Full list of OBD I Diagnostic Trouble Codes for your Ford Vehicle. If your Check engine light is on you may have a serious problem. Scan your codes and follow the chart to determine what the code means. Some shops will scan your codes for free. Ford VCM2 IDS is the professional Ford Mazda diagnostic tool that will show you the trouble codes. Or do it yourself with the procedure posted below.
To read out the DTCs from the computer for diagnostic purposes, the Self Test connector is used.
Start engine and bring to normal operating temperature. If engine will not start or stalls after starting, proceed with next step.
Turn the key “OFF”, then wait ten seconds.
Activate the self test by grounding the Self-Test Input (STI) connector.
Turn the ignition key “ON”.
Record all codes received.
Turn ignition “OFF”.
IMG 1: Data Link Connector (DLC)(Located Under hood)
IMG 2: Analog Voltmeter Connection
Cannot control rpm during KOER Sell-Test high rpm check.
Cannot control rpm during KOER Self-Test low rpm check.
PIP Circuit failure.
PCM Read Only Memory (ROM) teat failed.
Rpm too low to perform H02S test.
SPOUT circuit open.
IDM circuit failure/ SPOUT circuit grounded.
Failure In PCM Internal voltage.
ECT out of Self-Test range MAP/BARO out of Self-Test range.
MAP/BARO out of Self-Test range.
TP out of Self-Test range.
IAT out of Self-Test range.
MAF out of Self-Test range.
Insufficient input from the Vehicle Speed Sensor (VSS).
EVP circuit below minimum voltage.
EVP voltage below closed limit.
EGR valve opening not detected.
EVP voltage above closed limit.
EVP circuit above maximum voltage.
HO2S circuit indicates system lean (right HO2S).
No HO2S switch detected (right HO2S).
HO2S circuit indicates system rich (right HO2S).
Secondary Air Injection system Inoperative (right side).
Secondary Air Injection upstream during Self-Test.
Secondary Air Injection not bypassed during Self-Test.
ECT Indicated -40 C (-40 F) /circuit open.
TP circuit above maximum voltage.
IAT Indicated -4000 (-40″F) /circuit open.
MAF circuit above maximum voltage.
ECT Indicated 123 C (254 F) / circuit grounded.
TP circuit below minimum voltage.
IAT indicated 123 C (254 F) I circuit grounded.
MAF circuit below minimum voltage.
Park/Neutral Position (PNP) switch circuit open – A/C on during Self-Test.
Brief WOT not sensed during Self-Test / Operator error.