What Does C0630 Mean?
This diagnostic trouble code indicates that the control module has detected a fault in the right rear position sensor circuit or signal. This sensor is part of the vehicle's suspension or ride height control system, providing feedback on suspension position, ride height, or shock absorber position. The control module has determined that the sensor signal is erratic, out of range, or absent entirely.
Common Causes
45%
Faulty right rear position sensor with internal failure or worn potentiometer
30%
Damaged wiring harness or corroded connector at right rear position sensor
15%
Sensor mounting bracket broken or sensor misaligned preventing proper operation
10%
Control module internal fault or corrupted calibration data
Diagnostic Steps
1
Step 1: Perform visual inspection of right rear position sensor, mounting bracket, linkage arms, and wiring harness for physical damage, corrosion, or disconnection. Check sensor alignment and ensure linkage moves freely through full range of motion.
2
Step 2: Using a multimeter, back-probe the sensor connector and check reference voltage (typically 5V) and ground circuit continuity with key on, engine off. Verify voltage remains stable and ground resistance is below 0.5 ohms.
3
Step 3: Monitor live sensor data on scan tool while manually moving the suspension through its travel range (lift and lower vehicle or compress suspension). Signal should sweep smoothly between approximately 0.5V and 4.5V without dropouts or erratic readings.
4
Step 4: Disconnect sensor connector and measure sensor resistance across signal and ground pins while manually actuating the sensor arm. Resistance should change smoothly without dead spots (typically 1-10k ohms range depending on manufacturer).
5
Step 5: Check wiring continuity from sensor connector to control module using wiring diagram. Test for short circuits to ground or power, and verify no excessive resistance (should be below 5 ohms per circuit).
6
Step 6: After repairs, clear codes, perform suspension relearn/calibration procedure per manufacturer specifications, and road test vehicle through various suspension movements to verify repair and confirm code does not return.
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
This diagnostic trouble code indicates that the control module has detected a fault in the right rear position sensor circuit or signal. This sensor is part of the vehicle's suspension or ride height control system, providing feedback on suspension position, ride height, or shock absorber position. ...
The most common cause of C0630 (Right Rear Position Sensor Malfunction) is: Faulty right rear position sensor with internal failure or worn potentiometer
Typical repair costs for C0630 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is generally safe to drive, but adaptive suspension, electronic ride control, or self-leveling functions will be disabled or operating in fail-safe mode. This may result in degraded ride quality, improper vehicle height, and reduced handling performance, especially when loaded.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C0630 to identify the root cause.
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Quick Info
Category
Chassis
System
Suspension Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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