Code
P1570
CHRYSLER
P — Powertrain
Cruise Control System Traction Control Active
Views:
UK: 32
EN: 34
RU: 27
AI status
Completed
Completed
100%
Causes
- Active traction control/ABS event (wheel slip)
- Intermittent or failed wheel speed sensor
- Faulty brake light switch or brake switch circuit
- Poor tire traction (ice, mud, snow) or mismatched tires
- Faulty ABS/traction control module or wiring/connectors
- Loss of vehicle speed signal or CAN communication fault
Symptoms
- Cruise control inoperative or disabled message
- TCS/ABS warning lamp illuminated on dash
- Intermittent cruise availability (works then drops out)
- Traction control active indicator visible during low traction events
- Possible reduced engine torque or altered driveability during TCS intervention
- Vehicle speed gauge may fluctuate or be unreliable
What to check
- Scan PCM, ABS and instrument cluster for stored and pending codes; record freeze-frame data
- Verify TCS/ABS and cruise control warning lamps behavior at key ON and during a road test
- Inspect tires for proper inflation, tread and size/matching across axles
- Visually inspect wheel speed sensors and tone rings for contamination or damage
- Check brake light switch operation and verify brake lamp and brake switch signal to PCM
- Check ABS/traction control module power and ground fuses, relays and connector security
Signal parameters
- Individual wheel speed sensor voltages/frequency (Hz) or counts
- Vehicle speed (VSS) from PCM/ABS
- Brake switch state (On/Off, voltage)
- TCS/ABS active flag/event count
- Yaw rate or steering angle sensor values (if equipped)
- Engine torque reduction / requested torque values
Diagnostic algorithm
- Connect a scan tool to read and record DTCs from PCM, ABS/TCS and instrument cluster and save freeze-frame data.
- Confirm the cruise control is disabled and note when TCS active indicator appears (conditions, speed, road surface).
- Visually inspect tires for mismatches, low pressure, or extreme wear; correct tire issues before further diagnosis.
- Inspect wheel speed sensors and tone rings for physical damage, contamination, or missing teeth; clean if dirty.
- Using a scope or multimeter, verify each wheel speed sensor signal at idle and during wheel rotation; compare channels for consistency.
- Verify brake light operation and check brake light switch continuity and signal to the PCM while operating the pedal.
- Check ABS/TCS module power and ground circuits (fuses, relays, connector pins) and repair as needed.
- Check for CAN communication codes (U codes) and repair wiring/terminals if modules are not communicating.
- Clear codes and perform a controlled road test to try to reproduce the fault while monitoring live data for wheel speed discrepancies or TCS activation.
- If a specific sensor or circuit is confirmed faulty, replace or repair per factory procedure, then clear codes and verify repair with another road test. Consult service manual/TSBs for vehicle-specific procedures and calibration steps.
Likely causes
- Contaminated/damaged wheel speed sensor or tone ring
- Brake switch out of adjustment or failed contacts
- Corroded connector or damaged wiring to ABS module or sensors
- ABS module fault or internal fault in traction control system
- Low battery/poor ground causing intermittent module behavior
- Tire condition or large difference in tire diameter causing slip detection
Fault status
Status
Cruise control is disabled because the traction control/ABS system is reporting intervention or a fault. The TCS/ABS lamp or traction active indicator may be lit. Cruise will remain unavailable until the traction control condition clears or the underlying fault is repaired.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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