◆OBD Codes

C0202

ABS Motor Relay Circuit Short to Battery

Severeelectrical

Overview

The C0202 code indicates that the chassis control module has detected a abs motor relay circuit short to battery condition. This relates to the vehicle's chassis systems including ABS, stability control, steering, and suspension. A fault in these systems can affect vehicle safety and handling, and should be diagnosed and repaired promptly.

Symptoms

  • Battery draining overnight
  • Vehicle going into limp mode or reduced power
  • Erratic gauge readings
  • Vehicle not starting or cranking slowly

Common Causes

  • Water damage to electrical connectors
  • Short or open circuit in wiring
  • Internal module software error
  • Faulty alternator/generator

Diagnosis Steps

  1. 1Connect an OBD-II scanner and read all stored trouble codes and freeze frame data
  2. 2Check battery voltage and charging system output with a multimeter
  3. 3Inspect wiring and connectors related to the trouble code
  4. 4Test circuit voltage, ground, and resistance with a multimeter
  5. 5Check related fuses and relays

Estimated Repair Cost

$75 — $400

Cost varies by vehicle, location, and repair shop. Includes parts and labor.

Commonly Affected Vehicles

Chevrolet ColoradoToyota TacomaHonda RidgelineNissan Titan

Related Codes

P0606P0335P0340

More Electrical Codes

B0001Driver Frontal Airbag Deployment Loop Circuit Open
Critical
B0002Driver Frontal Airbag Deployment Loop Circuit Short to Ground
Critical
B0003Driver Frontal Airbag Deployment Loop Circuit Short to Battery
Critical
B0004Driver Frontal Airbag Deployment Loop Resistance Too High
Critical
B0005Driver Frontal Airbag Deployment Loop Resistance Too Low
Critical
B0006Passenger Frontal Airbag Deployment Loop Circuit Open
Critical

Frequently Asked Questions

Electrical codes can be challenging because they often involve intermittent issues. A thorough inspection of wiring, connectors, and grounds with a multimeter is essential for accurate diagnosis.