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Renault
🚨 Critical
Renault
P0038
RENAULT P0038 HO2S Heater Control Circuit High (Bank 1 Sensor 2)
Serious internal fault within the engine management system of a Renault. It indicates a failure that could lead to engine stalling or long-term damage.
Brand
Renault
Fault Code
P0038
Severity
🚨 Critical
Models
Clio, Megane, Laguna, Scenic, Kangoo, Duster, Sandero
🛠️ Diagnostic Overview
Difficulty Level
🛠️🛠️🛠️
Hard (Advanced)
Estimated Time
⏱️ 3-6 Hours
🧰 Required Tools
- ✓ Digital Multimeter
- ✓ Socket Wrench & Hand Tools
- ✓ Smoke Leak Detector / Vacuum Gauge
- ✓ Electrical Contact Cleaner Spray
⚠️ Possible Causes
- • Vacuum leaks in the intake system
- • Dirty sensor elements (oil/carbon)
- • Frayed wires due to engine vibration.
🔧 Recommended Fixes
- → Trace the circuit wiring from the sensor to the ECU. Secure all connections and ensure the battery is providing a stable 12V output.
🚨 This fault is CRITICAL! Stop driving immediately and consult a qualified technician.
🚗 Commonly Affected Vehicles
🏭 Renault – Other Common Fault Codes
U0100
RENAULT U0100 Lost Communication With ECM/PCM A
🚨 Critical
B1000
RENAULT B1000 Airbag Control Module Fault
🟡 Medium
P2293
RENAULT P2293 Fuel Pressure Regulator 2 Performance
🔴 High
P2279
RENAULT P2279 Intake Air System Leak
🟡 Medium
P219A
RENAULT P219A Bank 1 Air-Fuel Ratio Imbalance
🟡 Medium
P2181
RENAULT P2181 Cooling System Performance
🟡 Medium
P2096
RENAULT P2096 Post Catalyst Fuel Trim System Too Lean
🟡 Medium
P2015
RENAULT P2015 Intake Manifold Runner Position Sensor Circuit Range
🔴 High
P1101
RENAULT P1101 MAF Sensor Out of Self Test Range
🟡 Medium
P0741
RENAULT P0741 Torque Converter Clutch Circuit Performance
🟡 Medium
P0700
RENAULT P0700 Transmission Control System Malfunction
🚨 Critical
P0600
RENAULT P0600 Serial Communication Link Malfunction
🟡 Medium
P0507
RENAULT P0507 Idle Control System RPM Higher Than Expected
🟡 Medium
P0500
RENAULT P0500 Vehicle Speed Sensor Malfunction
🟡 Medium
P0456
RENAULT P0456 EVAP System Leak Detected (very small leak)
🟡 Medium
P0455
RENAULT P0455 EVAP System Leak Detected (large leak)
🟡 Medium
P0442
RENAULT P0442 EVAP System Leak Detected (small leak)
🟡 Medium
P0441
RENAULT P0441 Evaporative Emission System Incorrect Purge Flow
🟡 Medium
P0430
RENAULT P0430 Catalyst System Efficiency Below Threshold Bank 2
🟡 Medium
P0420
RENAULT P0420 Catalyst System Efficiency Below Threshold
🟡 Medium
P0401
RENAULT P0401 Exhaust Gas Recirculation Flow Insufficient
🟡 Medium
P0400
RENAULT P0400 Exhaust Gas Recirculation Flow Malfunction
🟡 Medium
P0340
RENAULT P0340 Camshaft Position Sensor Circuit Malfunction
🟡 Medium
P0335
RENAULT P0335 Crankshaft Position Sensor A Circuit Malfunction
🔴 High
P0325
RENAULT P0325 Knock Sensor 1 Circuit Malfunction
🟡 Medium
P0304
RENAULT P0304 Cylinder 4 Misfire Detected
🟡 Medium
P0303
RENAULT P0303 Cylinder 3 Misfire Detected
🟡 Medium
P0302
RENAULT P0302 Cylinder 2 Misfire Detected
🟡 Medium
P0301
RENAULT P0301 Cylinder 1 Misfire Detected
🔴 High
P0300
RENAULT P0300 Random/Multiple Cylinder Misfire Detected
