199003093 - P1131 Lambda 1 signal upstream (plausibility)

This error is detected if the "lean" control limit (with detail of Below the lower limit) or "rich" control limit (with detail of Above the upper limit) of the lambda sensor is reached.

		Test results
0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	Check visually for leaks or restrictions in the exhaust system.Also check that the lambda sensor shows no signs of wear/faults.	Move on to Step 1	Leaks or restrictions are detected in the exhaust circuit	Repair or if necessary replace the faulty components
			Faults are present in the lambda sensor	Replace the Lambda sensor    Op. 1080B90 LAMBDA SENSOR - R.R.
1	CHECK FOR THE PRESENCE OF ERRORS	All OK	Problems encountered	Operation
	Select the following system on the diagnostic equipment: Bosch diesel injection control unit EDC16C39 CF4/EOBD CAN (EP engine 1.9).Check that none of the following errors is present:- P0135- P1131- P1140- P1607- P1611- P2231	End of diagnosis	Error P0135 present	Continue as instructed in the    See Test 1080BI CHECK THE OPERATION OF THE LAMBDA SENSOR HEATER
			Error P1131 is present	Continue as instructed in the    See Test 1080BA UPSTREAM LAMBDA SENSOR OPERATION CHECK
			Error P1140 is present	Continue as instructed in the    See Test 1080BA UPSTREAM LAMBDA SENSOR OPERATION CHECK
			Error P1607 is present	Continue as instructed in the    See Test 1080BA UPSTREAM LAMBDA SENSOR OPERATION CHECK
			Error P1611 is present	Continue as instructed in the    See Test 1080BA UPSTREAM LAMBDA SENSOR OPERATION CHECK
			Error B2231 is present	Continue as instructed in the    See Test 1080BI CHECK THE OPERATION OF THE LAMBDA SENSOR HEATER