Engine Diagnostic Codes (P0XXX)
Complete list of engine diagnostic trouble codes (P0XXX). Browse powertrain codes for engine, transmission, and emission control systems.
Popular Engine Codes
Complete Engine Codes Index
Browse all available engine diagnostic trouble codes (P0XXX) organized by system:
Showing codes 8601-8700 of 12293 total codes
P21XX Engine Control System
P2198
The P2198 code indicates that the oxygen sensor detects a lean condition in t...
P2199
P2199 indicates that the oxygen sensor is reporting a lean condition,
P219A
DTC P219A indicates an imbalance in the air-fuel ratio.
P219B
DTC P219B indicates a fuel imbalance in the engine, which can lead to perform...
P219C
DTC P219C means there's an issue with the air-fuel mixture balance in your en...
P219D
The P219D code indicates an overly rich fuel mixture in the engine,
P219E
P219E indicates an air-fuel ratio imbalance detected by the ECM.
P219F
P219F indicates a problem with the fuel composition sensor's performance.
P21A0
The P21A0 code signifies a malfunction in the battery management system.
P21A1
P21A1 indicates a problem with the fuel temperature sensor circuit,
P21A2
P21A2 indicates a problem with the SCR system in your vehicle's exhaust system.
P21A3
P21A3 indicates a problem with the fuel pump control module's performance.
P21A4
DTC P21A4 indicates a problem with the quality of the Diesel Exhaust Fluid (D...
P21A5
P21A5 refers to a fuel pump control module performance issue.
P21A6
P21A6 indicates a battery energy control module fault detected in the vehicle.
P21A7
P21A7 indicates a problem with the quality of Diesel Exhaust Fluid (DEF) in y...
P21A8
P21A8 indicates that the diesel particulate filter is not functioning properl...
P21A9
P21A9 indicates a malfunction in the hybrid battery management system.
P21AA
P21AA indicates an issue with the quality of Diesel Exhaust Fluid in your veh...
P21AB
P21AB indicates a performance issue with the diesel particulate filter.
P21AC
Indicates and how to fix it is critical.
P21AD
DTC P21AD indicates a voltage sensor issue in the hybrid battery pack,
P21AE
P21AE indicates a problem with the quality of Diesel Exhaust Fluid (DEF) in y...
P21AF
P21AF indicates an issue with the quality of diesel exhaust fluid in your veh...
P21B0
P21B0 indicates a malfunction with the exhaust temperature sensor,
P21B1
The P21B1 code indicates a problem with the quality of Diesel Exhaust Fluid (...
P21B2
P21B2 indicates poor diesel exhaust fluid quality.
P21B3
The Diagnostic Trouble Code (DTC) P21B3 specifically points to an issue with ...
P21B4
P21B4 indicates a problem with the diesel exhaust fluid quality sensor.
P21B5
The P21B5 code indicates a problem with the hybrid battery temperature sensor...
P21B6
The P21B6 code indicates a problem with the quality of the Diesel Exhaust Flu...
P21B7
The P21B7 code indicates a problem with the fuel pump control module,
P21B8
P21B8 indicates an issue with the performance of the Diesel Exhaust Fluid qua...
P21B9
P21B9 indicates a fuel rail pressure sensor circuit issue.
P21BA
DTC P21BA indicates a problem with the quality of the diesel exhaust fluid in...
P21BB
The P21BB code indicates a fuel system performance issue detected by the ECM.
P21BC
P21BC refers to exhaust aftertreatment control module performance issues,
P21BD
P21BD indicates a problem with diesel exhaust fluid quality.
P21BE
DTC P21BE indicates a malfunction with the NOx sensor in the exhaust system.
P21BF
P21BF indicates a performance issue in the Diesel Exhaust Fluid system,
P21C0
P21C0 indicates a failure in the diesel particulate filter regeneration process.
P21C1
P21C1 indicates a problem with diesel exhaust fluid quality.
P21C2
P21C2 indicates a DPF efficiency issue in diesel vehicles.
P21C3
P21C3 indicates a Diesel Exhaust Fluid imbalance, affecting emissions control.
P21C4
P21C4 indicates a problem with the Diesel Particulate Filter, affecting emiss...
P21C5
P21C5 indicates a quality issue with Diesel Exhaust Fluid (DEF),
P21C6
The P21C6 code indicates a malfunction in the diesel exhaust fluid quality se...
P21C7
P21C7 indicates a malfunction in the diesel particulate filter system related...
P21C8
P21C8 indicates a turbocharger or supercharger boost control performance issue.
