Diagnostic Procedures

Check Vehicle Operation -  Check for following:

• Water, ice, mud and snow causing wheel slippage.
• Excessive engine RPM in Neutral.
• Driven at high rate of speed.

If vehicle was operating in any of these conditions, vehicle is okay. Clear DTC and return vehicle to customer with information/explanation about DTC P1270. If vehicle was not operating in any of these conditions, clear DTC and refer to SYMPTOM DIAGNOSIS in TROUBLE SHOOTING - NO CODES article to address any driveability concerns.