Do not overlook other codes that are paired along with P0420.
#FORD DIAGNOSTIC CODE CODE#
Secondary Air Injection system Inoperative (left side).If you get a check engine light or wrench symbol on your Ford 6.4 Powerstroke Diesel Engine, use a code reader to pull the code and look it up on this list to see what it is. Ford Code P0420 Common Diagnosis Mistakes. HO2S circuit indicates system rich (left HO2S).
HO2S circuit Indicates system loan (left HO2S). When a diagnostic trouble code is reported on the analog voltmeter for a functional test, it will represent itself as a pulsing or sweeping movement of the voltmeter’s needle across the dial face. Secondary Air Injection Bypass (AIRS) solenoid circuit failure.ĮGR Vacuum Regulator (EVR) circuit failure. Accessing Ford OBD1 Trouble Codes Using Analog Voltmeter. Secondary -Air Injection Diverter (AIRD) solenoid circuit failure. Park/Neutral Position (PNP) switch circuit open - A/C on during Self-Test.īrief WOT not sensed during Self-Test / Operator error. IAT indicated 123 C (254 F) I circuit grounded. IAT Indicated -4000 (-40"F) /circuit open.ĮCT Indicated 123 C (254 F) / circuit grounded.
#FORD DIAGNOSTIC CODE MANUAL#
See also: Ford Diagnostic Trouble Codes Ford Owners Manual Sensors Fault Code Description 0100 0105 The on-board computer of the vehicle reports a breakdown or incorrect signal from the air flow control device.
Secondary Air Injection not bypassed during Self-Test.ĮCT Indicated -40 C (-40 F) /circuit open. These Ford fault codes are applicable to Ford Kuga and also: Ford Fusion, Focus and Mondeo. Secondary Air Injection upstream during Self-Test. The following is a partial listing of common Ford specific 'P1' enhanced OBD II fault codes: Ford Trouble Code List P1000-P1299. Secondary Air Injection system Inoperative (right side). For vehicle specific diagnostic charts and vehicle specific repair information, refer to a service manual, or get a subscription to the Ford Service Information website. HO2S circuit indicates system rich (right HO2S). HO2S circuit indicates system lean (right HO2S). Insufficient input from the Vehicle Speed Sensor (VSS). IDM circuit failure/ SPOUT circuit grounded.ĮCT out of Self-Test range MAP/BARO out of Self-Test range. Data Link Connector (DLC)(Located Under hood)Īnalog Voltmeter Connection Ford Codes 11Ĭannot control rpm during KOER Sell-Test high rpm check.Ĭannot control rpm during KOER Self-Test low rpm check.