DTC P1294: TARGET IDLE NOT REACHED Dodge Ram Wagon B1500

Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For circuit identification and wiring diagram, see RAM VAN & RAM WAGON wiring diagram in WIRING DIAGRAMS article.

Note. DTC P1294: TARGET IDLE NOT REACHED is monitored with engine idling, transmission in Drive (A/T), and no MAP or TP sensor DTCs present. DTC may be stored in Powertrain Control Module (PCM) when PCM senses engine speed more than 200 RPM above or 100 RPM below target idle speed for 14 seconds. Three separate failures are required to set a bad trip. Two bad trips are required to set DTC. Possible causes are: vacuum leak, defective throttle body, throttle plate or linkage improperly positioned, defective connectors or defective wiring.

1. Turn ignition on, with engine off. Using scan tool, read DTCs. If DTC SPECIFIC GOOD TRIP COUNTER is displayed and displayed count is "0", go to step 4). If DTC SPECIFIC GOOD TRIP COUNTER is not displayed or displayed count is not "0", go to next step.
2. Determine if DTC matches FREEZE FRAME data. If DTC is equal to FREEZE FRAME data, go to next step. If DTC is not equal to FREEZE FRAME DTC, repair DTC using FREEZE FRAME data. Perform TEST VER-5A.
3. Using scan tool, read FREEZE FRAME data. Road test vehicle and try to duplicate conditions in FREEZE FRAME data. If DTC SPECIFIC GOOD TRIP COUNTER is displayed and displayed count is "0", go to next step. If DTC SPECIFIC GOOD TRIP COUNTER is not displayed or displayed count is not "0", conditions required to set DTC are not present at this time. Operate vehicle for one DTC SPECIFIC GOOD TRIP, and then erase DTCs.
4. Start engine and allow it to idle for 60 seconds. Using scan tool, go to SYSTEM TESTS and select IAC WIGGLE TEST. If idle speed raises and lowers during wiggle test, go to next step. If idle speed does not raise and lower during wiggle test, perform DTC P0505: IAC MOTOR CIRCUIT test. NOTE: The following step is invalid if engine has any vacuum leaks.
5. Ensure engine is still idling. Check engine, brake booster and vacuum hoses for leaks. Ensure PCV valve is operating properly. Repair vacuum leaks or replace PCV valve as necessary. Perform TEST VER-5A. If PCV valve is okay and no vacuum leaks exist, go to next step.
6. Turn engine off. Turn ignition on, with engine off. Ensure throttle plate is fully closed against stop. Check throttle plate and linkage for binding. Repair throttle plate and linkage as necessary. Perform TEST VER-5A. If throttle plate and linkage are okay, go to next step.
7. Turn ignition off. Disconnect PCV valve from intake manifold. Cap vacuum port at intake manifold. Disconnect idle purge hose from throttle body. Install Orifice Tool (6714) on idle purge hose from throttle body. Start engine and allow it to reach normal operating temperature. Using scan tool, actuate MIN AIRFLOW. If engine speed is less than 550 RPM, go to next step. If engine speed is 550 RPM or more, replace throttle body. Perform TEST VER-5A. WARNING: Clean throttle body in well ventilated area and wear rubber gloves.
8. Remove throttle body. While holding throttle open, spray entire throttle body bore with carburetor/throttle body cleaner. Using soft scuff pad, clean throttle body bore and throttle plate. Using compressed air, dry throttle body. Install throttle body. Start engine and allow it to idle. Using scan tool, actuate MIN AIRFLOW. If engine speed is less than 550 RPM, replace throttle body. Perform TEST VER-5A. If engine speed is 550 RPM or more, test is complete.