🚨 Critical
P0299
RENAULT P0299 Turbocharger Underboost Condition
🚨 Critical
P0234
RENAULT P0234 Turbocharger Overboost Condition
🚨 Critical
P0175
RENAULT P0175 System Too Rich Bank 2
🟡 Medium
P0174
RENAULT P0174 System Too Lean Bank 2
🔴 High
P0172
RENAULT P0172 System Too Rich Bank 1
🟡 Medium
P0171
RENAULT P0171 System Too Lean Bank 1
🔴 High
P0141
RENAULT P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
🟡 Medium
P0135
RENAULT P0135 O2 Sensor Heater Circuit Malfunction
🟡 Medium
P0133
RENAULT P0133 O2 Sensor Circuit Slow Response
🟡 Medium
P0130
RENAULT P0130 O2 Sensor Circuit Malfunction
🔴 High
P0128
RENAULT P0128 Coolant Thermostat Malfunction
🟡 Medium
P0113
RENAULT P0113 Intake Air Temperature Circuit High Input
🟡 Medium
P0102
RENAULT P0102 Mass Air Flow Circuit Low Input
🟡 Medium
P0101
RENAULT P0101 Mass Air Flow Sensor Circuit Range/Performance
🟡 Medium
P0088
RENAULT P0088 Fuel Rail/System Pressure - Too High
🟡 Medium
P0087
RENAULT P0087 Fuel Rail/System Pressure - Too Low
🚨 Critical
P0016
RENAULT P0016 Crankshaft Position - Camshaft Position Correlation
🚨 Critical
P0012
RENAULT P0012 A Camshaft Position Timing Over-Retarded
🟡 Medium
P0011
RENAULT P0011 A Camshaft Position Timing Over-Advanced
🟡 Medium
P0010
RENAULT P0010 A Camshaft Position Actuator Circuit
🟡 Medium
DF035
UCH / BSI: UPC Fault (Under Steering Column ECU)
🔴 High
P1337
Crankshaft Position Sensor No Signal (K4M / F4R)
🔴 High
DF198
EGR Valve Control Circuit (K9K 1.5 dCi)
🟡 Medium
P0643
Sensor Reference Voltage Circuit High (5V Rail)
🟡 Medium
P0571
Brake Switch Circuit Malfunction (Cruise Control)
🟡 Medium
DF154
EDC Injection ECU Internal Fault (K9K Diesel)
🔴 High
P0193
Fuel Rail Pressure Sensor High (K9K Common Rail)
🔴 High
DF035
RENAULT DF035 UCH Module Fault
🔴 High
DF198
RENAULT DF198 EGR Solenoid Valve
🔴 High
DF154
RENAULT DF154 Camshaft Sensor Circuit
🔴 High
P1337
RENAULT P1337 Crankshaft Sensor Circuit
🔴 High
P0090
RENAULT P0090 Fuel Pressure Regulator
🔴 High
P0420
RENAULT P0420 Catalytic Converter Efficiency
🔴 High
P0102
RENAULT P0102 MAF Circuit Low
🔴 High
DF046
RENAULT DF046 Battery Voltage
🔴 High
DF091
RENAULT DF091 Speed Sensor
🔴 High
DF116
RENAULT DF116 Upstream O2 Sensor
🔴 High
P0032
RENAULT P0032 HO2S Heater Control Circuit High (Bank 1 Sensor 1)
🔴 High
P0037
RENAULT P0037 HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
🟢 Low
P0051
RENAULT P0051 HO2S Heater Control Circuit Low (Bank 2 Sensor 1)
🟢 Low
P0057
RENAULT P0057 HO2S Heater Control Circuit Low (Bank 2 Sensor 2)
🟡 Medium
P0058
RENAULT P0058 HO2S Heater Control Circuit High (Bank 2 Sensor 2)
🚨 Critical
P0103
RENAULT P0103 Mass or Volume Air Flow Circuit High Input
🚨 Critical
P0107
RENAULT P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
🟢 Low
P0108
RENAULT P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input
🟡 Medium
P0112
RENAULT P0112 Intake Air Temperature Circuit Low Input
🟢 Low
P0117
RENAULT P0117 Engine Coolant Temperature Circuit Low Input
🟡 Medium
P0118
RENAULT P0118 Engine Coolant Temperature Circuit High Input
🟢 Low
P0122
