Details On DTCs
WARNING: This page is about a different variant/trim than selected.
DTC P3498:00 OR P349B:00 (PCM, SKYACTIV-G, US) DETECTION CONDITION AND POSSIBLE CAUSE
| Description |
Cylinder deactivation control system:
- P3498:00: No. 1 cylinder valve is stuck closed
- P349B:00: No. 4 cylinder valve is stuck closed
|
| Detection condition |
Determination conditions |
- The crankshaft fluctuation rate exceeds the specified value for every 200 rotations of the crankshaft after recovery from cylinder deactivation control.
|
| Preconditions |
- Battery voltage: 9-18 V
- Engine speed: 500-6, 500 rpm
- Engine coolant temperature: 20 °C {68 °F} or more
- Fuel-cut control not implemented
- Crankshaft installation tolerance learning completed
- Engine condition is stabilized (not directly after gear change)
|
| Malfunction determination period |
- 200 rotations of crankshaft (misfire which may damage catalytic converter)
|
| Drive cycle |
|
| Self test type |
|
| Sensor used |
- CKP sensor
- MAF sensor
- MAP sensor
|
| Fail-safe function |
- Limits intake air amount
- Implement fuel-cut control (If cylinder is filled with fuel when valve is stuck closed, fuel-cut on No. 1 or No. 4 cylinder is performed because engine could be damaged at compression stroke).
|
| Vehicle status when DTCs are output |
- Possibility of engine damage occurring.
- Rough idling, poor acceleration, stalling
|
| Possible cause |
- Improper operation of ignition system
- Spark plug malfunction
- Ignition coil related wiring harness or connector malfunction
- Ignition coil malfunction
- Fuel injector malfunction
- Improper operation of fuel injector
- Fuel injector related wiring harness malfunction
- OCV for No. 1 cylinder deactivation malfunction
- Poor operation of OCV for No. 1 cylinder deactivation
- Related wiring harness malfunction
- OCV for No. 4 cylinder deactivation malfunction
- Poor operation of OCV for No. 4 cylinder deactivation
- Related wiring harness malfunction
- Switchable HLA malfunction
- Engine oil solenoid valve malfunction
- Poor operation of engine oil solenoid valve
- Related wiring harness malfunction
- CKP sensor signal malfunction
- ECT sensor No. 1 signal malfunction
- MAF sensor signal malfunction
- MAP sensor signal malfunction
- IAT sensor No. 1 signal malfunction
- APP sensor signal malfunction
- TP sensor signal malfunction
- VSS signal malfunction
- Related connector or terminals malfunction
- Related wiring harness malfunction
- Air leakage from intake air system (between intake manifold and cylinder head)
- Poor drive belt assembly or adhesion of oil
- Drive belt auto tensioner malfunction
- Engine malfunction
- Insufficient engine compression
- Engine coolant leakage to combustion chamber
- Internal engine wear, damage
- No. 1 or No. 4 cylinder intake/exhaust valve (stuck closed) malfunction
|