What Does P0569 Mean?
The ECM has detected a malfunction in the cruise control COAST signal circuit. The COAST function allows the driver to gradually reduce the set cruise speed by holding the COAST (or SET/COAST) button. The ECM is not receiving the expected COAST command signal, which may be a dedicated switch input or a sustained hold of the SET button, depending on vehicle design.
Common Causes
40%
Worn cruise control COAST switch contacts or failed detent mechanism in the multi-function stalk preventing COAST signal generation
25%
Open or high-resistance wire in the COAST signal circuit preventing the command voltage from reaching the ECM
25%
Clock spring fault affecting the COAST signal trace, potentially from a partially broken ribbon cable
10%
Incorrect resistance value in the COAST position of the cruise control resistive-ladder network
Diagnostic Steps
1
Step 1: With cruise control engaged, press and hold the COAST button while monitoring the cruise set speed on the instrument cluster. If the speed does not decrease, monitor the ECM cruise input voltage for the expected COAST command level.
2
Step 2: Measure resistance at the cruise control switch connector in the COAST position. Compare to manufacturer specification for the COAST resistor value in the ladder network.
3
Step 3: Backprobe the cruise control signal at the ECM while actuating the COAST function. Verify the voltage reaches the expected level for the COAST command.
4
Step 4: If other cruise functions work but COAST does not, the fault is likely in the switch itself (specific contact for COAST) or a single trace in the clock spring. Test clock spring continuity on the relevant circuit.
5
Step 5: Replace the cruise control switch assembly if the COAST contact resistance is out of specification. If the clock spring is at fault, replace the entire clock spring assembly and re-center it during installation.
Estimated Repair Cost
$40 - $350
Parts + labor, varies by vehicle and location
The ECM has detected a malfunction in the cruise control COAST signal circuit. The COAST function allows the driver to gradually reduce the set cruise speed by holding the COAST (or SET/COAST) button. The ECM is not receiving the expected COAST command signal, which may be a dedicated switch input o...
The most common cause of P0569 (Cruise Control Coast Signal Malfunction) is: Worn cruise control COAST switch contacts or failed detent mechanism in the multi-function stalk preventing COAST signal generation
Typical repair costs for P0569 range from $40 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Loss of the COAST function only affects the ability to gradually reduce cruise set speed. The driver can still cancel cruise with the brake pedal and re-set at a lower speed. No safety concern exists.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0569 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Cruise Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