RENAULT P0122 Throttle/Pedal Position Sensor/Switch A Circuit Low Input
🟢 Low
P0123
RENAULT P0123 Throttle/Pedal Position Sensor/Switch A Circuit High Input
🟢 Low
P0125
RENAULT P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control
🔴 High
P0131
RENAULT P0131 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
🟡 Medium
P0132
RENAULT P0132 O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)
🔴 High
P0134
RENAULT P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
🟢 Low
P0137
RENAULT P0137 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)
🟢 Low
P0138
RENAULT P0138 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
🚨 Critical
P0151
RENAULT P0151 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1)
🚨 Critical
P0152
RENAULT P0152 O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)
🔴 High
P0157
RENAULT P0157 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2)
🔴 High
P0158
RENAULT P0158 O2 Sensor Circuit High Voltage (Bank 2 Sensor 2)
🟡 Medium
P0200
RENAULT P0200 Injector Circuit Malfunction
🟡 Medium
P0231
RENAULT P0231 Fuel Pump Secondary Circuit Low
🟡 Medium
P0232
RENAULT P0232 Fuel Pump Secondary Circuit High
🟢 Low
P0327
RENAULT P0327 Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)
🔴 High
P0328
RENAULT P0328 Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)
🚨 Critical
P0332
RENAULT P0332 Knock Sensor 2 Circuit Low Input (Bank 2)
🟢 Low
P0333
RENAULT P0333 Knock Sensor 2 Circuit High Input (Bank 2)
🟡 Medium
P0440
RENAULT P0440 Evaporative Emission Control System Malfunction
🟢 Low
P0443
RENAULT P0443 Evaporative Emission System Purge Control Valve Circuit
🚨 Critical
P0446
RENAULT P0446 Evaporative Emission System Vent Control Circuit Malfunction
🚨 Critical
P0451
RENAULT P0451 Evaporative Emission System Pressure Sensor Range/Performance
🟢 Low
P0452
RENAULT P0452 Evaporative Emission System Pressure Sensor Low Input
🟢 Low
P0453
RENAULT P0453 Evaporative Emission System Pressure Sensor High Input
🚨 Critical
P0462
RENAULT P0462 Fuel Level Sensor Circuit Low Input
🟡 Medium
P0463
RENAULT P0463 Fuel Level Sensor Circuit High Input
🚨 Critical
P0502
RENAULT P0502 Vehicle Speed Sensor Circuit Low Input
🚨 Critical
P0503
RENAULT P0503 Vehicle Speed Sensor Intermittent/Erratic/High
🚨 Critical
P0505
RENAULT P0505 Idle Control System Malfunction
🔴 High
P0506
RENAULT P0506 Idle Control System RPM Lower Than Expected
🟡 Medium
P0562
RENAULT P0562 System Voltage Low
🚨 Critical
P0563
RENAULT P0563 System Voltage High
🟡 Medium
P0601
RENAULT P0601 Internal Control Module Memory Check Sum Error
🔴 High
P0603
RENAULT P0603 Internal Control Module Keep Alive Memory (KAM) Error
🟡 Medium
P0604
RENAULT P0604 Internal Control Module Random Access Memory (RAM) Error
🔴 High
P0605
RENAULT P0605 Internal Control Module Read Only Memory (ROM) Error
🟡 Medium
P0606
RENAULT P0606 ECM/PCM Processor Fault
🟡 Medium
P0705
RENAULT P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input)
🚨 Critical
P0706
RENAULT P0706 Transmission Range Sensor Circuit Range/Performance
🚨 Critical
P0715
RENAULT P0715 Input/Turbine Speed Sensor Circuit Malfunction
🚨 Critical