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.
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.
To effectively diagnose the non-functioning cruise control in your 2002 Volvo C70, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the control module, sensor, throttle, and switch, as these components are often the culprits behind cruise control failures. Next, pay attention to the brake pedal position switch, which can cause intermittent issues; even if it has been replaced, environmental factors may still impact its performance. Additionally, check the cruise control fuse located in the fuse box, as a blown fuse can completely disable the system. If these initial checks do not resolve the issue, it may be time to consult a professional mechanic or a Volvo specialist for a more thorough diagnosis. By following this structured approach, you can efficiently identify the root cause of the cruise control malfunction and take appropriate action.
See what others are asking about their Volvo C70. Get answers from RepairPal's community of auto experts and enthusiasts.
Read about related problems experienced by other Volvo C70 drivers like you.
