What Does C1498 Mean?
This code indicates the traction control motor potentiometer circuit is shorted to ground. The position feedback signal is being held at 0V, which the module interprets as an impossibly low position reading. The module cannot distinguish a legitimate zero-position reading from a ground short, so it disables traction control as a precaution. This fault is often caused by physical wire damage in the harness.
Common Causes
40%
Potentiometer signal wire insulation damaged where it contacts a chassis ground point or the TC motor housing
25%
Moisture intrusion into the potentiometer connector creating a conductive path between the signal and ground pins
20%
Potentiometer internal failure where the wiper element has shorted to the ground trace on the substrate
15%
ABS/TC module internal ground fault on the potentiometer input, pulling the signal line low
Diagnostic Steps
1
Step 1: Disconnect the potentiometer connector and measure resistance from the signal pin to chassis ground at the harness side. If less than 100 ohms, the signal wire has a short to ground in the harness.
2
Step 2: If the harness tests clean (OL to ground), reconnect the potentiometer and remeasure. A short present only when the potentiometer is connected confirms an internal fault in the sensor.
3
Step 3: Inspect the connector for moisture, corrosion, or debris. The potentiometer connector on the TC motor is often in an exposed location in the engine bay. Clean and apply dielectric grease.
4
Step 4: If the short is in the harness, section-test by disconnecting at intermediate points to narrow down the affected segment. Pay special attention to where the wire passes near the motor housing, as the vibrating motor can abrade wire insulation over time.
5
Step 5: Repair the short and verify the signal voltage returns to the correct range (varies with actuator position, typically 0.5-4.5V). Clear codes, calibrate the TC motor position, and verify traction control operation during a test drive.
Estimated Repair Cost
$80 - $650
Parts + labor, varies by vehicle and location
This code indicates the traction control motor potentiometer circuit is shorted to ground. The position feedback signal is being held at 0V, which the module interprets as an impossibly low position reading. The module cannot distinguish a legitimate zero-position reading from a ground short, so it ...
The most common cause of C1498 (Traction Control Motor Potentiometer Circuit Short to Ground) is: Potentiometer signal wire insulation damaged where it contacts a chassis ground point or the TC motor housing
Typical repair costs for C1498 range from $80 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A grounded potentiometer signal disables traction control completely. The vehicle cannot electronically manage wheel spin during acceleration, which is particularly dangerous on wet, icy, or loose surfaces where wheelspin can lead to loss of directional control.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1498 to identify the root cause.
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Quick Info
Category
Chassis
System
Traction Control System
Difficulty
Type
Manufacturer
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