2002 ford ranger pick up throwing obc code P1121 - check engine light is on - need to have smogged this month; what do I need to replace/check?
Mar 11, 2011 at 4:08 AM
P1121 Code
2002 FORD RANGER
RUSH1COUGAR
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Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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Fault is with the Throttle Position Sensor. Testing have to be done before replacing component.
KOER & Continuous Memory DTC P1121: Check Rationality Operation Between TP & MAF Sensors
This DTC is set when the comparison between TP and MAF sensor readings are not consistent with calibrated load values during KOER self-test. Possible causes for this fault are:
• Air Leak Between MAF Sensor & Throttle Body
• TP Sensor Not Seated Fully
• Faulty TP Sensor
• Faulty MAF Sensor
KOER & Continuous Memory DTC P1121: Check Rationality Operation Between TP & MAF Sensors
This DTC is set when the comparison between TP and MAF sensor readings are not consistent with calibrated load values during KOER self-test. Possible causes for this fault are:
• Air Leak Between MAF Sensor & Throttle Body
• TP Sensor Not Seated Fully
• Faulty TP Sensor
• Faulty MAF Sensor
Mar 11, 2011 at 12:55 PM
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