DTC Troubleshooting: P1607 (0-2)

DTC P1607 (0-2):  Malfunction in ECM/PCM Internal Circuit

1.Reset the ECM/PCM.

2.Turn the ignition switch ON (II).

3.Start the engine.

4.Wait 40 seconds.

Is DTC P1607 indicated?


YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original  ECM/ PCM.n


NO - Intermittent failure, system is OK at this time. A low battery can cause this problem. Ask the customer if there has been any recent trouble starting the engine.n