What Does C0070 Mean?
This code indicates the ABS control module has detected an electrical fault in the right front wheel speed sensor solenoid circuit number 1. The ABS module continuously monitors the solenoid control circuits for opens, shorts, or excessive resistance. When the commanded state of the solenoid does not match the actual circuit feedback, this code sets and typically disables ABS/traction control functions.
Common Causes
35%
Damaged or corroded wiring harness between ABS module and right front wheel speed sensor/solenoid connector
30%
Failed ABS hydraulic control unit (HCU) with internal solenoid valve failure
20%
Corroded or loose electrical connector at ABS module or HCU
10%
Failed ABS control module with internal driver circuit fault
5%
Damaged wheel speed sensor affecting solenoid control feedback loop
Diagnostic Steps
1
Step 1: Perform visual inspection of right front ABS wiring harness from wheel well to ABS module, checking for damaged insulation, broken wires, water intrusion, or corrosion at connectors. Inspect connector terminals for bent pins or corrosion.
2
Step 2: Using a digital multimeter, measure resistance across the right front ABS solenoid circuit at the ABS module connector (with harness disconnected). Compare readings to manufacturer specifications, typically 3-8 ohms for solenoid coil resistance.
3
Step 3: Check for voltage supply and ground integrity at the ABS module connector using a multimeter. Verify battery voltage (12-14V) on supply pin and less than 0.5V on ground circuit with ignition on.
4
Step 4: Perform solenoid actuation test using advanced scan tool bi-directional controls to command right front solenoid on/off while monitoring current draw. Normal operation should show 0.5-2 amps draw when energized.
5
Step 5: If all wiring tests pass, suspect internal HCU solenoid failure. Remove and inspect HCU for fluid contamination, corrosion, or physical damage to solenoid valve assembly.
6
Step 6: After repairs, clear codes, perform ABS system bleed procedure if HCU was replaced, test drive vehicle at speeds above 15 mph to verify ABS self-test completes successfully and code does not return.
Estimated Repair Cost
$150 - $1,500
Parts + labor, varies by vehicle and location
This code indicates the ABS control module has detected an electrical fault in the right front wheel speed sensor solenoid circuit number 1. The ABS module continuously monitors the solenoid control circuits for opens, shorts, or excessive resistance. When the commanded state of the solenoid does no...
The most common cause of C0070 (Right Front ABS Solenoid #1 Circuit Malfunction) is: Damaged or corroded wiring harness between ABS module and right front wheel speed sensor/solenoid connector
Typical repair costs for C0070 range from $150 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive with normal braking function maintained, but ABS and traction control systems will be disabled. Braking distance may increase on slippery surfaces and wheels may lock during hard braking. Repair should be completed soon to restore full safety system functionality.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C0070 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Chassis
System
Anti-lock Braking System (ABS)
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
