Cold Start P1400 - keywords 6.2 DTC emission engine idle ignition L92 MIL RPM SES startup

This PI was superseded to was superseded to include a clean date in which vehicles already had the updated calibration. Please discard

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

A dealer may encounter a customer concern of SES light and DTC P1400 after a cold start.

DTC P1400 may be setting on low mileage vehicles. Per SI diagnostics P1400 can be induced by any loading of the engine that lowers engine RPM.

There has been a new calibration released to address DTC P1400. Reprogram the ECM and evaluate repairs.

The P1400 calibration was put into production so only the vehicles built before a specific date will benefit from this update.

For Arlington built vehicles (Use 11th digit of VIN number to identify plant of origin, on Arlington built vehicles the 11th digit is an R) the calibration is only necessary for vehicles built before 12/12/2007.

All other vehicles (plants) referenced in this PI received the calibration on 11/30/2007.

If a dealer was to encounter a P1400 after a updated calibration has been installed, complete the current SI diagnostic, make repairs as necessary, and complete a Field Product Report using the newest version of bulletin number 02-00-89-002.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.