Modern Chery vehicles, including the Tiggo 2, are equipped with an onboard diagnostic system (OBD-II) that helps identify and report malfunctions. In this guide, we break down the most common Diagnostic Trouble Codes (DTCs) reported by owners and service technicians, with detailed explanations and troubleshooting tips.
🔧 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:
- Use an OBD-II scanner compatible with Asian vehicles.
- Plug it into the diagnostic port (usually under the dashboard).
- Scan for fault codes and note the descriptions.
- 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)
Real Owner Cases & Fixes
Andrey – Perm, Russia – 2019 Tiggo 2 – 78,000 km “Check Engine at 72k km – P0420. Everyone said ‘new catalytic converter, $1,200’. I installed a $7 mini-cat spacer on the downstream O₂ sensor + Euro-2 remap for $50. Code gone forever, fuel consumption even dropped 0.7 L/100 km.”
Marina – Krasnodar, Russia – 2022 Tiggo 2 Pro – 41,000 km “P0171 + jerking on acceleration. Dealer wanted to replace the whole intake. I cleaned the MAF sensor myself with Liqui Moly spray ($6) and changed the air filter – error disappeared after 30 miles. Saved ~$350.”
Sergey – Yekaterinburg, Russia (–38 °C winters) – 2020 Tiggo 2 – 58,000 km “U0100 + random stalling. Dealer quoted $1,800 for new ECU. Turned out to be a corroded ground strap near the battery. Cleaned it, applied dielectric grease – zero issues for the last 2 years.”
Vitaly – Rostov-on-Don, Russia – 2018 Tiggo 2 – 112,000 km “P0300 + engine misfiring. Replaced NGK spark plugs ($15 set) and two used ignition coils ($40 each from a breaker). 48,000 km later – still running perfectly.”
Oleg – Novosibirsk, Russia – 2021 Tiggo 2 – 65,000 km “C0035 & C0040 – ABS/ESP lights on. Front wheel speed sensors died from road salt. Replaced with ERA aftermarket sensors ($15 each) – all lights gone instantly.”
Denis – Chery specialist, Samara, Russia “In 85 % of Tiggo 2 P0420 cases it’s ONLY the downstream oxygen sensor. We replace just the sensor (Bosch 0258007206, $45–60) + spacer or Euro-2 flash – catalytic converter stays untouched. P0171 is almost always a dirty MAF or cracked intake boot. P0300 is 90 % plugs & coils, 10 % injectors.”
Author’s Verdict
After 7 years and 680+ Tiggo 2 units serviced across Russia, I can confirm: the 1.5L SQRE4G15 engine easily lasts 300,000+ km on decent oil and 92-octane fuel. The Jatco JF015E CVT reaches 200,000 km if you change the fluid every 40,000 km. 99 % of “scary” codes (P0420, P0171, U0100) are fixed for $20–100: sensor cleaning/replacement, ground repair, or Euro-2 flash. Do oil changes every 8–10k km, use 5W-30 SP, never skip CVT fluid changes, and the Tiggo 2 will outlast most Korean rivals in the segment with almost zero major repairs up to 200,000 km.
✅ 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.
❓ FAQ — Chery Tiggo 2 Fault Codes
What is the most common fault code in Chery Tiggo 2?
The most frequently reported code is P0420 (Catalyst System Efficiency Below Threshold). It often points to a failing catalytic converter or a faulty oxygen sensor.
Can I keep driving with a P0171 code?
Technically yes, but it is not recommended. Driving with a lean condition (P0171) can cause engine damage over time and reduce fuel efficiency.
How do I clear a fault code without a scanner?
While some codes may temporarily clear after disconnecting the battery for 10–15 minutes, this is not a proper solution. Always use an OBD-II scanner to diagnose and clear codes after fixing the root cause.
What happens if I ignore ABS-related codes like C0035 or C0040?
Ignoring ABS or wheel speed sensor codes can disable ABS and ESP functions, increasing stopping distances and reducing vehicle stability during emergency maneuvers.
Is a P0300 code dangerous?
Yes. A random misfire (P0300) can lead to catalytic converter damage, poor performance, and unsafe driving conditions. It should be addressed immediately.
Why does my Tiggo 2 show U-codes (communication errors)?
U-codes, such as U0100 or U0140, indicate communication problems between control modules. These can be caused by loose connectors, faulty wiring, or weak battery/ground connections.
How often should I scan for DTCs even if there’s no check engine light?
It’s a good practice to scan your vehicle at least once every few months or before long trips. Some codes (pending or stored) may not trigger the light immediately but still affect performance.
Can I use a generic OBD2 scanner on Chery Tiggo 2?
Yes. Most modern generic OBD-II scanners work with the Tiggo 2. However, for more advanced diagnostics (like ABS or BCM faults), a professional scanner supporting extended Chery protocols is recommended.
📚 Sources
This article is based on official documentation, owner reports, and real workshop diagnostics. Information is current as of 2025.
- Official Chery Tiggo 2 / Tiggo 2 Pro Service Manual (2016–2025).
- Chery Russia technical bulletins (catalyst failures, CVT issues, electronics).
- Owner forums: Chery-Club.ru, Drive2.ru (tag “Tiggo 2 problems”), Tiggo2.ru.
- Telegram groups: “Chery Tiggo 2 Russia”, “Chery 1.5 owners”.
- Real-world cases collected 2017–2025 from forums and direct workshop diagnostics.
- Author’s own workshop database (680+ Tiggo 2 units serviced from 2018 to 2025).
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