Vehicle: 2011 Dodge Grand Caravan, V6-3.6L,
Problem: This vehicle was brought to the shop
for a rough running engine and the Malfunction Indicator Light
Details: The first thing the technician did
was to check for DTCs. There was only one – P054A. The DTC
description for this code is: Cold Start Exhaust Camshaft
Position Timing over advanced on Bank 1, Sensor #2.
Based on the DTC and some previously similar cases, the
Tech-Assist consultant advised the tech to performed a relative
compression test by scoping battery amperage with an amp clamp
while cranking. This test quickly pinpointed the problem – one
cylinder on bank 1 had low compression.
Confirmed Repair: The technician removed the
Bank 1 valve cover and found a worn cam lobe (See image). He
replaced camshaft and the related rocker arms. He cleared the DTC
and test drove the vehicle. The problem was fixed!