P21C9
P21C9 indicates a problem with the engine coolant temperature sensor.
P21CA
The P21CA code indicates an issue with the quality of diesel exhaust fluid in...
P21CB
P21CB indicates that the Diesel Exhaust Fluid (DEF) quality is poor or below ...
P21CC
P21CC indicates a problem with the quality of the diesel exhaust fluid (DEF) ...
P21CD
The P21CD code indicates a fault in the DPF regeneration process in diesel en...
P21CE
The P21CE code indicates an issue with the Diesel Particulate Filter regenera...
P21CF
P21CF indicates a malfunction with the exhaust temperature sensor circuit.
P21D0
DTC P21D0 refers to a malfunction in the exhaust gas temperature sensor circuit.
P21D1
P21D1 indicates a problem with the diesel exhaust fluid system,
P21D2
P21D2 refers to a malfunction in the Diesel Exhaust Fluid (DEF) pump control ...
P21D3
Indicates the DPF is unable to complete the regeneration cycle necessary for ...
P21D4
P21D4 indicates a problem with the diesel particulate filter, which may be cl...
P21D5
The DTC code P21D5 indicates an issue with the diesel particulate filter (DPF...
P21D6
DTC P21D6 indicates an issue with the selective catalytic reduction system re...
P21D7
P21D7 indicates a problem with the turbocharger or supercharger boost control...
P21D8
P21D8 indicates a Diesel Exhaust Fluid quality issue, often due to contaminat...
P21D9
DTC P21D9 indicates a malfunction in the exhaust gas temperature sensor circuit.
P21DA
P21DA indicates a failure in the DPF regeneration process.
P21DB
P21DB indicates a problem with the diesel particulate filter system's regener...
P21DC
P21DC indicates a problem with the turbocharger or supercharger boost control...
P21DD
The P21DD code indicates a performance issue with the turbocharger or superch...
P21DE
The P21DE code signals a problem with the quality of diesel exhaust fluid in ...
P21DF
P21DF indicates a performance issue with the Diesel Exhaust Fluid system,
P21E0
P21E0 relates to a malfunction in the hybrid battery voltage sensor.
P21E1
P21E1 indicates a malfunction in the EGR system, often related to the tempera...
P21E2
P21E2 indicates a malfunction in the exhaust temperature sensor.
P21E3
P21E3 indicates a DEF quality issue in diesel engines.
P21E4
P21E4 indicates a problem with the diesel particulate filter or engine coolin...
P21E5
P21E5 means there is a problem with the quality of the Diesel Exhaust Fluid (...
P21E6
The P21E6 code indicates a malfunction in the exhaust gas temperature sensor'...
P21E7
P21E7 indicates a problem with the fuel pressure regulator performance.
P21E8
P21E8 indicates a hybrid battery performance issue in vehicles.
P21E9
P21E9 indicates a malfunction in the vehicle's selective catalytic reduction ...
P21EA
DTC P21EA indicates a diesel particulate filter regeneration issue.
P21EB
P21EB indicates a malfunction in the exhaust temperature sensor,
P21EC
The P21EC code indicates a failure in the diesel particulate filter regenerat...
P21ED
Indicates a problem related to the Diesel Exhaust Fluid (DEF) system,
P21EE
DTC P21EE indicates a malfunction in the exhaust aftertreatment system,
P21EF
DTC P21EF indicates an issue with the Diesel Exhaust Fluid quality sensor.
P21F0
P21F0 indicates a problem with the quality of the Diesel Exhaust Fluid (DEF) ...
P21F1
P21F1 signifies a diesel exhaust fluid quality issue in your vehicle's SCR sy...
P21F2
P21F2 indicates a coolant temperature sensor issue affecting engine performance.
P21F3
P21F3 indicates a performance issue with the exhaust aftertreatment control m...
P21F4
DTC P21F4 indicates a problem with the battery energy control module in hybri...
P21F5
The P21F5 code indicates a malfunction in the hybrid battery energy control m...
P21F6
P21F6 indicates a problem with the diesel particulate filter, particularly in...
P21F7
P21F7 signifies a DEF quality issue or malfunction in the aftertreatment system.
P21F8
P21F8 indicates a Diesel Exhaust Fluid quality issue, typically seen in 2015-...
P21F9
P21F9 indicates a problem with the efficiency of the Diesel Particulate Filte...
P21FA
P21FA indicates a quality issue with the Diesel Exhaust Fluid in your vehicle.
P21FB
P21FB indicates a fuel pressure regulator performance issue.
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