Chevrolet Blazer Fault Codes
You can find common Chevrolet Blazer fault codes on this page that when clicked take you to a detailed description.
You can also type in the fault code you are getting below to find a more detailed description.
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Search Chevrolet Blazer Codes
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Chevrolet Blazer Recalls
When a car manufacturer detects a problem with a model they put out a recall notice and more often than not offer to fix the problem free of charge.
You can check to see if your Chevrolet Blazer has any recall notices on our sister site AutoRecalls.co, sorted by model year.View Chevrolet Blazer Recalls »
Common Blazer Fault Codes
These are the most common Blazer fault codes that people are searching for.
Evaporative Emission Control System MalfunctionLearn More Fixes
Random/Multiple Cylinder Misfire DetectedLearn More Fixes
Catalyst System Efficiency Below Threshold (Bank 1)Learn More Fixes
Evaporative Emission Control System Leak DetectedLearn More Fixes
System Too Lean (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
System Too Lean (Bank 2)Learn More Fixes
Cylinder 6 Misfire DetectedLearn More Fixes
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)Learn More Fixes
Shift Solenoid A Electrical/1-2 Shift Solenoid Circuit ElectricalLearn More
Secondary Air Injection System MalfunctionLearn More
Evaporative Emission System High Purge FlowLearn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)Learn More
Idle Control System RPM lower Than ExpectedLearn More
Mass or Volume Air flow Circuit Range/Performance ProblemLearn More Fixes
Idle Control System RPM higher Than ExpectedLearn More Fixes
Injector Circuit MalfunctionLearn More
Pressure Control Solenoid B Stuck OnLearn More
System Too Rich (Bank 2)Learn More Fixes
Evaporative Emission Control System Incorrect Purge flowLearn More Fixes
Evaporative Emissions System Small Leak DetectedLearn More Fixes
Knock Sensor 2 Circuit Low Input (Bank 2)Learn More Fixes
System Gross Leak Evaporative EmissionLearn More Fixes
Transmission Fluid Pressure Manual Valve Position SwitchLearn More
SGC (Cam Position) Sensor Circuit Malfunction/ Crankshaft Position - Camshaft Position CorrelationLearn More
Theft Deterrent Fuel Enable Signal Not Received/ B+ Supply To VCRM A/C Circuit MalfunctionLearn More
TCC PWM Solenoid Circuit Electrical/ Transmission Transfer Case Contact Plate 'D' Short Circuit To BatteryLearn More
Theft Deterrent Start Enable Signal Not Correct/ Main Relay Malfunction (Power Hold)Learn More
IAT - B Circuit Malfunction/ Exhaust Gas Recirculation Closed Position PerformanceLearn More
Misfire Detected - Rough Road Data Not AvailableLearn More
4X4 Initialization FailureLearn More
HO2S Insufficient Switching Sensor 1Learn More
SCP (J1850) Invalid or Missing Data for Vehicle SpeedLearn More
Throttle/Pedal Position Sensor/Switch A / B Voltage CorrelationLearn More Fixes
Evaporative Emission Control System Vent Control Circuit MalfunctionLearn More Fixes
Dual Battery Control Module PerformanceLearn More
Cylinder 1 Misfire DetectedLearn More Fixes
Evaporative Emission Control System Vent Valve/Solenoid Circuit MalfunctionLearn More Fixes
Fuel Pressure Regulator PerformanceLearn More Fixes
SCP (J1850) Invalid or Missing Data for Primary IdLearn More
Lost Communication With Throttle Actuator Control ModuleLearn More
Control Module Communication Bus "A" OffLearn More Fixes
Charging System Voltage Too LowLearn More
IMRC Input Error (Bank 1)Learn More
MAF Sensor Out Of Self Test Range./KOER Not Able To Complete KOER AbortedLearn More
IDM Input Circuit Malfunction/ Ignition Coil Control Circuit High VoltageLearn More
Maximum Adaptive & Long Term ShiftLearn More
Intake Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Retarded (Bank 1)Learn More Fixes
Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor ALearn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor BLearn More Fixes
Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2Learn More Fixes
Mass or Volume Air Flow Circuit Low Voltage InputLearn More Fixes
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance ProblemLearn More Fixes
Intake Air Temperature Circuit High InputLearn More Fixes
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)Learn More Fixes
O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)Learn More Fixes
System Too Rich (Bank 1)Learn More Fixes
Cylinder 2 Misfire DetectedLearn More Fixes
Cylinder 3 Misfire DetectedLearn More Fixes
Cylinder 4 Misfire DetectedLearn More Fixes
Cylinder 5 Misfire DetectedLearn More Fixes
Knock Sensor 1 Circuit (Bank 2 or Single Sensor)Learn More Fixes
Crankshaft Position Sensor A Circuit MalfunctionLearn More Fixes
Camshaft Position Sensor Circuit Range/PerformanceLearn More Fixes
Exhaust Gas Recirculation Flow Insufficient DetectedLearn More Fixes
Catalyst System Efficiency Below Threshold (Bank 2)Learn More Fixes
Fuel Level Sensor Circuit High InputLearn More Fixes
- Manufacturer: Chevrolet
About the Blazer
The modern version of the Blazer first came to market in 2019. Of course, there has been only a single generation released since then. To stay up to date, Chevrolet has made minor changes to the model each year since its release.
The Blazer is currently the middle of the Chevy SUV lineup. It is considered the larger version of offerings like the Chevrolet Equinox, while remaining significantly smaller than the larger models like the Chevrolet Tahoe.
Competition in the mid-size crossover class has become very tough, which means that the model rivals the likes of the Ford Edge, Honda Passport, and Hyundai Santa Fe. However, there are many more.
One of the most commonly reported issues for the Blazer is P0440. This code indicates that there is a malfunction somewhere in the evaporative emissions control (EVAP) system.
It is important for owners to look for any other codes that relate to the EVAP system before tackling this code as they can very well be the cause.
Another problem that has been reported commonly is P0300, which is logged when multiple random misfires have been detected.
Similar to the previous code, fixing this issue typically requires owners to first address any other codes that could potentially cause misfires to occur in multiple cylinders. Owners have also reported that installing new ignition coil packs is one of the best things to try first.
Another common issue that the model has faced is P0420, which indicates that the catalytic converter is likely failing.
In most cases, this will be the result of wear over mileage. However, it is also possible that this be caused by failing oxygen sensors found before and after the catalytic converter.