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Posts Tagged: P0505

P0505, P0506, hard start, rough idle

Fix P0505, P0506, hard start, rough idle on Ford vehicles Fix P0505, P0506, hard start, rough idle Ford has issued a service #12-7-4 to address trouble codes P0505, P0506, hard start, rough idle on the vehicles listed below. The vehicles may also store enhanced trouble codes P2111 and P2112 after the keep alive memory has been cleared, the battery has been disconnected or the vehicle has a dead battery. On vehicles with over 10,000 miles the problems may be caused by sludge buildup in the electronic throttle body. That causes … Read More

P0505, P0506, Idle fluctuation Ford

Idle fluctuates on Ford and trouble codes P0505 or P0506 Ford has issued a service bulletin #12-7-4 to address a P0505, P0506, Idle fluctuation problem on the vehicles listed below. The problem may exhibit P0505, P0506, with or without idle fluctuation and hard starts. In addition, the vehicles may also have P2111 and P2112 codes stored after the keep alive memory has been cleared, battery has been disconnected, or the vehicle had a dead battery. Ford has determined that the problem is caused by carbon buildup in the electronic throttle … Read More

P0505 P1505 P1129 surging idle CRV

Fix code P0505 P1505 P1129 surging idle Honda CRV If you have P0505 P1505 P1129 surging idle Honda CRV  you may have a bum idle air control valve (IAC). Here’s how to check. First, make sure the coolant level is full and that the cooling line running to the IAC is hot. If the line isn’t hot but the engine is, the line is blocked. Clear it before proceeding. Next, cover the throttle body while the engine is running. The engine should stall. If it doesn’t, you have a vacuum leak … Read More


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