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P1506 Diagnostic Trouble Code Discussion for March 2007

Idle Air Control System RPM Higher Than Expected


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Trouble Ticket Help Requests for DTC P1506
Help Request Posted
2001 Ford Escape XLS 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FMYU0416K
P1506: idle air control overspeed error. RPM Always at 1250 at idle.Disconnected IAC rpm stayed same.Istalled new IAC RPM still the same.Cleared codes and then disconnected battery.Started engine idle still comes down to about 1200.Desired is 700 to 800.I smoke tested intake plenume and did not get a...
March 12, 2007
2001 Ford Escape XLS 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FMYU0416K
P1506: idle air control overspeed error. RPM Always at 1250 at idle.Disconnected IAC rpm stayed same.Istalled new IAC RPM still the same.Cleared codes and then disconnected battery.Started engine idle still comes down to about 1200.Desired is 700 to 800.I smoke tested intake plenume and did not get a...
March 16, 2007
1996 Mercury Grand Marquis GS 4.6L High Idle VIN: 2ME1M75W7T
P1506: Idle error code. ... has a hard start and poor milage,also the SES light is on with a P1506 idle speed error. In closed loop at an idle this car runs a [...],and both the LT FT on both banks are at -3%.with the Fuel trim readings like that Im pretty sure there is no air leaks...
March 20, 2007
2000 Ford Escort LX 2.0L Poor Idle Quality, MIL Lamp on VIN: 3FAFP13P5Y
P1506: iac overspeed. we have had 2 escorts come in after other repairs . we cleared the codes and reset kam. after 3 or 4 days the ce light comes on and the 1506 iac overspeed code is set. we tried a new iac on one of the cars that did not fix the problem. we checked for tsb's . n...
March 28, 2007
2001 Ford Escape XLS 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FMYU0416K
P1506: idle air control overspeed error. RPM Always at 1250 at idle.Disconnected IAC rpm stayed same.Istalled new IAC RPM still the same.Cleared codes and then disconnected battery.Started engine idle still comes down to about 1200.Desired is 700 to 800.I smoke tested intake plenume and did not get a...
March 12, 2007
2001 Ford Escape XLS 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FMYU0416K
P1506: idle air control overspeed error. RPM Always at 1250 at idle.Disconnected IAC rpm stayed same.Istalled new IAC RPM still the same.Cleared codes and then disconnected battery.Started engine idle still comes down to about 1200.Desired is 700 to 800.I smoke tested intake plenume and did not get a...
March 16, 2007
1996 Mercury Grand Marquis GS 4.6L High Idle VIN: 2ME1M75W7T
P1506: Idle error code. ... has a hard start and poor milage,also the SES light is on with a P1506 idle speed error. In closed loop at an idle this car runs a [...],and both the LT FT on both banks are at -3%.with the Fuel trim readings like that Im pretty sure there is no air leaks...
March 20, 2007
2000 Ford Escort LX 2.0L Poor Idle Quality, MIL Lamp on VIN: 3FAFP13P5Y
P1506: iac overspeed. we have had 2 escorts come in after other repairs . we cleared the codes and reset kam. after 3 or 4 days the ce light comes on and the 1506 iac overspeed code is set. we tried a new iac on one of the cars that did not fix the problem. we checked for tsb's . n...
March 28, 2007