OBD2 Fault Code Library

Free lookup for thousands of OBD2 trouble codes: filter by family, read short meanings, and open deeper articles. Desktop ELM327 scanner with live data and AI guidance.

OBD2 symptoms

Look up diagnostic trouble codes by what the car is doing: misfire, overheating, rough idle, a check engine light, and other common symptoms.

• Engine misfire
• Engine overheating
• Rough idle
• Check engine light
• Poor fuel economy
• Hard starting
• Engine stalling
• Catalytic converter efficiency
• Oxygen sensor fault
• EVAP leak
• Thermostat not reaching temperature
• Lean air-fuel mixture
• Rich air-fuel mixture
• EGR flow fault
• Engine knock
• Charging system
• Throttle position
• Mass airflow sensor
• Turbo underboost
• Coolant temperature sensor
• Transmission fault

• U0558 — OBD2 code U0558 flags a problem with the vehicle network (CAN bus) communication (invalid data received from front controls/display interface module). Short, gentle driving to a shop is usually possible. Common culprits: poor grounds or low battery voltage, corroded connectors, especially in wet areas, aftermarket equipment interfering with the bus.
• U0559 — Invalid Data Received From Radio Transceiver (U0559): a vehicle network fault affecting the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Most often caused by water ingress in harness junctions, a faulty module pulling the bus down, aftermarket equipment interfering with the bus.
• U055A — U055A — Invalid Data Received From Special Purpose Vehicle Control Module "A". A fault in the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Typical causes: aftermarket equipment interfering with the bus, corroded connectors, especially in wet areas, damaged CAN bus wiring or short to power/ground.
• U055B — U055B — Invalid Data Received From Special Purpose Vehicle Control Module "B". A fault in the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Typical causes: damaged CAN bus wiring or short to power/ground, corroded connectors, especially in wet areas, poor grounds or low battery voltage.
• U055C — U055C — Invalid Data Received From Special Purpose Vehicle Control Module "C". A fault in the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Typical causes: corroded connectors, especially in wet areas, poor grounds or low battery voltage, water ingress in harness junctions.
• U055D — Invalid Data Received From Special Purpose Vehicle Control Module "D" (U055D): a vehicle network fault affecting the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Most often caused by damaged CAN bus wiring or short to power/ground, corroded connectors, especially in wet areas, water ingress in harness junctions.
• U055E — OBD2 code U055E flags a problem with the vehicle network (CAN bus) communication (invalid data received from front controls interface module "B"). Short, gentle driving to a shop is usually possible. Common culprits: aftermarket equipment interfering with the bus, damaged CAN bus wiring or short to power/ground, a faulty module pulling the bus down.
• U0560 — U0560 - Invalid Data Received From Active Safety Control Module 123 (U0560): a vehicle fault affecting the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Most often caused by a faulty module pulling the bus down, corroded connectors, especially in wet areas, water ingress in harness junctions.
• U0561 — Invalid Data Received From Seat Control Switch Module "A" (U0561): a vehicle network fault affecting the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Most often caused by water ingress in harness junctions, poor grounds or low battery voltage, aftermarket equipment interfering with the bus.
• U0562 — OBD2 code U0562 flags a problem with the vehicle network (CAN bus) communication (invalid data received from seat control switch module "B"). Short, gentle driving to a shop is usually possible. Common culprits: poor grounds or low battery voltage, water ingress in harness junctions, damaged CAN bus wiring or short to power/ground.
• U0563 — U0563 — Invalid Data Received From Audio Amplifier "B". A fault in the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Typical causes: aftermarket equipment interfering with the bus, water ingress in harness junctions, a faulty module pulling the bus down.
• U0564 — U0564 — Invalid Data Received From Speech Recognition Module. A fault in the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Typical causes: water ingress in harness junctions, damaged CAN bus wiring or short to power/ground, corroded connectors, especially in wet areas.
• U0565 — U0565 — Invalid Data Received From Camera Module Rear. A fault in the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Typical causes: poor grounds or low battery voltage, aftermarket equipment interfering with the bus, damaged CAN bus wiring or short to power/ground.
• U0567 — U0567 — U0567 - Invalid Data Received From Active Safety Control Module 130. A fault in the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Typical causes: damaged CAN bus wiring or short to power/ground, aftermarket equipment interfering with the bus, water ingress in harness junctions.
• U0568 — U0568 - Invalid Data Received From Active Safety Control Module 131 (U0568): a vehicle fault affecting the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Most often caused by corroded connectors, especially in wet areas, aftermarket equipment interfering with the bus, water ingress in harness junctions.
• U0569 — OBD2 code U0569 flags a problem with the vehicle network (CAN bus) communication (U0569 - invalid data received from active safety control module 132). Short, gentle driving to a shop is usually possible. Common culprits: corroded connectors, especially in wet areas, poor grounds or low battery voltage, damaged CAN bus wiring or short to power/ground.
• U0570 — U0570 — U0570 - Invalid Data Received From Active Safety Control Module 133. A fault in the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Typical causes: aftermarket equipment interfering with the bus, corroded connectors, especially in wet areas, a faulty module pulling the bus down.
• U0571 — U0571 — U0571 - Invalid Data Received From Active Safety Control Module 134. A fault in the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Typical causes: corroded connectors, especially in wet areas, poor grounds or low battery voltage, damaged CAN bus wiring or short to power/ground.
• U0572 — OBD2 code U0572 flags a problem with the vehicle network (CAN bus) communication (U0572 - invalid data received from active safety control module 135). Short, gentle driving to a shop is usually possible. Common culprits: poor grounds or low battery voltage, damaged CAN bus wiring or short to power/ground, corroded connectors, especially in wet areas.
• U0573 — U0573 — U0573 - Invalid Data Received From Active Safety Control Module 136. A fault in the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Typical causes: water ingress in harness junctions, aftermarket equipment interfering with the bus, corroded connectors, especially in wet areas.
• U0574 — U0574 - Invalid Data Received From Active Safety Control Module 137 (U0574): a vehicle fault affecting the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Most often caused by poor grounds or low battery voltage, a faulty module pulling the bus down, aftermarket equipment interfering with the bus.
• U0575 — OBD2 code U0575 flags a problem with the vehicle network (CAN bus) communication (U0575 - invalid data received from active safety control module 138). Short, gentle driving to a shop is usually possible. Common culprits: damaged CAN bus wiring or short to power/ground, aftermarket equipment interfering with the bus, water ingress in harness junctions.
• U0576 — OBD2 code U0576 flags a problem with the vehicle network (CAN bus) communication (U0576 - invalid data received from active safety control module 139). Short, gentle driving to a shop is usually possible. Common culprits: water ingress in harness junctions, damaged CAN bus wiring or short to power/ground, a faulty module pulling the bus down.
• U0577 — U0577 - Invalid Data Received From Active Safety Control Module 140 (U0577): a vehicle fault affecting the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Most often caused by a faulty module pulling the bus down, corroded connectors, especially in wet areas, aftermarket equipment interfering with the bus.