Question

2002 Nissan X-trail model with engine codes P1122 and P1126. The engine idle speed only and no response to the gas pedal. The problem is intermittent. When started, the engine runs at idle speed only and doesn't respond to the gas pedal.

Answer 1

P1122 Electric throttle control

P1126 Throttle control motor relay

both codes are related, try to clean the throttle body first and do an idle air relearn. If that does not help the throttle body may need to be replaced.

Answer 2

P1122 Nissan Code - Electric Throttle Control Performance Problem
Read more: https://www.autocodes.com/p1122_nissan.html

P1126 Nissan Code - Thermostat Function
Read more: https://www.autocodes.com/p1126_nissan-2.html