on 1999 GMC Jimmy


Asked by for the 1999 GMC Jimmy
The code is for a problem with the Air Injection system used to clean up emissions created by the engine. The link above is generic there is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate
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Customer Concern: Powertrain Control Module (PCM) code P0410.

Tests/Procedures: 1. Check the Air Injection Reaction (AIR) fuses in the AIR fuse block, Right Front (RF) inner fender.

2. Check or replace the AIR exhaust check valve(s).

3. Replace the AIR pump if the 30-amp motor fuse is blown.

4. Replace the AIR inlet hose assembly, see TSB #04-06-04-015.

5. Be sure to install the AIR inlet hose to the motor port marked "IN".

6. Seal the two wires at the motor housing grommet with silicone.

7. Activate the AIR pump with a scan tool, check for airflow at the exhaust check valves.

You most likely have a bad Air Injection Reaction pump.

P0410 Secondary Air System PerformancePossible Causes Setting Conditions
•AIR solenoid power circuit is open (check the U/H IGN fuse)
•AIR pump has failed (inspect air pump for water)
•AIR system check valves and/or pipes are damaged or leaking
•AIR system hoses or lines are damaged, pinched or kinked
•Base engine problem (e.g., excessive exhaust back pressure)
•PCM has failed
DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0155, P0171, P0172, P0174, P0175, P0300, P0440, P0442, P0446, P0506 and P0507 not set; engine speed over 500 rpm for 20 seconds in Closed Loop, engine load less than 34%, system voltage over 11.7v, ECT signal from 176-230ºF, MAF signal less than 25 g/sec, commanded A/F ratio at 14.7:1, DFCO and Power Enrichment modes not active, Catalyst Over Temperature not active, Short Term fuel trim between 124-132, and the PCM detected the HO2S signal was over 222 mv for 1.3 seconds, or there was too little change in Short Term fuel trim with the AIR pump commanded "on".