MIL/SES, DTCs P060E, P1516, P2135 and/or P2138 with Reduced Engine Power (Test and Charge Battery)

Some customers may comment on an MIL/SES light Illuminated with the" Reduced Engine Power" message or indicator displayed. A technician may find two or more of the following DTCs stored in the ECM:

A battery voltage drop during the cranking cycle may cause the codes to set and place the vehicle into the reduce engine power mode.

Test and charge the battery using the steps below.

Important: A low voltage condition may cause at least two of the following DTCs to set.

•	P060E : Control Module Throttle Position (TP) System Performance

•	P1516 : Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

•	P2135 : Throttle Position (TP) Sensor 1-2 Correlation

•	P2138 : Accelerator Pedal Position (APP) Sensor 1-2 Correlation

1. Perform a Diagnostic System Check. Refer to Diagnostic System Check - Vehicle in SI.
2. Check for DTCs and review the Freeze Frame/Failure Records to determine if sufficient ignition voltage was present when the DTC set.

•	If the ignition voltage was low, then check for a possible battery drain. Refer to Battery Electrical Drain/Parasitic Load Test.

•	If the ignition voltage was sufficient when the code set, proceed with normal SI diagnosis for the code(s) set.

3. Test and recharge the battery using Bulletin 02-06-03-009 or latest version on "Battery Charging Tips'.
4. Clear all DTCs.

For vehicles repaired under warranty, use: