P0300 on Dodge

The electronic throttle body fails from carbon buildup and TPS sensor malfunction. Causes rough idle, stalling, hesitation, and check engine light. Common across all 2.4L World Engine applications.

HEMI engines with Multi-Displacement System (MDS) can develop a ticking noise from the hydraulic lifters. This is often related to the MDS deactivation system. Some owners disable MDS via tuner to eliminate the issue.

The 3.6L Pentastar V6 engine can develop a ticking noise from worn rocker arms. Unlike the HEMI MDS tick, this is caused by the roller follower rocker arms wearing out prematurely. The issue typically appears between 50,000-100,000 miles and is more common on 2011-2013 engines but can occur on later models.

HEMI engines with Multi-Displacement System (MDS) can develop a ticking noise from the MDS lifters. This tick is most noticeable at idle and during light acceleration. While often not causing immediate damage, it can indicate lifter wear that may eventually require attention.

The 3.6L Pentastar V6 can develop a ticking noise often related to the rocker arms or hydraulic lifters. This is common on engines with higher mileage or irregular oil change intervals. Some early Pentastar engines had rocker arm design issues that were later updated.

HEMI engines with Multi-Displacement System (MDS) can develop a ticking noise from the MDS lifters. This is most noticeable at idle and during light acceleration. While often not immediately harmful, it can indicate lifter wear.

The 3.3L and 3.8L V6 engines suffer from water pump failures, thermostat sticking, and radiator fan relay failures. Overheating can cause head gasket failure. Fan relay is the most common single failure point. Same cooling system as Chrysler Town & Country.

The 3.6L Pentastar V6 in later Grand Caravans develops oil sludge and varnish buildup, particularly when oil changes are not performed at 5,000-mile intervals or when conventional oil is used. Sludge clogs the oil passages feeding the variable valve timing (VVT) system, causing camshaft actuator codes and rough running. The Pentastar is sensitive to oil quality and change intervals due to its VVT system and tight oil passages.

The 2.7L DOHC V6 engine is one of the most notoriously unreliable engines Chrysler ever produced. Inadequate oil drain-back passages in the cylinder heads allow oil to sit and cook at operating temperature, forming thick sludge deposits that clog oil passages and starve the engine of lubrication. This leads to catastrophic engine seizure, often before 100,000 miles even with proper oil change intervals. The water pump is driven by the timing chain and leaks coolant into the oil, accelerating sludge formation. Multiple class-action lawsuits were filed over this engine.

Debris accumulates in cylinder head coolant port at primary thermostat housing, blocking coolant flow and causing overheating. Typically occurs around 78,000 miles. Can cause head gasket failure or engine damage if not addressed.

2014 models with 2.4L engine notorious for head gasket failures around 100,000 miles. Fails due to overheating issues and possible manufacturing defects in gasket material or cylinder head warping. Plastic thermostat housing contributes to overheating.

The 5.9L Magnum V8 intake manifold plenum gasket is a well-known failure point. The factory gasket degrades and allows engine oil to be drawn into the intake, causing oil consumption, misfires, and loss of power. The plenum pan sits atop the intake manifold and the gasket between them deteriorates over time. This is considered an inherent design flaw in all Magnum V8 engines (5.2L and 5.9L). Hughes Engines offers a permanent fix with a billet aluminum plenum plate that eliminates the gasket entirely.

The 2.2L and 2.5L Chrysler K-car engines in the Shadow are prone to head gasket failure, especially after overheating episodes. The cast iron block and aluminum head expand at different rates, causing the head gasket to lose its seal over time. The 2.5L is more prone than the 2.2L due to higher combustion pressures. Coolant leaking externally at the rear of the head or internally causing white exhaust smoke are the primary symptoms. The turbo 2.2L variants are particularly susceptible due to higher cylinder pressures. These engines use a composite head gasket that has been superseded by improved designs.

The Dodge Spirit shares the same 2.2L and 2.5L K-car engines as the Shadow and suffers from the identical head gasket failure pattern. The bimetallic construction (cast iron block, aluminum head) creates differential thermal expansion that breaks down the composite head gasket seal. The 2.5L is more commonly affected due to higher combustion pressures. The Spirit R/T model with the 2.2L turbo is particularly susceptible due to boost pressure stressing the gasket. Overheating from any cause (stuck thermostat, failed fan, low coolant) often triggers immediate head gasket failure on these engines.

The Stealth's Mitsubishi 6G72 3.0L V6 (both SOHC and DOHC twin-turbo) uses a timing belt that must be replaced on schedule. The twin-turbo DOHC version is an interference engine. The balance shaft belt can also break and get tangled in the timing belt, causing catastrophic engine damage.

The same notorious 2.7L DOHC V6 sludge issue that plagues the Intrepid affects the 2nd generation Stratus. Inadequate oil drain-back passages in the cylinder heads allow oil to cook and form thick sludge deposits that clog passages and starve bearings of oil. The water pump is chain-driven inside the engine and when it leaks, coolant mixes with oil, dramatically accelerating sludge formation. Engine seizure often occurs between 60,000-100,000 miles. This engine earned a reputation as one of the worst ever produced by Chrysler.

The 2.4L DOHC 4-cylinder engine (used across both Stratus generations) is prone to head gasket failure, particularly when overheating occurs. The aluminum cylinder head warps more easily than cast iron, and once warped, the head gasket cannot maintain a proper seal. Coolant mixing with oil or exhaust gases entering the cooling system are the primary failure modes. While more reliable than the 2.7L V6, the 2.4L still requires careful cooling system maintenance. The factory composite head gasket has been superseded by improved MLS (multi-layer steel) designs.

Composite head gasket design inadequate for V10 heat output. Gen 2 (1996+) upgraded to MLS gasket which resolved the issue. Gen 1 owners should upgrade to MLS design during any head work.

Oil starvation during sustained high-speed cornering causes rod bearing failure and catastrophic engine damage. Oil surges away from pickup during hard lateral loading. Gen 3 (2003-2006) more prone than Gen 4 (2008-2010). Primary risk during track use.