the vehicle's speed control system and the engine, leading to failure in maintaining speed. It's also wise to check for a blown fuse in the cruise control system, as this can completely halt its operation. Another potential issue is vacuum leaks within the engine, which can interfere with the cruise control's ability to maintain a steady speed; inspecting the vacuum lines for any leaks is crucial. Lastly, a malfunctioning cruise control module may require replacement to restore functionality. By systematically addressing these common problems, you can effectively troubleshoot and potentially resolve the cruise control issues in your PT Cruiser.

How urgent is it to address the malfunctioning cruise control in a 2005 Chrysler PT Cruiser?

Addressing a malfunctioning cruise control in a 2005 Chrysler PT Cruiser is not just a matter of convenience; it is a critical safety concern that requires immediate attention. A malfunction can lead to erratic vehicle behavior, such as unexpected acceleration or deceleration, which can endanger both the driver and others on the road. Moreover, neglecting these symptoms can compromise your control over the vehicle's speed, especially in challenging driving conditions like heavy traffic or inclement weather. Beyond safety, delaying repairs can exacerbate the issue, potentially leading to more extensive damage to the vehicle's systems, which could result in higher repair costs down the line. Therefore, it is essential to prioritize the repair of your cruise control system to ensure safe and reliable operation of your PT Cruiser.

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