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🔧 Engine-Related Codes (P-codes)

P0300 – Random/Multiple Cylinder Misfire Detected

* Symptoms: Engine shaking, rough idle, lack of power
* Common causes: Worn spark plugs, faulty ignition coils, fuel injector issues, poor fuel quality
* Fix: Replace spark plugs, test coils, clean injectors

P0301–P0304 – Cylinder Misfire Detected (1–4)

* Specific misfire detected in one of the cylinders
* Same fixes as P0300, with cylinder-specific diagnosis

P0171 – System Too Lean (Bank 1)

* Symptoms: Check engine light, hesitation on acceleration
* Causes: Vacuum leaks, dirty MAF sensor, weak fuel pump
* Fix: Inspect vacuum lines, clean or replace MAF, check fuel pressure

P0420 – Catalyst System Efficiency Below Threshold (Bank 1)

* Symptoms: Check engine light, possible reduced fuel efficiency
* Causes: Failing catalytic converter, oxygen sensor fault
* Fix: Test and replace oxygen sensors; if needed, replace catalytic converter

P0113 – Intake Air Temperature Sensor Circuit High Input

* Symptoms: Engine hesitation, high idle RPM
* Cause: Disconnected or failed IAT sensor
* Fix: Reconnect or replace the IAT sensor

P0128 – Coolant Thermostat (Coolant Temperature Below Regulating Temperature)

* Cause: Thermostat stuck open, low coolant level
* Fix: Replace thermostat, check coolant

P0507 – Idle Control System RPM Higher Than Expected

* Symptoms: High idle, rough idle, stalling
* Cause: Vacuum leaks, dirty throttle body
* Fix: Clean throttle body, check for intake leaks

⚙️ Transmission and CVT Faults

P0700 – Transmission Control System Malfunction

* General code indicating a transmission issue
* Often accompanied by CVT-specific codes
* Fix: Requires full scan of the TCM (Transmission Control Module)

P0715 – Input/Turbine Speed Sensor Malfunction

* Symptoms: Jerky shifting, limp mode
* Cause: Faulty input speed sensor
* Fix: Replace speed sensor

P0720 – Output Speed Sensor Circuit Malfunction

* Symptoms: Incorrect speedometer reading, shift hesitation
* Fix: Check and replace output sensor

P0730 – Incorrect Gear Ratio

* Cause: CVT belt wear, transmission fluid issue
* Fix: Check fluid level and condition; in severe cases, CVT replacement

🔋 Electrical and Sensor Codes

P0500 – Vehicle Speed Sensor Malfunction

* Symptoms: Speedometer not working, ABS light on
* Fix: Replace VSS sensor

P0562 – System Voltage Low

* Symptoms: Dim lights, weak starting, various sensor faults
* Causes: Weak alternator, battery, corroded ground points
* Fix: Test charging system, clean terminals, replace battery if needed

U0100 – Lost Communication with ECM/PCM

* Symptoms: Intermittent stalling, limp mode, unresponsive throttle
* Cause: Loose ground, poor battery connection, faulty ECU wiring
* Fix: Check grounds, battery terminals, and connectors at ECU

P0135 – O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

* Cause: Blown fuse, bad O2 sensor, wiring issue
* Fix: Replace sensor, check wiring and fuses


🚑 ABS and Brake System Codes

C0035 – Left Front Wheel Speed Sensor Circuit

C0040 – Right Front Wheel Speed Sensor Circuit

* Symptoms: ABS/ESP warning light
* Fix: Clean or replace wheel speed sensor

C0050 – Right Rear Wheel Speed Sensor Circuit

* Same as above, but for rear sensor
* Fix: Replace sensor, check wiring harness for damage

C0110 – Pump Motor Circuit Malfunction

* Cause: Faulty ABS pump motor or relay
* Fix: Replace motor or pump control module

📡 CAN Bus and Communication Errors

U0140 – Lost Communication With Body Control Module (BCM)

* Symptoms: Malfunctioning lights, power windows, door locks
* Fix: Inspect BCM wiring and power supply, scan for additional faults

U0155 – Lost Communication With Instrument Panel Cluster (IPC)

* Symptoms: Dashboard goes dark, gauges freeze
* Fix: Check instrument cluster connectors, perform reflash if needed

U0121 – Lost Communication With ABS Control Module

* Cause: Wiring fault, damaged control module
* Fix: Inspect CAN lines, replace ABS module if necessary


❄️ HVAC and Climate Control Codes

 B1241 – Air Mix Door Circuit Malfunction

* Symptoms: Inconsistent cabin temperature
* Fix: Replace or recalibrate blend door actuator

B1443 – A/C Pressure Sensor Fault

* Symptoms: A/C not working
* Fix: Replace pressure sensor, check refrigerant level


🔌 How to Read and Clear Codes

To read and clear DTCs on your Chery Tiggo 2:

1. Use an OBD-II scanner compatible with Asian vehicles.
2. Plug it into the diagnostic port (usually under the dashboard).
3. Scan for fault codes and note the descriptions.
4. Clear codes only after resolving the issue — don’t just erase them.


🛠️ Recommended Maintenance Tools

* Basic OBD2 scanner (e.g., Autel, Launch, Ancel)
* MAF sensor cleaner
* Multimeter for testing voltages
* Service manual or Chery diagnostic software (for advanced users)


✅ Final Advice

Chery Tiggo 2 can trigger codes for both minor and serious issues. Don't ignore warning lights — even common codes like P0420 or P0171 may point to bigger problems if left unresolved.

Regular diagnostics, proper maintenance, and addressing codes early will help your Tiggo 2 stay reliable for years to come. Always document resolved codes to track your vehicle’s health over time.