Four problems related to check engine light on have been reported for the 2006 Ford Ranger. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Ford Ranger based on all problems reported for the 2006 Ranger.
Sitting at a stop light engine started running rough the check engine light was flashing. I took off and it was not running well and couldn't get speed going until around a 1/4 mile down the road. It has happened several times always at idle speeds, once I get it moving and go up to highway speeds the problem seems to go away but the check engine light stays on. I have had the code read and the likely solution is to replace cylinder head assembly. The code was p0316 which indicates too many misfires after startup and code p0304 which is cylinder number 4 misfire. Needless to say I had drivers behind me honking and flashing lights but the truck just wouldn't go over about 5 mph until I was down the road a bit. The first time it happened in April of 2018 and it has intermittently done it several times since then with the latest time being yesterday 11/5/18. I have done some research and found out that there are known issues with the heads on this Ford Ranger. I have contacted them about the issue and seemed to have not gotten anywhere with it.
Rough idle noticed while stopped at an intersection. Catastrophic misfire upon acceleration through an intersection. Truck was only able to "limp" 5 or less miles per hour. Check engine light had been turning off and on however diagnostics showed misfire for unknown reasons. Spark plugs and wires had been replaced twice within a year as well. Defected head manufactured by Ford.
2006 Ford Ranger. Consumer writes in regards to vehicle defective cylinder heads. The consumer stated according to Fords technical service bulletin 05-26-3 the engines were built at the factory with defective heads. If the check engine light illuminated, the heads needed to be replaced, as it was explained to him by a mechanic at a Ford dealership. The consumer stated it appeared to be defective materials in the heads, which required the heads to be removed and scrapped, along with the head gaskets. The heads appeared to be made of soft iron, where the base metal was perhaps not heat treated. The estimates for the repair of the engine, were between $3,000-$6,000 depending on what was needed to fix the problem.
The contact owns a 2006 Ford Ranger. The contact stated that the engine stalled intermittently and the check engine light continuously illuminates on the instrument panel. The failures were caused by the head in the engine. The dealer is aware of the failure, but will not assist. The failure mileage was 88,000.
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