Search OBD-II codes
Filter by family, system, severity, engine, fuel or manufacturer. Every row links to the full diagnostic page with causes, safety advice, checks and a guided workflow.
208 codes found
Showing 76–100 of 208
-
Turbocharger underboost condition
The engine is not reaching the commanded boost pressure.
-
Random / multiple cylinder misfire detected
The ECM detected misfires in multiple cylinders, usually from a shared ignition, fuel or air issue.
-
Cylinder 1 misfire detected
Cylinder 1 is not firing correctly. Swapping parts isolates the cause.
-
Cylinder 2 misfire detected
Cylinder 2 is misfiring. Isolate by swapping parts.
-
Cylinder 3 misfire detected
Cylinder 3 is misfiring. Isolate by swapping parts.
-
Cylinder 4 misfire detected
Cylinder 4 is misfiring. Isolate by swapping parts.
-
Cylinder 5 misfire detected
Cylinder 5 is misfiring.
-
Cylinder 6 misfire detected
Cylinder 6 is misfiring.
-
Cylinder 7 misfire detected
Cylinder 7 is misfiring.
-
Cylinder 8 misfire detected
Cylinder 8 is misfiring.
-
Misfire detected on startup
A misfire occurred during the first 1000 revolutions.
-
Knock sensor circuit malfunction — Bank 1
The knock sensor circuit is faulty; the ECM may retard timing to protect the engine.
-
Knock sensor 1 circuit low input
The knock sensor circuit reads too low.
-
Knock sensor 1 circuit high input
The knock sensor circuit reads too high.
-
Crankshaft position sensor circuit malfunction
The ECM has no valid crankshaft position signal, which can prevent starting.
-
Crankshaft position sensor range / performance problem
The crankshaft signal is present but out of the expected range or pattern.
-
Camshaft position sensor circuit malfunction
The camshaft position signal is missing, from a sensor fault or skipped timing.
-
Camshaft position sensor range / performance problem
The camshaft signal is out of pattern relative to the crankshaft.
-
Camshaft position sensor circuit — Bank 2
The bank 2 camshaft sensor circuit has a fault.
-
Ignition coil A primary/secondary circuit malfunction
The ignition coil primary circuit has an electrical fault.
-
Ignition coil B primary/secondary circuit malfunction
The ignition coil B circuit has an electrical fault.
-
Ignition coil C primary/secondary circuit malfunction
The ignition coil C circuit has an electrical fault.
-
Glow plug / heater circuit malfunction
The diesel glow plug circuit has a fault.
-
EGR flow malfunction
The EGR flow is not as expected.
-
EGR flow insufficient
Not enough exhaust gas is being recirculated, often due to carbon buildup.